Tootfinder

Three-Body Binary Formation in Clusters: Analytical Theory
Yonadav Barry Ginat, Hagai B. Perets
https://arxiv.org/abs/2404.08040 https://

Three-Body Binary Formation in Clusters: Analytical Theory
Binary formation in clusters through triple encounters between three unbound stars, 'three-body' binary formation, is one of the main dynamical formation processes of binary systems in dense environments. In this paper, we use an analytical probabilistic approach to study the process for the equal mass case and calculate a probability distribution for the orbital parameters of three-body-formed binaries, as well as their formation rate. For the first time, we give closed-form analytical express…

Formation of primordial black hole binaries and their merger rates
Martti Raidal, Ville Vaskonen, Hardi Veerm\"ae
https://arxiv.org/abs/2404.08416 htt…

Formation of primordial black hole binaries and their merger rates
We review the theory behind the formation of primordial black hole binaries and their merger rates. We consider the binary formation in the early and late Universe, emphasising the former as it gives the dominant contribution of the present primordial black hole merger rate. The binaries formed in the early Universe are highly eccentric and get easily disrupted by interactions with other primordial black holes. We discuss in detail how the suppression of the merger rate arising from such intera…

Study of Emotion Concept Formation by Integrating Vision, Physiology, and Word Information using Multilayered Multimodal Latent Dirichlet Allocation
Kazuki Tsurumaki, Chie Hieida, Kazuki Miyazawa
https://arxiv.org/abs/2404.08295

Study of Emotion Concept Formation by Integrating Vision, Physiology, and Word Information using Multilayered Multimodal Latent Dirichlet Allocation
How are emotions formed? Through extensive debate and the promulgation of diverse theories , the theory of constructed emotion has become prevalent in recent research on emotions. According to this theory, an emotion concept refers to a category formed by interoceptive and exteroceptive information associated with a specific emotion. An emotion concept stores past experiences as knowledge and can predict unobserved information from acquired information. Therefore, in this study, we attempted to…

Self-enhanced mobility enables vortex pattern formation in living matter
Haoran Xu, Yilin Wu
https://arxiv.org/abs/2403.09068 https://

Self-enhanced mobility enables vortex pattern formation in living matter
Emergence of regular spatial patterns is a hallmark in living matter ranging from subcellular organelles to developing embryos and to ecosystems. Mechanisms for the formation of ordered spatial patterns in biology often require chemical signaling that coordinates cellular behavior and differentiation. Here we discovered a novel route to large-scale regular pattern formation in living matter mediated by purely physical interactions. We found that dense bacterial living matter spontaneously devel…

Praktika – Fôli Folle Feat. Ko Saba
https://amf.didiermary.fr/praktika-foli-folle-ko-saba/
Ko Saba est une formation malienne de 6 musiciens de différentes couches sociales, fédérée par Barou Diassana, qui propose de la musique tradi-moderne métissée.

Praktika - Fôli Folle Feat. Ko Saba - African Music Forum
Praktika - Fôli Folle Feat. Ko Saba - Electro (House, EDM...)

Three-Body Binary Formation in Clusters: Analytical Theory
Yonadav Barry Ginat, Hagai B. Perets
https://arxiv.org/abs/2404.08040 https://

Three-Body Binary Formation in Clusters: Analytical Theory
Binary formation in clusters through triple encounters between three unbound stars, 'three-body' binary formation, is one of the main dynamical formation processes of binary systems in dense environments. In this paper, we use an analytical probabilistic approach to study the process for the equal mass case and calculate a probability distribution for the orbital parameters of three-body-formed binaries, as well as their formation rate. For the first time, we give closed-form analytical express…

I think the analogy between recovery of a sequential time code in MTL and the recovery of a sequential motor code in cerebellum is really interesting.
The cerebellum acts as the analog to the medial temporal lobe for sensorimotor memory | bioRxiv
https://www.biorxiv.org…

This https://arxiv.org/abs/2310.03801 has been replaced.
link: https://scholar.google.com/scholar?q=a

Formation of Merging Stellar-Mass Black Hole Binaries by Gravitational Wave Emission in Active Galactic Nucleus Disks
Many stellar-mass Black Holes (sBHs) are expected to orbit supermassive black holes at galactic centers. For galaxies with Active Galactic Nuclei (AGN), it is likely that the sBHs reside in a disk. We study the formation of sBH binaries via gravitational wave emission in such disks. We examine analytically the dynamics of two sBHs orbiting a supermassive black hole, estimate the capture cross section, and derive the eccentricity distribution of bound binaries at different frequency bands. We fi…

Eccentricity matters: Impact of eccentricity on inferred binary black hole populations
Muhammad Zeeshan, Richard O'Shaughnessy
https://arxiv.org/abs/2404.08185

Eccentricity matters: Impact of eccentricity on inferred binary black hole populations
Gravitational waves (GW), emanating from binary black holes (BBH), encode vital information about their source. GW signals enable us to deduce key properties of the BBH population across the universe, including mass, spin, and eccentricity distribution. While the masses and spins of binary components are already recognized for their insights into formation, eccentricity stands out as a distinct and quantifiable indicator of formation and evolution. Yet, despite its significance, eccentricity is…

This https://arxiv.org/abs/2402.10659 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csSI_…

Network Formation and Dynamics Among Multi-LLMs
Social networks shape opinions, behaviors, and information dissemination in human societies. As large language models (LLMs) increasingly integrate into social and professional environments, understanding their behavior within the context of social interactions and networks becomes essential. Our study analyzes LLMs' network formation behavior to examine whether the dynamics of multiple LLMs are similar to or different from human social dynamics. We observe that LLMs exhibit key social network …

Analysis of BMR tilt from AutoTAB catalog: Hinting towards the thin flux tube model?
Anu Sreedevi, Bibhuti Kumar Jha, Bidya Binay Karak, Dipankar Banerjee
https://arxiv.org/abs/2403.09229

Analysis of BMR tilt from AutoTAB catalog: Hinting towards the thin flux tube model?
One of the intriguing mechanisms of the Sun is the formation of the bipolar magnetic regions (BMRs) in the solar convection zone which are observed as regions of concentrated magnetic fields of opposite polarity on photosphere. These BMRs are tilted with respect to the equatorial line, which statistically increases with latitude. The thin flux tube model, employing the rise of magnetically buoyant flux loops and their twist by Coriolis force, is a popular paradigm for explaining the formation o…

Direct numerical simulations of microlayer formation during heterogeneous bubble nucleation
Mandeep Saini, Xiang Bin Chen, Stephane Zaleski, Daniel Fuster
https://arxiv.org/abs/2404.08377

Direct numerical simulations of microlayer formation during heterogeneous bubble nucleation
In this article, we present direct numerical simulation results for the expansion of spherical cap bubbles attached to a rigid wall due to a sudden drop in the ambient pressure. The critical pressure drop beyond which the bubble growth becomes unstable is found to match well with the predictions from classical theory of heterogeneous nucleation imposing a quasi-static bubble evolution. When the pressure drop is significantly higher than the critical value, a liquid microlayer appears between th…

Formation of primordial black hole binaries and their merger rates
Martti Raidal, Ville Vaskonen, Hardi Veerm\"ae
https://arxiv.org/abs/2404.08416 htt…

Formation of primordial black hole binaries and their merger rates
We review the theory behind the formation of primordial black hole binaries and their merger rates. We consider the binary formation in the early and late Universe, emphasising the former as it gives the dominant contribution of the present primordial black hole merger rate. The binaries formed in the early Universe are highly eccentric and get easily disrupted by interactions with other primordial black holes. We discuss in detail how the suppression of the merger rate arising from such intera…

Study of Emotion Concept Formation by Integrating Vision, Physiology, and Word Information using Multilayered Multimodal Latent Dirichlet Allocation
Kazuki Tsurumaki, Chie Hieida, Kazuki Miyazawa
https://arxiv.org/abs/2404.08295

Study of Emotion Concept Formation by Integrating Vision, Physiology, and Word Information using Multilayered Multimodal Latent Dirichlet Allocation
How are emotions formed? Through extensive debate and the promulgation of diverse theories , the theory of constructed emotion has become prevalent in recent research on emotions. According to this theory, an emotion concept refers to a category formed by interoceptive and exteroceptive information associated with a specific emotion. An emotion concept stores past experiences as knowledge and can predict unobserved information from acquired information. Therefore, in this study, we attempted to…

Unified Opinion Dynamic Modeling as Concurrent Set Relations in Rewriting Logic
Carlos Olarte, Carlos Ram\'irez, Camilo Rocha, Frank Valencia
https://arxiv.org/abs/2402.09021 …

Unified Opinion Dynamic Modeling as Concurrent Set Relations in Rewriting Logic
Social media platforms have played a key role in weaponizing the polarization of social, political, and democratic processes. This is, mainly, because they are a medium for opinion formation. Opinion dynamic models are a tool for understanding the role of specific social factors on the acceptance/rejection of opinions because they can be used to analyze certain assumptions on human behaviors. This work presents a framework that uses concurrent set relations as the formal basis to specify, simul…

Thanks in part to the formation of high-profile groups such as #Scientist #Rebellion
now many scientists join protests,
even getting arrested.
Research in the journal Nature revealed 90% of climate scientists in 2021 said they had been involved in some form of public engagement.
But climate …

A Task-Driven Multi-UAV Coalition Formation Mechanism
Xinpeng Lu, Heng Song, Huailing Ma, Junwu Zhu
https://arxiv.org/abs/2403.05108 https://

A Task-Driven Multi-UAV Coalition Formation Mechanism
With the rapid advancement of UAV technology, the problem of UAV coalition formation has become a hotspot. Therefore, designing task-driven multi-UAV coalition formation mechanism has become a challenging problem. However, existing coalition formation mechanisms suffer from low relevance between UAVs and task requirements, resulting in overall low coalition utility and unstable coalition structures. To address these problems, this paper proposed a novel multi-UAV coalition network collaborative…

Sub-100-fs formation of dark excitons in monolayer WS$_2$
Pavel V. Kolesnichenko, Lukas Wittenbecher, Qianhui Zhang, Run Yan Teh, Chandni Babu, Michael S. Fuhrer, Anders Mikkelsen, Donatas Zigmantas
https://arxiv.org/abs/2403.08390

Sub-100-fs formation of dark excitons in monolayer WS$_2$
Two-dimensional semiconductors based on transition metal dichalcogenides are promising for electronics and optoelectronics applications owing to their properties governed by strongly-bound bright and dark excitons. Momentum-forbidden dark excitons have recently received attention as better alternatives to bright excitons for long-range transport. However, accessing the dynamics of dark excitons is challenging experimentally. The most direct, but very complicated, experiment is transient angle-r…

#CactusFlowers
Apparently it’s National #Cactus Day. Here are two prickly pear flowers. June 2017

Three-dimensional, multi-wavelength beam formation with integrated metasurface optics for Sr laser cooling
Sindhu Jammi, Andrew R. Ferdinand, Zheng Luo, Zachary L. Newman, Gregory Spektor, Junyeob Song, Okan Koksal, Akash V. Rakholia, William Lunden, Daniel Sheredy, Parth B. Patel, Martin M. Boyd, Wenqi Zhu, Amit Agrawal, Travis C. Briles, Scott B. Papp

Three-dimensional, multi-wavelength beam formation with integrated metasurface optics for Sr laser cooling
We demonstrate the formation of a complex, multi-wavelength, three-dimensional laser beam configuration with integrated metasurface optics. Our experiments support the development of a compact Sr optical-lattice clock, which leverages magneto-optical trapping on atomic transitions at 461 nm and 689 nm without bulk free-space optics. We integrate six, mm-scale metasurface optics on a fused-silica substrate and illuminate them with light from optical fibers. The metasurface optics provide full co…

Enhanced ClNO$_2$ formation at the interface of sea-salt aerosol
Seokjin Moon, David T. Limmer
https://arxiv.org/abs/2403.09052 https://

Enhanced ClNO$_2$ formation at the interface of sea-salt aerosol
The reactive uptake of $\mathrm{N_2O_5}$ on sea-spray aerosol plays a key role in regulating NO$_\mathrm{x}$ concentration in the troposphere. Despite numerous field and laboratory studies, a microscopic understanding of its heterogeneous reactivity remains unclear. Here, we use molecular simulation and theory to elucidate the chlorination of $\mathrm{N_2O_5}$ to form ClNO$_2$, the primary reactive channel within sea-spray aerosol. We find the formation of ClNO$_2$ is markedly enhanced at the a…

This https://arxiv.org/abs/1704.01750 has been replaced.
link: https://scholar.google.com/scholar?q=a

Primordial black holes from collapsing antimatter
In this paper a simple (i.e. free of fine-tuning, etc.) new mechanism for primordial black hole formation based on the collapse of large antimatter systems in the early Universe is introduced. A peculiarity of this process is that, compared to their material counterparts, the collapse of large antimatter systems takes much less time due to the reversed thermodynamics of antimatter, an idea which has been proposed in our earlier paper. This model has several testable predictions. The first is …

This https://arxiv.org/abs/2403.05662 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Formation and Structure of Circumplanetary Disks and Envelopes during the Late Stages of Giant Planet Formation
Giant planets are expected to form within circumplanetary disks, which shape their formation history and the local environment. Here, we consider the formation and structure of circumplanetary disks that arise during the late stages of giant planet formation. During this phase, when most of the final mass is accumulated, incoming material enters the Hill sphere and falls toward the planet. In the absence of torques, the falling parcels of gas conserve their specific angular momentum and collect…

This https://arxiv.org/abs/2310.04507 has been replaced.
link: https://scholar.google.com/scholar?q=a

An Analytic Model For Magnetically-Dominated Accretion Disks
Recent numerical cosmological radiation-magnetohydrodynamic-thermochemical-star formation simulations have resolved the formation of quasar accretion disks with Eddington or super-Eddington accretion rates onto supermassive black holes (SMBHs) down to a few hundred gravitational radii. These 'flux-frozen' and hyper-magnetized disks appear to be qualitatively distinct from classical $α$ disks and magnetically-arrested disks: the midplane pressure is dominated by toroidal magnetic fields with pl…

This https://arxiv.org/abs/2402.10659 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csSI_…

Network Formation and Dynamics Among Multi-LLMs
Social networks shape opinions, behaviors, and information dissemination in human societies. As large language models (LLMs) increasingly integrate into social and professional environments, understanding their behavior within the context of social interactions and networks becomes essential. Our study analyzes LLMs' network formation behavior to examine whether the dynamics of multiple LLMs are similar to or different from human social dynamics. We observe that LLMs exhibit key social network …

Studying Binary Formation under Dynamical Friction Using Hill's Problem
Mark Dodici, Scott Tremaine
https://arxiv.org/abs/2404.08138 https://

Studying Binary Formation under Dynamical Friction Using Hill's Problem
Using the equations of motion from Hill's problem, with added accelerations for different forms of dynamical friction, we provide the (to-date) broadest scale-free study of friction-driven binary formation in gaseous disks and stellar clusters. We focus mainly on binary formation between stellar-mass black holes in active galactic nuclei (AGNi), considering both gas dynamical friction from AGN disks and stellar dynamical friction from the nuclear star cluster. We first find simple, dimensionles…

Radiation transport methods in star formation simulations
Richard W\"unsch
https://arxiv.org/abs/2403.05410 https://arxiv.org/pd…

Radiation transport methods in star formation simulations
Radiation transport plays a crucial role in star formation models, as certain questions within this field cannot be accurately addressed without taking it into account. Given the high complexity of the interstellar medium from which stars form, numerical simulations are frequently employed to model the star formation process. This study reviews recent methods for incorporating radiation transport into star formation simulations, discussing them in terms of the used algorithms, treatment of radi…

This https://arxiv.org/abs/2312.07523 has been replaced.
link: https://scholar.google.com/scholar?q=a

Self-Healing Distributed Swarm Formation Control Using Image Moments
Human-swarm interaction is facilitated by a low- dimensional encoding of the swarm formation, independent of the (possibly large) number of robots. We propose using image moments to encode two-dimensional formations of robots. Each robot knows its pose and the desired formation moments, and simultaneously estimates the current moments of the entire swarm while controlling its motion to better achieve the desired group moments. The estimator is a distributed optimization, requiring no centralize…

This https://arxiv.org/abs/2401.00868 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepe…

Non-prompt $\mathrm{J}/ψ$ production in proton-proton collisions with ALICE
$\mathrm{J}/ψ$ production in high-energy hadronic collisions is sensitive to both perturbative and non-perturbative aspects of quantum chromodynamics (QCD) calculations. The production of a heavy-quark pair is well-described by perturbative QCD, whereas the formation of the bound state involves non-perturbative processes, treated in different ways by various available theoretical models. ALICE can measure inclusive $\mathrm{J}/ψ$ at both forward and midrapidity down to low ${p_{\rm T}}$ and t…

This https://arxiv.org/abs/2403.05533 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

The role of polaron dressing in superradiant emission dynamics
Cooperative effects of multiple quantum emitters are characterized by transitions via delocalized collective states with altered emission properties due to the existence of inter-emitter coherences. When realized with excitonic condensed matter nanostructures, these effects are significantly affected by the presence of strong emitter-phonon coupling, which leads to the formation of polarons. We show that, while for single-emitter emission into free space this formation has no impact on its radi…

Quantum fluctuating theory for one-dimensional shock waves
Andrew Urilyon, Stefano Scopa, Giuseppe Del Vecchio Del Vecchio, Jacopo De Nardis
https://arxiv.org/abs/2403.08875

Quantum fluctuating theory for one-dimensional shock waves
We study the formation and the subsequent dynamics of shock waves in repulsive one-dimensional Bose gases during the free expansion of a density hump. By building coherent Fermi states for interacting Bethe fermions, we define a quantum fluctuating initial state expressed in terms of universal quantities, namely the density and the Luttinger parameter. In the integrable case, this fluctuating state is then evolved by generalized hydrodynamics (GHD) and, differently from non-fluctuating initial …

This https://arxiv.org/abs/2401.04843 has been replaced.
initial toot: https://mastoxiv.page/@…

Simulation of time crystal behavior for a few boson chiral soliton model in a ring
We present numerical simulations for a chiral soliton model with N=2,3 bosons in a ring, this being a few-particle version of our previous mean-field model for a quantum time crystal. Following Syrwid, Kosior, and Sacha (SKS), the notion is that a precise position measurement of one particle can lead to spontaneous formation of a bright soliton that in a time crystal should rotate intact for at least a few revolutions around the ring. In their work SKS find spontaneous formation of a soliton du…

This https://arxiv.org/abs/2403.07416 has been replaced.
initial toot: https://mastoxiv.page/@a…

Grain growth competition and formation of grain boundaries during solidification of hcp alloys
Grain growth competition during directional solidification of a polycrystal with hexagonal (hcp) symmetry (Mg-1wt%Gd alloy) is studied by phase-field modeling, exploring the effect of the temperature gradient G on the resulting grain boundary (GB) orientation selection. Results show that selection mechanisms and scaling laws derived for cubic (fcc, bcc) crystals also apply to hcp materials (within their basal plane), provided a re-estimation of fitting parameters and re-scaling to account for t…

JWST MIRI MRS Observations of T Cha - Discovery of a Spatially Resolved Disk Wind: #Planet Formation: https://www.seti.org/press-release/jwst-captures-end-planet-formation

Effect of the charge asymmetry and orbital angular momentum in the entrance channel on the hindrance to complete fusion
Elzod Khusanov (Institute of Nuclear Physics, Faculty of Physics, National University of Uzbekistan, Institute of Theoretical Physics), Avazbek Nasirov (Institute of Nuclear Physics, Joint Institute for Nuclear Research), Mukhtorali Nishonov (Faculty of Physics, National University of Uzbekistan)

Effect of the charge asymmetry and orbital angular momentum in the entrance channel on the hindrance to complete fusion
The hindrance to complete fusion is studied as a function of the charge asymmetry of colliding nuclei and orbital angular momentum of the collision. The formation and evolution of a dinuclear system (DNS) in the heavy ion collisions at energies near the Coulomb barrier is calculated in the framework of the DNS model. The DNS evolution is considered as nucleon transfer between its fragments. The results prove that a hindrance at formation of a compound nucleus (CN) is related with the quasifissi…

Optimal Uniform Circle Formation by Asynchronous Luminous Robots
Caterina Feletti, Debasish Pattanayak, Gokarna Sharma
https://arxiv.org/abs/2405.06617 htt…

Studying Binary Formation under Dynamical Friction Using Hill's Problem
Mark Dodici, Scott Tremaine
https://arxiv.org/abs/2404.08138 https://

Studying Binary Formation under Dynamical Friction Using Hill's Problem
Using the equations of motion from Hill's problem, with added accelerations for different forms of dynamical friction, we provide the (to-date) broadest scale-free study of friction-driven binary formation in gaseous disks and stellar clusters. We focus mainly on binary formation between stellar-mass black holes in active galactic nuclei (AGNi), considering both gas dynamical friction from AGN disks and stellar dynamical friction from the nuclear star cluster. We first find simple, dimensionles…

This https://arxiv.org/abs/2210.14117 has been replaced.
link: https://scholar.google.com/scholar?q=a

Plasma sheath studies using a physical treatment of electron emission from a dielectric wall
When a plasma sheath forms next to a dielectric wall, material properties determine electron absorption and reflection from the surface, impacting the sheath formation and structure. The low energy regime of this interaction is often not considered rigorously in emissive sheath simulations, but may be modeled from quantum mechanical first principles, and has important applications to plasma thrusters and fusion devices. In this work, low energy electron reflection from the wall is implemented a…

This https://arxiv.org/abs/2403.03720 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Criminal organizations exhibit hysteresis, resilience, and robustness by balancing security and efficiency
The interplay between criminal organizations and law enforcement disruption strategies is crucial in criminology. Criminal enterprises, like legitimate businesses, balance visibility and security to thrive. This study uses evolutionary game theory to analyze criminal networks' dynamics, resilience to interventions, and responses to external conditions. We find strong hysteresis effects, challenging traditional deterrence-focused strategies. Optimal thresholds for organization formation or disso…

This https://arxiv.org/abs/2310.04507 has been replaced.
link: https://scholar.google.com/scholar?q=a

An Analytic Model For Magnetically-Dominated Accretion Disks
Recent numerical cosmological radiation-magnetohydrodynamic-thermochemical-star formation simulations have resolved the formation of quasar accretion disks with Eddington or super-Eddington accretion rates onto supermassive black holes (SMBHs) down to a few hundred gravitational radii. These 'flux-frozen' and hyper-magnetized disks appear to be qualitatively distinct from classical $α$ disks and magnetically-arrested disks: the midplane pressure is dominated by toroidal magnetic fields with pl…

This https://arxiv.org/abs/2401.04260 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Outflows Driven from a Magnetic Pseudodisk
Outflows play a pivotal role in star formation as one of its most visible markers and a means of transporting mass, momentum, and angular momentum from the infalling gas into the surrounding molecular cloud. Their wide reach (at least thousands of au) is a contrast to typical disk sizes ($\sim 10-100$ au). We employ high-resolution three-dimensional nested-grid nonideal magnetohydrodynamic (MHD) simulations to study outflow properties in the Class 0 phase. We find that no disk wind is driven fr…

This https://arxiv.org/abs/2312.13199 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

An improved Halo Occupation Distribution prescription from UNITsim H_alpha Emission Line Galaxies: conformity and modified radial profile
Emission line galaxies (ELGs) are targeted by the new generation of spectroscopic surveys to make unprecedented measurements in cosmology from their distribution. Accurately interpreting this data requires understanding the imprints imposed by the physics of galaxy formation and evolution on galaxy clustering. In this work we utilize a semi-analytical model of galaxy formation (SAGE) to explore the necessary components for accurately reproducing the clustering of ELGs. We focus on developing a …

Formation and Structure of Circumplanetary Disks and Envelopes during the Late Stages of Giant Planet Formation
Aster G. Taylor, Fred C. Adams
https://arxiv.org/abs/2403.05662

Formation and Structure of Circumplanetary Disks and Envelopes during the Late Stages of Giant Planet Formation
Giant planets are expected to form within circumplanetary disks, which shape their formation history and the local environment. Here, we consider the formation and structure of circumplanetary disks that arise during the late stages of giant planet formation. During this phase, when most of the final mass is accumulated, incoming material enters the Hill sphere and falls toward the planet. In the absence of torques, the falling parcels of gas conserve their specific angular momentum and collect…

Stopping mass-selected alkaline-earth metal monofluoride beams of high energy via formation of unusually stable anions
Konstantin Gaul, Ronald F. Garcia Ruiz, Robert Berger
https://arxiv.org/abs/2403.09320

Stopping mass-selected alkaline-earth metal monofluoride beams of high energy via formation of unusually stable anions
Direct laser-coolability and a comparatively simple electronic structure render alkaline-earth metal monofluoride molecules versatile laboratories for precision tests of fundamental physics. In this theoretical work, a route for efficient stopping and cooling of high-energy hot beams of mass-selected alkaline-earth metal monofluorides via their anions is explored to facilitate subsequent precision experiments with trapped molecules. It is shown that these molecular anions possess an unusually s…

FORGE'd in FIRE III: The IMF in Quasar Accretion Disks from STARFORGE
Philip F. Hopkins, Michael Y. Grudic, Kyle Kremer, Stella S. R. Offner, David Guszejnov, Anna L. Rosen
https://arxiv.org/abs/2404.08046

FORGE'd in FIRE III: The IMF in Quasar Accretion Disks from STARFORGE
Recently, we demonstrated self-consistent formation of strongly-magnetized quasar accretion disks (QADs) from cosmological radiation-magnetohydrodynamic-thermochemical galaxy-star formation simulations, including the full STARFORGE physics shown previously to produce a reasonable IMF under typical ISM conditions. Here we study star formation and the stellar IMF in QADs, on scales from 100 au to 10 pc from the SMBH. We show it is critical to include physics often previously neglected, including …

This https://arxiv.org/abs/2403.05533 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

The role of polaron dressing in superradiant emission dynamics
Cooperative effects of multiple quantum emitters are characterized by transitions via delocalized collective states with altered emission properties due to the existence of inter-emitter coherences. When realized with excitonic condensed matter nanostructures, these effects are significantly affected by the presence of strong emitter-phonon coupling, which leads to the formation of polarons. We show that, while for single-emitter emission into free space this formation has no impact on its radi…

Water-enhancing gels exhibiting heat-activated formation of silica aerogels for protection of critical infrastructure during catastrophic wildfire
Changxin Dong, Andrea I. d'Aquino, Samya Sen, Ian A. Hall, Eric A. Appel
https://arxiv.org/abs/2405.07384

Influence of Organic Molecules and Phosphate Ions on the Formation of Biosilica Patterns in Diatoms
Svetlana Petrenko, Karen Page
https://arxiv.org/abs/2405.08496

FORGE'd in FIRE III: The IMF in Quasar Accretion Disks from STARFORGE
Philip F. Hopkins, Michael Y. Grudic, Kyle Kremer, Stella S. R. Offner, David Guszejnov, Anna L. Rosen
https://arxiv.org/abs/2404.08046

FORGE'd in FIRE III: The IMF in Quasar Accretion Disks from STARFORGE
Recently, we demonstrated self-consistent formation of strongly-magnetized quasar accretion disks (QADs) from cosmological radiation-magnetohydrodynamic-thermochemical galaxy-star formation simulations, including the full STARFORGE physics shown previously to produce a reasonable IMF under typical ISM conditions. Here we study star formation and the stellar IMF in QADs, on scales from 100 au to 10 pc from the SMBH. We show it is critical to include physics often previously neglected, including …

Observations of spiral and streamer on a candidate proto-brown dwarf
B. Riaz, D. Stamatellos, M. Machida
https://arxiv.org/abs/2403.07367 https://

Observations of spiral and streamer on a candidate proto-brown dwarf
Spirals and streamers are the hallmarks of mass accretion during the early stages of star formation. We present the first observations of a large-scale spiral and a streamer towards a very young brown dwarf candidate in its early formation stages. These observations show, for the first time, the influence of external environment that results in asymmetric mass accretion via feeding filaments onto a candidate proto-brown dwarf in the making. The impact of the streamer has produced emission in wa…

Planet formation regulated by galactic-scale interstellar turbulence
Andrew J. Winter, Myriam Benisty, Sean M. Andrews
https://arxiv.org/abs/2405.08451 htt…

This https://arxiv.org/abs/2303.07980 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Primordial black hole formation during the QCD phase transition: threshold, mass distribution and abundance
Primordial black hole (PBH) formation during cosmic phase transitions and annihilation periods, such as the QCD transition or the $e^+e^-$-annihilation, is thought to be particularly efficient due to a softening of the equation of state. We present a detailed numerical study of PBH formation during the QCD epoch in order to derive an accurate PBH mass function. We also briefly consider PBH formation during the $e^+e^-$-annihilation epoch. Our investigation confirms that, for nearly scale-invari…

Does the Fundamental Metallicity Relation Evolve with Redshift? I: The Correlation Between Offsets from the Mass-Metallicity Relation and Star Formation Rate
Alex M. Garcia, Paul Torrey, Sara Ellison, Kathryn Grasha, Lars Hernquist, Henry R. M. Zovaro, Qian-Hui Chen, Z. S. Hemler, Lisa J. Kewley, Erica J. Nelson, Ruby J. Wright
https://

Does the Fundamental Metallicity Relation Evolve with Redshift? I: The Correlation Between Offsets from the Mass-Metallicity Relation and Star Formation Rate
The scatter about the mass-metallicity relation (MZR) has a correlation with the star formation rate (SFR) of galaxies. The lack of evidence of evolution in correlated scatter at $z\lesssim2.5$ leads many to refer to the relationship between mass, metallicity, and SFR as the Fundamental Metallicity Relation (FMR). Yet, recent high-redshift ($z>3$) JWST{} observations have challenged the fundamental (i.e., redshift-invariant) nature of the FMR. In this work, we show that the cosmological simulat…

Influence of Organic Molecules and Phosphate Ions on the Formation of Biosilica Patterns in Diatoms
Svetlana Petrenko, Karen Page
https://arxiv.org/abs/2405.08496

Observations of spiral and streamer on a candidate proto-brown dwarf
B. Riaz, D. Stamatellos, M. Machida
https://arxiv.org/abs/2403.07367 https://

Observations of spiral and streamer on a candidate proto-brown dwarf
Spirals and streamers are the hallmarks of mass accretion during the early stages of star formation. We present the first observations of a large-scale spiral and a streamer towards a very young brown dwarf candidate in its early formation stages. These observations show, for the first time, the influence of external environment that results in asymmetric mass accretion via feeding filaments onto a candidate proto-brown dwarf in the making. The impact of the streamer has produced emission in wa…

Does the Fundamental Metallicity Relation Evolve with Redshift? I: The Correlation Between Offsets from the Mass-Metallicity Relation and Star Formation Rate
Alex M. Garcia, Paul Torrey, Sara Ellison, Kathryn Grasha, Lars Hernquist, Henry R. M. Zovaro, Qian-Hui Chen, Z. S. Hemler, Lisa J. Kewley, Erica J. Nelson, Ruby J. Wright
https://

Does the Fundamental Metallicity Relation Evolve with Redshift? I: The Correlation Between Offsets from the Mass-Metallicity Relation and Star Formation Rate
The scatter about the mass-metallicity relation (MZR) has a correlation with the star formation rate (SFR) of galaxies. The lack of evidence of evolution in correlated scatter at $z\lesssim2.5$ leads many to refer to the relationship between mass, metallicity, and SFR as the Fundamental Metallicity Relation (FMR). Yet, recent high-redshift ($z>3$) JWST{} observations have challenged the fundamental (i.e., redshift-invariant) nature of the FMR. In this work, we show that the cosmological simulat…

Nebular Nitrogen Line Emission in Stripped-Envelope Supernovae -- a New Progenitor Mass Diagnostic
Stan Barmentloo, Anders Jerkstrand, Koichi Iwamoto, Izumi Hachisu, Ken'ichi Nomoto, Jesper Sollerman, Stan Woosley
https://arxiv.org/abs/2403.08911

Nebular Nitrogen Line Emission in Stripped-Envelope Supernovae -- a New Progenitor Mass Diagnostic
Nitrogen is produced by CNO-cycling in massive stars, and can be ejected in significant amounts in supernova explosions. While in H-rich SNe, its [\ion{N}{II}] 6548, 6583 emission becomes obscured by strong H$α$, in explosions of He stars, this nitrogen emission becomes more visible. We here explore the formation of this line, using the \texttt{SUMO} code to compute spectra for a grid of 1D models with parameterized mixing informed from new 2D simulations. Because the mass fraction of nitrogen…

This https://arxiv.org/abs/2401.14703 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The POKEMON Speckle Survey of Nearby M Dwarfs. III. The Stellar Multiplicity Rate of M Dwarfs within 15 pc
M dwarfs are ubiquitous in our galaxy, and the rate at which they host stellar companions, and the properties of these companions, provides a window into the formation and evolution of the star(s), and of any planets that they may host. The Pervasive Overview of 'Kompanions' of Every M dwarf in Our Neighborhood (POKEMON) speckle survey of nearby M dwarfs is volume-limited from M0V through M9V out to 15 pc, with additional targets at larger distances. In total, 1125 stars were observed, and 455 …

Implications of the discovery of AF Lep b: The mass-luminosity relation for planets in the $\beta$ Pic Moving Group and the L-T transition for young companions and free-floating planets
R. Gratton, M. Bonavita, D. Mesa, A. Zurlo, S. Marino, S. Desidera, V. D'Orazi, E. Rigliaco, V. Squicciarini, P. H. Nogueira
https://arxiv.o…

Implications of the discovery of AF Lep b: The mass-luminosity relation for planets in the $β$ Pic Moving Group and the L-T transition for young companions and free-floating planets
Dynamical masses of young planets aged between 10 and 200 Myr detected in imaging play a crucial role in shaping models of giant planet formation. Regrettably, only a few such objects possess these characteristics. Furthermore, the evolutionary pattern of young sub-stellar companions in near-infrared colour-magnitude diagrams might diverge from free-floating objects, possibly due to differing formation processes. The recent identification of a giant planet around AF Lep, part of the beta Pic mo…

Non-Gaussianity from primordial black holes
Jinn-Ouk Gong, Naoya Kitajima
https://arxiv.org/abs/2404.08318 https://arxiv.org/pdf/2404…

Non-Gaussianity from primordial black holes
We study the effects of non-Gaussianity from primordial black holes (PBHs). The formation of PBHs is in general a rare event and the number of PBHs fluctuates following the Poisson distribution function, which is independent from the pre-existing inflationary adiabatic fluctuations. Such fluctuations can dominate over the adiabatic mode on small scales. We focus on the non-Gaussianity of matter density fluctuations induced by the Poisson fluctuation of PBHs and discuss the potentially observabl…

Determining stellar accretion rates from $Pa_{\alpha}$ and $Br_{\beta}$ emission lines with JWST NIRSpec
Ciar\`an Rogers, Guido de Marchi, Bernhard Brandl
https://arxiv.org/abs/2403.09568

Determining stellar accretion rates from $Pa_α$ and $Br_β$ emission lines with JWST NIRSpec
In this letter we present the first systematic spectroscopic measurements of the Near-InfraRed (NIR) hydrogen recombination lines $Pa_α$ ($λ= 1.875 μm$) and $Br_β$ ($λ= 2.626 μm$), produced by pre-main sequence (PMS) stars. These stars, consisting of T Tauri and Herbig AeBe stars are located in the massive Galactic star-formation region NGC 3603. The measurements were obtained from JWST NIRSpec, using multi-object spectroscopy (MOS) mode. Utilising existing empirical relations between $L_…

Timing the Milky Way bar formation and the accompanying radial migration episode
Misha Haywood, Sergey Khoperskov, Valeria Cerqui, Paola Di Matteo, David Katz, Owain Snaith
https://arxiv.org/abs/2403.08963

Timing the Milky Way bar formation and the accompanying radial migration episode
We derive the metallicity profile of the Milky Way low-$α$ disc population from 2 to 20 kpc from the Galactic centre in 1 Gyr age bins using the astroNN catalogue, and show that it is highly structured, with a plateau between 4 and 7 kpc and a break at 10-12 kpc. We argue that these features result from the two main bar resonances, the corotation and the Outer Lindblad Resonance (OLR), respectively. We show that the break in the metallicity profile is most visible in stars having 7-8 Gyr, reac…

Non-Gaussianity from primordial black holes
Jinn-Ouk Gong, Naoya Kitajima
https://arxiv.org/abs/2404.08318 https://arxiv.org/pdf/2404…

Non-Gaussianity from primordial black holes
We study the effects of non-Gaussianity from primordial black holes (PBHs). The formation of PBHs is in general a rare event and the number of PBHs fluctuates following the Poisson distribution function, which is independent from the pre-existing inflationary adiabatic fluctuations. Such fluctuations can dominate over the adiabatic mode on small scales. We focus on the non-Gaussianity of matter density fluctuations induced by the Poisson fluctuation of PBHs and discuss the potentially observabl…

Gravitational Wave Phase Shifts in Eccentric Black Hole Mergers as a Probe of Dynamical Formation Environments
Johan SamsingNBI, Kai HendriksNBI, Lorenz ZwickNBI, Daniel J. D'OrazioNBI, Bin LiuNBI, Zhejiang University
https://arxiv.org/abs/2403.05625

Gravitational Wave Phase Shifts in Eccentric Black Hole Mergers as a Probe of Dynamical Formation Environments
We quantify for the first time the gravitational wave (GW) phase shift appearing in the waveform of eccentric binary black hole (BBH) mergers formed dynamically in three-body systems. For this, we have developed a novel numerical method where we construct a reference binary, by evolving the post-Newtonian (PN) evolution equations backwards from a point near merger without the inclusion of the third object, that can be compared to the real binary that evolves under the influence from the third B…

Timing the Milky Way bar formation and the accompanying radial migration episode
Misha Haywood, Sergey Khoperskov, Valeria Cerqui, Paola Di Matteo, David Katz, Owain Snaith
https://arxiv.org/abs/2403.08963

Timing the Milky Way bar formation and the accompanying radial migration episode
We derive the metallicity profile of the Milky Way low-$α$ disc population from 2 to 20 kpc from the Galactic centre in 1 Gyr age bins using the astroNN catalogue, and show that it is highly structured, with a plateau between 4 and 7 kpc and a break at 10-12 kpc. We argue that these features result from the two main bar resonances, the corotation and the Outer Lindblad Resonance (OLR), respectively. We show that the break in the metallicity profile is most visible in stars having 7-8 Gyr, reac…

Thermal Structure and Millimeter Emission of Protoplanetary Disk with embedded protoplanets from radiative transfer modeling
Felipe Alarc\'on, Edwin Bergin
https://arxiv.org/abs/2404.08051

Thermal Structure and Millimeter Emission of Protoplanetary Disk with embedded protoplanets from radiative transfer modeling
The discovery of protoplanets and circumplanetary disks provides a unique opportunity to characterize planet formation through observations. Massive protoplanets shape the physical and chemical structure of their host circumstellar disk by accretion, localized emission, and disk depletion. In this work, we study the thermal changes induced within the disk by protoplanet accretion and synthetic predictions through hydrodynamical simulations with post-processed radiative transfer with an emphasis…

This https://arxiv.org/abs/2203.00941 has been replaced.
link: https://scholar.google.com/scholar?q=a

Testing a New Model of Embedded Protostellar Disks Against Observation: The Majority of Orion Class 0/I Disks Are Likely Warm, Massive, and Gravitationally Unstable
We formulate a parametrized model of embedded protostellar disks and test its ability to estimate disk properties by fitting dust-continuum observations. The main physical assumptions of our model are motivated by a recent theoretical study of protostellar disk formation; these assumptions include that the disk should be marginally gravitationally unstable, and that the dominant dust heating mechanism is internal accretion heating instead of external protostellar irradiation. These assumptions …

TangoSIDM Project: Is the Stellar Mass Tully-Fisher relation consistent with SIDM?
Camila Correa, Matthieu Schaller, Joop Schaye, Sylvia Ploeckinger, Josh Borrow, Yannick Bahe
https://arxiv.org/abs/2403.09186

TangoSIDM Project: Is the Stellar Mass Tully-Fisher relation consistent with SIDM?
Self-interacting dark matter (SIDM) has the potential to significantly influence galaxy formation in comparison to the cold, collisionless dark matter paradigm (CDM), resulting in observable effects. This study aims to elucidate this influence and to demonstrate that the stellar mass Tully-Fisher relation imposes robust constraints on the parameter space of velocity-dependent SIDM models. We present a new set of cosmological hydrodynamical simulations that include the SIDM scheme from the Tango…

21cm signal from Dark Ages collapsing halos with detailed molecular cooling treatment
Hugo Plombat, Denis Puy
https://arxiv.org/abs/2404.08479 https://

21cm signal from Dark Ages collapsing halos with detailed molecular cooling treatment
Context. In order to understand the formation of the first stars, which set the transition between the Dark Ages and Cosmic Dawn epochs, it is necessary to provide a detailed description of the physics at work within the first clouds of gas which, during their gravitational collapse, will set the conditions for stars to be form through the mechanism of thermal instability. Aims. Our objective is to study in detail the molecular cooling of gas in the halos preceding the formation of the first …

Thermal Structure and Millimeter Emission of Protoplanetary Disk with embedded protoplanets from radiative transfer modeling
Felipe Alarc\'on, Edwin Bergin
https://arxiv.org/abs/2404.08051

Thermal Structure and Millimeter Emission of Protoplanetary Disk with embedded protoplanets from radiative transfer modeling
The discovery of protoplanets and circumplanetary disks provides a unique opportunity to characterize planet formation through observations. Massive protoplanets shape the physical and chemical structure of their host circumstellar disk by accretion, localized emission, and disk depletion. In this work, we study the thermal changes induced within the disk by protoplanet accretion and synthetic predictions through hydrodynamical simulations with post-processed radiative transfer with an emphasis…

A consistent explanation for the unusual initial mass function and star formation rate in the Central Molecular Zone (CMZ)
Gilles Chabrier (CRAL, ENS-Lyon, University of Exeter), Pierre Dumond (CRAL, ENS-Lyon)
https://arxiv.org/abs/2403.09316

A consistent explanation for the unusual initial mass function and star formation rate in the Central Molecular Zone (CMZ)
We examine various physical processes that may explain the shallow high-mass slope of the IMF as well as the low SFR in star-forming molecular clouds (MCs) in the Central Molecular Zone (CMZ). We show that the strong tidal field and the tidal shear experienced by the CMZ have opposite effects on the collapse of density fluctuations and nearly compensate, but in any case have a negligible impact and can not explain these unusual properties. Similarly, we show that the intense magnetic field in t…

This https://arxiv.org/abs/2309.02920 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Determining the Baryon Impact on the Matter Power Spectrum with Galaxy Clusters
The redistribution of baryonic matter in massive halos through processes like active galactic nuclei feedback and star formation leads to a suppression of the matter power spectrum on small scales. This redistribution can be measured empirically via the gas and stellar mass fractions in galaxy clusters, and leaves imprints on their electron density profiles. We constrain two semi-analytical baryon correction models with a compilation of recent Bayesian population studies of galaxy groups and cl…

A consistent explanation for the unusual initial mass function and star formation rate in the Central Molecular Zone (CMZ)
Gilles Chabrier (CRAL, ENS-Lyon, University of Exeter), Pierre Dumond (CRAL, ENS-Lyon)
https://arxiv.org/abs/2403.09316

A consistent explanation for the unusual initial mass function and star formation rate in the Central Molecular Zone (CMZ)
We examine various physical processes that may explain the shallow high-mass slope of the IMF as well as the low SFR in star-forming molecular clouds (MCs) in the Central Molecular Zone (CMZ). We show that the strong tidal field and the tidal shear experienced by the CMZ have opposite effects on the collapse of density fluctuations and nearly compensate, but in any case have a negligible impact and can not explain these unusual properties. Similarly, we show that the intense magnetic field in t…

Insights into the 21 cm field from the vanishing cross-power spectrum at the epoch of reionization
Kana Moriwaki, Angus Beane, Adam Lidz
https://arxiv.org/abs/2404.08266

Insights into the 21 cm field from the vanishing cross-power spectrum at the epoch of reionization
The early stages of the Epoch of Reionization, probed by the 21 cm line, are sensitive to the detailed properties and formation histories of the first galaxies. We use 21cmFAST and a simple, self-consistent galaxy model to examine the redshift evolution of the large-scale cross-power spectrum between the 21 cm field and line-emitting galaxies. A key transition in redshift occurs when the 21 cm field shifts from being positively correlated with the galaxy distribution to being negatively correla…

This https://arxiv.org/abs/2404.07033 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Relative Occurrence Rate Between Hot and Cold Jupiters as an Indicator to Probe Planet Migration
We propose a second-order statistic parameter $\varepsilon$, the relative occurrence rate between hot and cold Jupiters ($\varepsilon=η_{\rm HJ}/η_{\rm CJ}$), to probe the migration of gas giants. Since the planet occurrence rate is the combined outcome of the formation and migration processes, a joint analysis of hot and cold Jupiter frequency may shed light on the dynamical evolution of giant planet systems. We first investigate the behavior of $\varepsilon$ as the stellar mass changes obse…

Compact Objects in close orbits as Gravitational Wave Sources: Formation Scenarios and Properties
Zhenwei Li, Xuefei Chen
https://arxiv.org/abs/2403.06358 …

Compact Objects in close orbits as Gravitational Wave Sources: Formation Scenarios and Properties
Gravitational Waves (GWs) provide a unique way to explore our Universe. The ongoing ground-based detectors, e.g., LIGO, Virgo, and KAGRA, and the upcoming next-generation detectors, e.g., Cosmic Explorer and Einstein Telescope, as well as the future space-borne GW antennas, e.g., LISA, TianQin, and TaiJi, cover a wide range of GW frequencies {from $\sim 10^{-4}\;\rm Hz$ to $\sim 10^3\;\rm Hz$} and almost all types of compact objects in close orbits serve as the potential target sources for thes…

This https://arxiv.org/abs/2309.13115 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

FORGE'd in FIRE: Resolving the End of Star Formation and Structure of AGN Accretion Disks from Cosmological Initial Conditions
It has recently become possible to zoom-in from cosmological to sub-pc scales in galaxy simulations to follow accretion onto supermassive black holes (SMBHs). However, at some point the approximations used on ISM scales (e.g. optically-thin cooling and stellar-population-integrated star formation [SF] and feedback [FB]) break down. We therefore present the first cosmological radiation-magnetohydrodynamic (RMHD) simulation which self-consistently combines the FIRE physics (relevant on galactic/I…

Insights into the 21 cm field from the vanishing cross-power spectrum at the epoch of reionization
Kana Moriwaki, Angus Beane, Adam Lidz
https://arxiv.org/abs/2404.08266

Insights into the 21 cm field from the vanishing cross-power spectrum at the epoch of reionization
The early stages of the Epoch of Reionization, probed by the 21 cm line, are sensitive to the detailed properties and formation histories of the first galaxies. We use 21cmFAST and a simple, self-consistent galaxy model to examine the redshift evolution of the large-scale cross-power spectrum between the 21 cm field and line-emitting galaxies. A key transition in redshift occurs when the 21 cm field shifts from being positively correlated with the galaxy distribution to being negatively correla…

Compact Objects in close orbits as Gravitational Wave Sources: Formation Scenarios and Properties
Zhenwei Li, Xuefei Chen
https://arxiv.org/abs/2403.06358 …

Compact Objects in close orbits as Gravitational Wave Sources: Formation Scenarios and Properties
Gravitational Waves (GWs) provide a unique way to explore our Universe. The ongoing ground-based detectors, e.g., LIGO, Virgo, and KAGRA, and the upcoming next-generation detectors, e.g., Cosmic Explorer and Einstein Telescope, as well as the future space-borne GW antennas, e.g., LISA, TianQin, and TaiJi, cover a wide range of GW frequencies {from $\sim 10^{-4}\;\rm Hz$ to $\sim 10^3\;\rm Hz$} and almost all types of compact objects in close orbits serve as the potential target sources for thes…

This https://arxiv.org/abs/2404.07033 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Relative Occurrence Rate Between Hot and Cold Jupiters as an Indicator to Probe Planet Migration
We propose a second-order statistic parameter $\varepsilon$, the relative occurrence rate between hot and cold Jupiters ($\varepsilon=η_{\rm HJ}/η_{\rm CJ}$), to probe the migration of gas giants. Since the planet occurrence rate is the combined outcome of the formation and migration processes, a joint analysis of hot and cold Jupiter frequency may shed light on the dynamical evolution of giant planet systems. We first investigate the behavior of $\varepsilon$ as the stellar mass changes obse…

An Investigation of the Current Star Formation Rate of Star-forming Galaxies at z < 0.5 with FADO
Yaosong Yu, Qihang Chen, Liang Jing
https://arxiv.org/abs/2404.07744

An Investigation of the Current Star Formation Rate of Star-forming Galaxies at z < 0.5 with FADO
The star formation rate (SFR) is a crucial astrophysical tracer for understanding the formation and evolution of galaxies, determining the interaction between interstellar medium properties and star formation. The mainstream approach to study the stellar content in galaxies relies on pure stellar population synthesis models. However, these methods fail to account for the contamination of SFR caused by nebular gas radiation. Recent studies have indicated that neglecting nebular radiation contami…

This https://arxiv.org/abs/2310.01763 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Distinguishing the impact and signature of black holes from different origins in early cosmic history
We use semi-analytical models to study the effects of primordial black hole (PBH) accretion on the cosmic radiation background during the epoch of reionization ($z\gtrsim 6$). We consider PBHs floating in the intergalactic medium (IGM), and located inside haloes, where star formation can occur. For stars with a mass $\gtrsim 25 \rm\ M_{\odot}$, formed in suitable host haloes, we assume they quickly burn out and form stellar remnant black holes (SRBHs). Since SRBHs also accrete material from the…

This https://arxiv.org/abs/2310.01763 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Distinguishing the impact and signature of black holes from different origins in early cosmic history
We use semi-analytical models to study the effects of primordial black hole (PBH) accretion on the cosmic radiation background during the epoch of reionization ($z\gtrsim 6$). We consider PBHs floating in the intergalactic medium (IGM), and located inside haloes, where star formation can occur. For stars with a mass $\gtrsim 25 \rm\ M_{\odot}$, formed in suitable host haloes, we assume they quickly burn out and form stellar remnant black holes (SRBHs). Since SRBHs also accrete material from the…

Cold Quasar Investigation: Comparing Star Formation Rates to Black Hole Growth
Sasha Mintz, Brandon Coleman, Allison Kirkpatrick
https://arxiv.org/abs/2403.07196

Cold Quasar Investigation: Comparing Star Formation Rates to Black Hole Growth
Cold quasars are a rare population of luminous, unobscured quasars associated with host galaxies that have a high star formation rate. We aimed to study the host galaxies of sixty four of these cold quasars in order to probe how the supermassive black holes and host galaxies were coevolving. We compiled data from the XXL survey and crossmatched with the VHS, WISE, and HerMES surveys to obtain multiwavelength photometry spanning the Xray to the infrared and including optical spectroscopy. From t…

Kinematics $\&$ Star Formation in the Hub-Filament System G6.55-0.1
Saurav Sen (TIFR, Mumbai, India), Bhaswati Mookerjea (TIFR, Mumbai, India), Rolf Guesten (MPIfR, Bonn), Friedrich Wyrowski (MPIfR, Bonn), C. H Ishwara Chandra (NCRA-TIFR, Pune, India)
https://arxiv.org/abs/2404.07640…

Kinematics $\&$ Star Formation in the Hub-Filament System G6.55-0.1
Hub-filament systems (HFSs) being the potential sites of formation of star clusters and high mass stars, provide a test bed for the current theories that attempt to explain star formation globally. It is thus important to study a large number of HFSs using both intensity and velocity information to constrain these objects better observationally. We present here a study of the hub-filament system associated with G6.55-0.1 using newly obtained observations of radio continuum and $J$=2--1 transiti…

Improving the Cosmological Constraints by Inferring the Formation Channel of Extreme-mass-ratio Inspirals
Liang-Gui Zhu, Hui-Min Fan, Xian Chen, Yi-Ming Hu, Jian-dong Zhang
https://arxiv.org/abs/2403.04950

Improving the Cosmological Constraints by Inferring the Formation Channel of Extreme-mass-ratio Inspirals
Extreme-mass ratio inspirals (EMRIs) could be detected by space-borne gravitational-wave (GW) detectors, such as the Laser Interferometer Space Antenna (LISA), TianQin and Taiji. In general, locating EMRIs by space-borne GW detectors can help us select the candidate host galaxies which can be used to infer the cosmic expansion history. In this paper, we show that the localization information of EMRIs can also be used to select the candidate host AGNs which can be used to infer the formation cha…

Star formation beyond galaxies: widespread in-situ formation of intra-cluster stars in TNG50
Niusha Ahvazi, Laura V. Sales, Julio F. Navarro, Andrew Benson, Alessandro Boselli, Richard D'Souza
https://arxiv.org/abs/2403.04839

Star formation beyond galaxies: widespread in-situ formation of intra-cluster stars in TNG50
We study the fraction of the intra-cluster light (ICL) formed in-situ in the three most massive clusters of the TNG50 simulation, with virial masses $\sim 10^{14}$ M$_{\odot}$. We find that a significant fraction of ICL stars ($8\%$-$28\%$) are born in-situ. This amounts to a total stellar mass comparable to the central galaxy itself. Contrary to simple expectations, only a sub-dominant fraction of these in-situ ICL stars are born in the central regions and later re-distributed to more energeti…

This https://arxiv.org/abs/2307.02530 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

On the origin of globular clusters in a hierarchical Universe
We present an end-to-end description of the formation process of globular clusters (GCs) which combines a treatment for their formation and dynamical evolution within galaxy haloes with a state-of-the-art semi-analytic simulation of galaxy formation. Our approach allows us to obtain exquisite statistics to study the effect of the environment and assembly history of galaxies, while still allowing a very efficient exploration of the parameter space of star cluster physics. Our reference model, in…

This https://arxiv.org/abs/2402.03613 has been replaced.
link: https://scholar.google.com/scholar?q=a

Multiphase gas in elliptical galaxies: the role of Type Ia supernovae
Massive elliptical galaxies harbor large amounts of hot gas ($T\gtrsim10^6~\mathrm{K}$) in their interstellar medium (ISM) but are typically quiescent in star formation. Active-galactic nuclei (AGNs) jets and Type Ia supernovae (SNIa) inject energy into the ISM which offsets its radiative losses and keeps it hot. SNIa deposit their energy locally within the galaxy compared to the larger few$\times10~\mathrm{kpc}$-scale AGN jets. In this study, we perform high-resolution ($512^3$) hydrodynamic s…

This https://arxiv.org/abs/2402.03613 has been replaced.
link: https://scholar.google.com/scholar?q=a

Multiphase gas in elliptical galaxies: the role of Type Ia supernovae
Massive elliptical galaxies harbor large amounts of hot gas ($T\gtrsim10^6~\mathrm{K}$) in their interstellar medium (ISM) but are typically quiescent in star formation. Active-galactic nuclei (AGNs) jets and Type Ia supernovae (SNIa) inject energy into the ISM which offsets its radiative losses and keeps it hot. SNIa deposit their energy locally within the galaxy compared to the larger few$\times10~\mathrm{kpc}$-scale AGN jets. In this study, we perform high-resolution ($512^3$) hydrodynamic s…

How non-thermal pressure impacts the modelling of star formation in galaxy formation simulations
Eirini Batziou, Ulrich P. Steinwandel, Klaus Dolag, Milena Valentini
https://arxiv.org/abs/2405.03765

How non-thermal pressure impacts the modelling of star formation in galaxy formation simulations
In cosmological simulations of large-scale structure star formation and feedback in galaxies are modelled by so-called sub-grid models, that represent a physically motivated approximation of processes occurring below the resolution limit. However, when additional physical processes are considered in these simulations, for instance, magnetic fields or cosmic rays, they are often not consistently coupled within the descriptions of the underlying sub-grid star formation models. Here, we present a …

This https://arxiv.org/abs/2404.05793 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Overmassive black holes at cosmic noon: linking the local and the high-redshift Universe
We report for the first time a sample of 12 supermassive black holes (SMBHs) hosted by low-mass galaxies at cosmic noon, i.e., in a redshift range consistent with the peak of star formation history: $z \sim 1-3$. These black holes are two orders of magnitude too massive for the stellar content of their hosts when compared with the local relation for active galaxies. These overmassive systems at cosmic noon share similar properties with the high-$z$ sources found ubiquitously in recent \textit{J…

This https://arxiv.org/abs/2404.05793 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Overmassive black holes at cosmic noon: linking the local and the high-redshift Universe
We report for the first time a sample of 12 supermassive black holes (SMBHs) hosted by low-mass galaxies at cosmic noon, i.e., in a redshift range consistent with the peak of star formation history: $z \sim 1-3$. These black holes are two orders of magnitude too massive for the stellar content of their hosts when compared with the local relation for active galaxies. These overmassive systems at cosmic noon share similar properties with the high-$z$ sources found ubiquitously in recent \textit{J…

Insights into Galaxy Morphology and Star Formation: Unveiling Filamentary Structures around an Extreme Overdensity at $z \sim 1.5$ Traced by [OII] Emitters
Ronaldo Laishram, Tadayuki Kodama, Takahiro Morishita, Andreas Faisst, Yusei Koyama, Naoaki Yamamoto
https://arxiv.org/abs/2403.06369

Insights into Galaxy Morphology and Star Formation: Unveiling Filamentary Structures around an Extreme Overdensity at $z \sim 1.5$ Traced by [OII] Emitters
We explore the morphological features and star formation activities of [OII] emitters in the COSMOS UltraDeep field at $z \sim 1.5$ using JWST NIRCam data from the COSMOS-Web survey and Subaru Hyper Suprime-Cam. We also report the discovery of large filamentary structures traced by [OII] emitters, surrounding an extremely overdense core with a galaxy number density $\sim11\times$ higher than the field average. These structures span over 50 cMpc, underscoring their large scale in the cosmic web …

Galactic Chemical Evolution Models Favor an Extended Type Ia Supernova Delay-Time Distribution
Liam O. Dubay, Jennifer A. Johnson, James W. Johnson
https://arxiv.org/abs/2404.08059

Galactic Chemical Evolution Models Favor an Extended Type Ia Supernova Delay-Time Distribution
Type Ia supernovae (SNe Ia) produce most of the Fe-peak elements in the Universe and therefore are a crucial ingredient in galactic chemical evolution models. SNe Ia do not explode immediately after star formation, and the delay-time distribution (DTD) has not been definitively determined by supernova surveys or theoretical models. Because the DTD also affects the relationship among age, [Fe/H], and [$α$/Fe] in chemical evolution models, comparison with observations of stars in the Milky Way i…

Galactic Chemical Evolution Models Favor an Extended Type Ia Supernova Delay-Time Distribution
Liam O. Dubay, Jennifer A. Johnson, James W. Johnson
https://arxiv.org/abs/2404.08059

Galactic Chemical Evolution Models Favor an Extended Type Ia Supernova Delay-Time Distribution
Type Ia supernovae (SNe Ia) produce most of the Fe-peak elements in the Universe and therefore are a crucial ingredient in galactic chemical evolution models. SNe Ia do not explode immediately after star formation, and the delay-time distribution (DTD) has not been definitively determined by supernova surveys or theoretical models. Because the DTD also affects the relationship among age, [Fe/H], and [$α$/Fe] in chemical evolution models, comparison with observations of stars in the Milky Way i…

Searching for Hyper-compact star clusters in the Milky Way using LAMOST and Gaia
Hao Wu, Haibo Yuan, Yilun Wang, Zexi Niu, Huawei Zhang
https://arxiv.org/abs/2404.08234

Searching for Hyper-compact star clusters in the Milky Way using LAMOST and Gaia
During the early merger of the Milky Way, intermediate-mass black holes in merged dwarf galaxies may have been ejected from the center of their host galaxies due to gravitational waves, carrying some central stars along. This process can lead to the formation of hyper-compact star clusters, potentially hosting black holes in the mass range of $10^4$ to $10^5$ solar masses. These clusters are crucial targets for identifying and investigating intermediate-mass black holes. However, no hyper-compa…

Searching for Hyper-compact star clusters in the Milky Way using LAMOST and Gaia
Hao Wu, Haibo Yuan, Yilun Wang, Zexi Niu, Huawei Zhang
https://arxiv.org/abs/2404.08234

Searching for Hyper-compact star clusters in the Milky Way using LAMOST and Gaia
During the early merger of the Milky Way, intermediate-mass black holes in merged dwarf galaxies may have been ejected from the center of their host galaxies due to gravitational waves, carrying some central stars along. This process can lead to the formation of hyper-compact star clusters, potentially hosting black holes in the mass range of $10^4$ to $10^5$ solar masses. These clusters are crucial targets for identifying and investigating intermediate-mass black holes. However, no hyper-compa…

Observational Tests of Active Galactic Nuclei Feedback: An Overview of Approaches and Interpretation
Chris M. Harrison, Cristina Ramos Almeida
https://arxiv.org/abs/2404.08050

Observational Tests of Active Galactic Nuclei Feedback: An Overview of Approaches and Interpretation
Growing supermassive black holes (Active Galactic Nuclei; AGN) release energy with the potential to alter their host galaxies and larger-scale environment; a process named "AGN feedback". Feedback is a required component of galaxy formation models and simulations to explain observed properties of galaxy populations. We provide a broad overview of observational approaches that are designed to establish the physical processes that couple AGN energy to the multi-phase gas, or to find evidence that…

Observational Tests of Active Galactic Nuclei Feedback: An Overview of Approaches and Interpretation
Chris M. Harrison, Cristina Ramos Almeida
https://arxiv.org/abs/2404.08050

Observational Tests of Active Galactic Nuclei Feedback: An Overview of Approaches and Interpretation
Growing supermassive black holes (Active Galactic Nuclei; AGN) release energy with the potential to alter their host galaxies and larger-scale environment; a process named "AGN feedback". Feedback is a required component of galaxy formation models and simulations to explain observed properties of galaxy populations. We provide a broad overview of observational approaches that are designed to establish the physical processes that couple AGN energy to the multi-phase gas, or to find evidence that…