Tootfinder

marvel_universe: Marvel Universe social network
The Marvel Universe collaboration network, where two Marvel characters are considered linked if they jointly appear in the same Marvel comic book.
This network has 19428 nodes and 95497 edges.
Tags: Social, Fictional, Unweighted
https://networks.skewed.de/ne…

This could be great!
Cartoon Network Studios is expanding the beloved “Steven Universe” franchise with a brand-new series, “Steven Universe: Lars of the Stars,” now in development for Prime Video.
https://variety.com/2025/tv/global/ste

Halfway to the Peak - Ice Absorption Bands at z ≈ 0.5 with JWST MIRI/MRS: #galaxy is much like dust that is closer to us, helping them understand early galactic activity.

Dynamics of low-mass black hole seeds in the BRAHMA simulations using subgrid-dynamical friction: Impact on merger-driven black hole growth in the high redshift Universe
Aklant K. Bhowmick, Laura Blecha, Luke Z. Kelley, Aneesh Sivasankaran, Paul Torrey, Rainer Weinberger, Nianyi Chen, Mark Vogelsberger, Lars Hernquist, Priyamvada Natarajan
https://…

Dynamics of low-mass black hole seeds in the BRAHMA simulations using subgrid-dynamical friction: Impact on merger-driven black hole growth in the high redshift Universe
We analyze the dynamics of low-mass black hole (BH) seeds in the high-redshift ($z\gtrsim5$) Universe using a suite of $[4.5~\mathrm{Mpc}]^3$ and $[9~\mathrm{Mpc}]^3$ BRAHMA cosmological hydrodynamic simulations. The simulations form seeds with mass $M_{\mathrm{seed}}=2.2\times10^3~M_{\odot}$ in halos that exceed critical thresholds of dense & metal-poor gas mass ($5-150~M_{\mathrm{seed}}$) and the halo mass ($1000-10000~M_{\mathrm{seed}}$). While the initial BRAHMA boxes pinned the BHs to the …

A cosmology weakly dependent measurement of 2D Baryon Acoustic Oscillations scale from the Southern Photometric Local Universe Survey
U. Ribeiro, F. Avila, C. R. Bom, C. Franco, A. Cortesi, C. Mendes de Oliveira, A. Kanaan, T. Ribeiro, W. Schoenell, E. Telles, A. Bernui
https://arxiv.org/abs/2506.08288

A cosmology weakly dependent measurement of 2D Baryon Acoustic Oscillations scale from the Southern Photometric Local Universe Survey
Baryon Acoustic Oscillations (BAO) provide a robust standard ruler for observational cosmology, enabling precise constraints on the expansion history of the Universe. We present a weakly model-dependent measurement of the BAO angular scale in the low-redshift Universe using the blue galaxies from the Southern Photometric Local Universe Survey (S-PLUS). Our analysis is based on the 2-point angular correlation function applied to a selected photometric sample of $5977$ galaxies with redshifts $0.…

kinda curious abt having a tattoo in some specific places but my standard for tryna permanently put shit on my body is diagram of how the entire universe functions tier

a new amazing artwork recreation by Nicholas Rougeux (@…) : "Clavis Cælestis: A Synopsis of the Universe – Digital edition of Thomas Wright’s 1742 astronomical treatise" https://www.c82.net/work/?id=399

This https://arxiv.org/abs/2410.16860 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Typical Quantum States of the Universe are Observationally Indistinguishable
We establish three new impossibility results regarding our knowledge of the quantum state of the universe -- a central object in quantum theory. We show that, if the universal quantum state is a typical unit vector from a high-dimensional subspace H_0 of Hilbert space H (such as the one defined by a low-entropy macro-state as prescribed by the Past Hypothesis), then no observation can determine or just significantly narrow down which vector it is. In other words, the overwhelming majority of po…

Skin Deep (PC)
There's a new pirate queen in space, and she has a hit out on you, insurance commando extraordinaire Nina Pasadena. Get out there and save those cats!
TL;DR: a fun FPS stealth-ish romp with a good sense of humor and mechanics.
Skin Deep is weird, but in a good way. For some reason this universe is populated with voxel cats that crew space ships, and it's your job to get tucked away in cryosleep until pirates hijack them. Then you're woken up and h…

The fact that most people—even the punditocracy—seem to willfully not remember who was president in 2020 explains a lot of current political discourse on numerous subjects
https://skywriter.blue/pages/did:plc:swgxwbir4rrimj57pf75jckf/post/3lrbbdbrl…

And here is (a recording of) the fifth and final #AAS246 press conference about "Recent and Upcoming Discoveries in the Broader Universe": https://www.youtube.com/watch?v=nf9X5kntlYc - topics at https://aas.org/meetings/aas246/press-kit#Wed_am

This https://arxiv.org/abs/2412.09211 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

DeWitt wave functions for de Sitter JT gravity
Jackiw-Teitelboim (JT) gravity in two-dimensional de Sitter space is an intriguing model for cosmological "wave functions of the universe". Its minisuperspace version already contains all physical information. The size of compact slices is parametrized by a scale factor $h > 0$. The dilaton $ϕ$ is chosen to have positive values, $ϕ> 0$, and interpreted as size of an additional compact slice in a higher-dimensional theory. At the boundaries $h=0$, $ϕ=0$, where the volume of the universe vanis…

Machine Learning Left-Right Breaking from Gravitational Waves
William Searle, Csaba Bal\'azs, Yang Xiao, Yang Zhang
https://arxiv.org/abs/2506.09319 ht…

Machine Learning Left-Right Breaking from Gravitational Waves
First-order phase transitions in the early universe can generate stochastic gravitational waves (GWs), offering a unique probe of high-scale particle physics. The Left-Right Symmetric Model (LRSM), which restores parity symmetry at high energies and naturally incorporates the seesaw mechanism, allows for such transitions -- particularly during the spontaneous breaking of $SU(2)_R \times SU(2)_L \times U(1)_{B-L} \to SU(2)_L \times U(1)_Y$. This initial step, though less studied, is both theoret…

Average Power-Density Spectrum of short and long Fermi-GBM Gamma-Ray Bursts
Else Magnus, Jannes Loonen, Rose S. Stanley, Paul Coppin, Krijn D. de Vries, Nick van Eijndhoven
https://arxiv.org/abs/2506.09610

Average Power-Density Spectrum of short and long Fermi-GBM Gamma-Ray Bursts
Gamma-ray bursts (GRBs) are the most powerful electromagnetic outbursts in the Universe and emit a vast amount of their energy in the form of gamma rays. Their duration is extremely short on cosmic timescales, but they show a wealth of time variability in their light curves. Properties of this variability may carry information about the processes the gamma rays emerge from, which are still poorly understood. This research investigates the redshift-corrected gamma-ray light curves of 159 long GR…

Humans Have Now Seen the Dawn of Time from Earth After Breakthrough https://www.404media.co/humans-have-now-seen-the-dawn-of-time-from-earth-after-breakthrough/

Late time behavior in $f(R,\mathcal{L}_{m})$ gravity through Gaussian reconstruction and dynamical stability
Y. Kalpana Devi, S. A. Narawade, B. Mishra
https://arxiv.org/abs/2506.09568

Late time behavior in $f(R,\mathcal{L}_{m})$ gravity through Gaussian reconstruction and dynamical stability
In this paper, we explore modified gravity in the framework of $f(R, \mathcal{L}_m)$ theories by reconstructing the function $f(\mathcal{L}_m)$, where $\mathcal{L}_m = ρ$ is the matter Lagrangian, under the assumption of a pressureless, matter-dominated Universe. Using a non-parametric Gaussian process reconstruction technique applied to Hubble data, we obtain two viable models of $f(\mathcal{L}_m)$ : (i) a power-law model $f_1(\mathcal{L}_m) = α\mathcal{L}_m^{b_1}$ with $b_1 \in [0.018, 0.02…

Evidence for a sign change of the ISW effect in the very recent universe: hot voids and cold overdensities at $z<0.03$
Frode K. Hansen, Diego Garcia Lambas, Andr\'es N. Ruiz, Facundo Toscano, Luis A. Pereyra
https://arxiv.org/abs/2506.08832

Evidence for a sign change of the ISW effect in the very recent universe: hot voids and cold overdensities at $z<0.03$
We find that CMB photons passing through local voids ($z<0.03$) are hotter than expected at the $2.7-3.6σ$ level. Combined with earlier findings showing a $>5σ$ cooling of CMB photons in galactic filaments in the same redshift range, we now have possible evidence for a negative Integrated Sachs-Wolfe (ISW) effect in the very recent universe. In addition to having opposite sign, the observed amplitude is an order of magnitude larger than the predicted Rees-Sciama and ISW effects for the nearby…

from my link log —
Dissolving the Fermi paradox.
https://arxiv.org/abs/1806.02404
saved 2025-04-18 https://dotat.at/:/U1H2Q.html

Dissolving the Fermi Paradox
The Fermi paradox is the conflict between an expectation of a high {\em ex ante} probability of intelligent life elsewhere in the universe and the apparently lifeless universe we in fact observe. The expectation that the universe should be teeming with intelligent life is linked to models like the Drake equation, which suggest that even if the probability of intelligent life developing at a given site is small, the sheer multitude of possible sites should nonetheless yield a large number of pot…

The modern standard model of cosmology is a triumph of the scientific process.
On the other hand, it’s also kind of a kludge.
The modern standard model seems to glue together a bunch of disparate parts without any overarching theoretical structure.
Take inflation and dark energy.
In both cases, we have a form of pervasive energy that pushes space apart.
Inflation does it really fast and then dissipates.
Dark energy does it much slower and does not dissipate…

Our standard model of cosmology is both a triumph and a jumbled mess
The standard model of cosmology is very successful, but cosmologists are largely still in the dark about the forces that drive the Universe.

From Olivier Messiaen's ‘Technique of My Musical Language':
"My freedom is total: no prohibition weighs upon me; all sounds being admitted, all modes, all rhythms, all noises, all timbres. I am a free man: the universe is mine. I gather it like a bouquet..."

Distinguishing Monochromatic Signals in LISA and Taiji: Ultralight Dark Matter versus Gravitational Waves
Heng-Tao Xu, Yue-Hui Yao, Yong Tang, Yue-Liang Wu
https://arxiv.org/abs/2506.09744

Distinguishing Monochromatic Signals in LISA and Taiji: Ultralight Dark Matter versus Gravitational Waves
Ultralight dark matter (ULDM) is an attractive candidate for cold dark matter, one of the main mysterious components of the Universe. Recent studies suggest that gravitational-wave (GW) laser interferometers can also detect bosonic ULDM fields, which would produce monochromatic signals resembling those from gravitational waves (GWs). Distinguishing between these potential origins therefore would be essential. In this work, we develop a method to address this challenge for space-based GW interfe…

"Science is more than a body of knowledge. It's a way of thinking, a way of skeptically interrogating the universe with a fine understanding of human fallibility. If we are not able to ask skeptical questions -- to interrogate those who tell us something is true -- to be skeptical of those in authority, then we're up for grabs for the next charlatan, political or religious, who comes ambling along."
-- Carl Sagan (Charlie Rose interview)

The Evolution Of Rotating Supermassive Pop III Stars On The Main Sequence
Devesh Nandal, Ga\"el Buldgen, Daniel J. Whalen, John Regan, Tyrone E. Woods, Jonathan C. Tan
https://arxiv.org/abs/2506.08268

The Evolution Of Rotating Supermassive Pop III Stars On The Main Sequence
The detection of billion-solar-mass supermassive black holes (SMBHs) within the first billion years of cosmic history challenges conventional theories of black hole formation and growth. Simultaneously, recent JWST observations revealing exceptionally high nitrogen-to-oxygen abundance ratios in galaxies at high redshifts raise critical questions about rapid chemical enrichment mechanisms operating in the early universe. Supermassive stars (SMSs) with masses of 1000 to 10000 M$_{\odot}$ are prom…

Mergers of galaxies
Sugata Kaviraj
https://arxiv.org/abs/2506.09136 https://arxiv.org/pdf/2506.09136…

Mergers of galaxies
The evolution of our Universe is strongly influenced by the attractive force of gravity. A key aspect of this evolution, therefore, is the merging of galaxies. Here, we explore the role of mergers in shaping the properties of massive galaxies over cosmic time. Observational methods of finding mergers include identifying galaxy pairs in close proximity, visual inspection of galaxy images to identify signatures of mergers (e.g. tidal features) and using morphological parameters such as Asymmetry …

The monster isn't in the machine. It's in the mirror
https://brilliantcrank.com/every-generation-discovers-the-same-monster/?ref=brilliantcrank-newsletter
via @…

Avalon & Electric Universe - Plant Medicine | #NowPlaying

Siguiendo el especial de Pulp, presentamos «Master of the Universe», canción del 2do disco de la banda, Freaks, de 1987. Un šlbum notablemente mšs denso y oscuro que el debut y que no tuvo mucho éxito por esa época.
https://open.spotify.com/track/0GoYxBhAAApHrfGERig7Y9

On sums of $\mathscr{P}$-free forms under mis\`ere play
Alfie Davies, Sarah Miller, Rebecca Milley
https://arxiv.org/abs/2506.05257 https://

On sums of $\mathscr{P}$-free forms under misère play
Milley and Renault proved an interesting characterisation of invertible elements in the dead-ending universe: they are the games with no subpositions of outcome $\mathscr{P}$ (the '$\mathscr{P}$-free' games). We generalise their approach to obtain a stronger result and show in particular that the set of $\mathscr{P}$-free blocking games is closed under addition, which yields that every $\mathscr{P}$-free blocking game is invertible modulo the blocking universe. This has consequences for the inv…

Cascade Relaxation of the Gravitating Vacuum as a Generator of the Evolving Universe
V. N. Lukash (Astro Space Center, P. N. Lebedev Physical Institute, Russian Academy of Sciences, Russia), E. V. Mikheeva (Astro Space Center, P. N. Lebedev Physical Institute, Russian Academy of Sciences)
https://arxiv.org/abs/2506.03226

Cascade Relaxation of the Gravitating Vacuum as a Generator of the Evolving Universe
The cascade relaxation of a polarized vacuum in the expanding Universe is a chain of evolutionary epochs of decreasing its density with the exit of dominant fields (each in its own time) from the initial zero states to nonzero values, from the dominant scalar field in the early Universe to subsequent ones, including the $Λ$-term in the modern Universe. The cascade vacuum relaxation creates the entire observable cosmology from the Friedmann model with small perturbations of the metric with non-…

Replaced article(s) found for physics.gen-ph. https://arxiv.org/list/physics.gen-ph/new/
[1/1]:
A general theory of the standard model and the revelation of the dark side of the universe

This https://arxiv.org/abs/1910.10819 has been replaced.
link: https://scholar.google.com/scholar?q=a

Universe in a rotating black hole and preferred axis
If our universe was born as a baby universe on the other side of the event horizon of a black hole existing in a parent universe, then the corresponding white hole at rest provides the absolute frame of reference in the universe. In this frame, the cosmic microwave background radiation is isotropic on large scales. If the parent black hole is rotating, then its axis of rotation becomes a preferred axis in the universe. Accordingly, the absolute frame is non-inertial, although the non-inertial f…

This https://arxiv.org/abs/2311.13633 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Open AdS/CFT via a Double Trace Deformation
A concrete model of extracting the physics from the bulk of a gravitational universe is important to the study of quantum gravity and its possible relationship with experiments. Such a model can be constructed in the AdS/CFT correspondence by gluing a bath on the asymptotic boundary of the bulk anti-de Sitter (AdS) spacetime. This bath models a laboratory and is described by a quantum field theory. In the dual conformal field theory (CFT) description this coupling is achieved by a double-trace …

Deriving physical parameters of unresolved star clusters. IX. Sky background effects in the aperture photometry
Karolis Daugevi\v{c}ius, Rima Stonkut\.e, Eimantas Kri\v{s}\v{c}i\=unas, Erikas Cic\.enas, Vladas Vansevi\v{c}ius
https://arxiv.org/abs/2506.09622

Deriving physical parameters of unresolved star clusters. IX. Sky background effects in the aperture photometry
The aperture photometry method is a powerful tool that enables us to study large star cluster systems efficiently. However, its accuracy depends on various factors, including the stochasticity of the stellar initial mass function and variations in the sky background. Previously, in the eighth paper of this series, we established the best achievable limits of the aperture photometry method for star cluster studies in the local universe. The aim of this study is to determine how the sky backgroun…

Saving or Destroying the Universe with Axion-Like Particles
Anne Mareike Galda, Matthias Neubert
https://arxiv.org/abs/2506.06426 https://

Saving or Destroying the Universe with Axion-Like Particles
Light pseudoscalar resonances that couple to the Standard Model via non-renormalizable operators, such as axions and axion-like particles (ALPs), generate contributions to the renormalization group evolution equations of couplings of dimension-4 and higher-dimensional operators. In particular, they modify the $β$-function of the Higgs quartic coupling and of SM and SMEFT parameters entering this equation, thus having an impact on the instability scale of the electroweak vacuum. We employ this …

The Hype Index: an NLP-driven Measure of Market News Attention
Zheng Cao, Wanchaloem Wunkaew, Helyette Geman
https://arxiv.org/abs/2506.06329 https://

The Hype Index: an NLP-driven Measure of Market News Attention
This paper introduces the Hype Index as a novel metric to quantify media attention toward large-cap equities, leveraging advances in Natural Language Processing (NLP) for extracting predictive signals from financial news. Using the S&P 100 as the focus universe, we first construct a News Count-Based Hype Index, which measures relative media exposure by computing the share of news articles referencing each stock or sector. We then extend it to the Capitalization Adjusted Hype Index, adjusts for …

All the different species in the #StarTrek universe have different requirements for (bodily) comfort. An aspect only sometimes mentioned in the different series and movies. But we will look at this aspect for today's #TrekTriviaTuesday question.
As always no googling and no spoiling t…

Probing QCD Confinement with Spin Entanglement
The STAR Collaboration
https://arxiv.org/abs/2506.05499 https://arxiv.org/pdf/2506.054…

Probing QCD Confinement with Spin Entanglement
Once regarded as mere emptiness, the vacuum is now understood to possess a rich and complex structure, characterized by fluctuating energy fields and a condensate of virtual quark-antiquark pairs. These pairs cause spontaneous chiral symmetry breaking, a fundamental phenomenon that is believed to generate over 99% of the mass in the visible universe. However, the precise mechanism linking the chiral symmetry breaking to the mass generation associated with quark confinement remains one of the mo…

@… Not directly a Nestflix, but not a million km away either... https://mastodon.oysta.au/@oysta/114588644020339419

This https://arxiv.org/abs/2410.07694 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Unified Origin of Curvature Perturbation and Baryon Asymmetry of the Universe
We propose a unified framework that describes both the curvaton mechanism for generating primordial density fluctuations and the Affleck-Dine (AD) mechanism for baryogenesis. By introducing a complex scalar field (AD field) carrying a baryon/lepton number and its potential consisting of quadratic and quartic terms with a small baryon/lepton-number-violating mass term, we investigate the evolution of the scalar field during the radiation-dominated era following inflation. We set the initial cond…

Vacuum Homogeneous and Nonhomogeneous Metrics with Conventional and Quantized Metric Tensor: Singular or Nonsingular Solution
A. Tawfik (Egyptian Ctr. Theor. Phys., Cairo,Future U. in Egypt), S. G. Elgendi (Islamic U. in Madinah), M. Hanafy (Benha U.)
https://arxiv.org/abs/2506.08254

Vacuum Homogeneous and Nonhomogeneous Metrics with Conventional and Quantized Metric Tensor: Singular or Nonsingular Solution
To investigate whether the Universe underwent a singularity or maintained a nonsingular state, we carry out analytical and numerical analyses of the evolution of the Raychaudhuri equations in vacuum, alongside homogeneous and nonhomogeneous cosmic backgrounds. The results obtained from the Schwarzschild, Friedmann--Lemaitre--Robertson--Walker (FLRW), and Einstein--Gilbert--Straus (EGS) metrics are systematically compared. Analyzing the results from both, conventional and quantized metric tensor…

Perturbative QCD reveals the softening of matter in the cores of massive neutron stars
Oleg Komoltsev
https://arxiv.org/abs/2506.06465 https://

Perturbative QCD reveals the softening of matter in the cores of massive neutron stars
The cores of neutron stars (NSs) contain the densest matter in the universe. Rapid advancements in neutron-star observations allow unprecedented empirical access to cold, ultra-dense Quantum Chromodynamics (QCD) matter. The combination of these observations with theoretical calculations has revealed previously inaccessible features of the equation of state (EoS) and the QCD phase diagram. In this thesis, I demonstrate how perturbative-QCD calculations at asymptotically high baryon densities pro…

400 years ago #OTD the astronomer Giovanni Domenico Cassini a.k.a. #Cassini I (because they would become an astro-dynasty) was born: while #meridiana of Bologna: https://en.wikipedia.org/wiki/San_Petronio,_Bologna

Well that was an interesting one to debug... My blocky DNS service was down after a cluster restart
A given #metallb speaker won’t advertise the service if:
- the service has externalTrafficPolicy=local and there are no running endpoints on the speaker’s node
To use externalTrafficPolicy=local, the tolerations on metallb pods must match the tolerations on the destination pods…

A look at YouTube's changes to become viewers' preferred TV service and to appeal more to advertisers, and at creators' push into sitcoms, like Alan's Universe (Lucas Shaw/Bloomberg)
https://www.bloomberg.com/news/features/20

"In order to make an apple pie from scratch, you must first create the
universe."
-- Carl Sagan, Cosmos

Hot take about #StarWars #Andor:
1️⃣ It requires the viewer to pay attn to, remember & think about the story's subplots & not be an ADHD idiot
2️⃣ It makes the narrative familiar but also takes it very seriously
3️⃣ It uses the SW universe exclusively to tell a story, not t…

This https://arxiv.org/abs/2412.10309 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Sensitivity to $\mathcal{CP}$-violating effective couplings in the top-Higgs sector
The observed baryon asymmetry of the Universe requires new sources of charge-parity ($\mathcal{CP}$) violation beyond those in the Standard Model. In this work, we investigate $\mathcal{CP}$-violating effects in the top-Higgs sector using the Standard Model Effective Field Theory (SMEFT) framework. Focusing on top-pair production in association with a Higgs boson and single top-Higgs associated production at the LHC, we study $\mathcal{CP}$ violation in the top-Higgs Yukawa coupling and other H…

This https://arxiv.org/abs/2403.00909 has been replaced.
link: https://scholar.google.com/scholar?q=a

Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Resolving the Hot and Ionized Universe through the Sunyaev-Zeldovich effect
An omnipresent feature of the multi-phase ``cosmic web'' is that warm/hot (>$10^5$ K) ionized gas pervades it. This gas constitutes a relevant contribution to the overall universal matter budget across multiple scales, from the several tens of Mpc-scale IGM filaments, to the Mpc ICM, all the way down to the CGM surrounding individual galaxies from ~1 kpc up to their respective virial radii (~100 kpc). The study of the hot baryonic component of cosmic matter density represents a powerful means f…

Low noise flux estimate and data quality control monitoring in EUCLID-NISP cosmological survey
B. Kubik, R. Barbier, P. Calabria, A. Castera, E. Chabanat, F. Charlieu, J-C. Clemens, A. Ealet, S. Ferriol, W. Gillard, T. Maciaszek, E. Prieto, F. Schirra, A. Secroun, B. Serra, G. Smadja, A. Tilquin, J. Zoubianb
https://arxiv.org/ab…

Low noise flux estimate and data quality control monitoring in EUCLID-NISP cosmological survey
Euclid mission is designed to understand the dark sector of the universe. Precise redshift measurements are provided by H2RG detectors. We propose an unbiased method of fitting the flux with Poisson distributed and correlated data, which has an analytic solution and provides a reliable quality factor - fundamental features to ensure the goals of the mission. We compare our method to other techniques of signal estimation and illustrate the anomaly detection on the flight like detectors. Although…

This https://arxiv.org/abs/2302.07123 has been replaced.
initial toot: https://mastoxiv.page/@ar…

On the Arrow of Time and Organized Complexity in the Universe
There is a widespread assumption that the universe in general, and the biosphere on Earth in particular, is becoming more complex over time. This study formulates this assumption as a macroscopic law, the law of increasing complexity. It hypothesizes that this macroscopic law emerges in certain open systems, such as the observable universe and the biosphere on Earth. There are two types of complexity: disorganized and organized. The complexity associated with this assumption is organized comple…

I'm baffled that this guy is a respected analyst. Yeah, an infinite number of AI agents will spend their money on content from human creators, making those humans infinitely rich. I see no flaws in this model.

This https://arxiv.org/abs/2503.14703 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The Emerging Black Hole Mass Function in the High-Redshift Universe
Observations with the James Webb Space Telescope (JWST) have identified an abundant population of supermassive black holes (SMBHs) already in place during the first few hundred million years of cosmic history. Most of them appear overmassive relative to the stellar mass in their host systems, challenging models of early black hole seeding and growth. Multiple pathways exist to explain their formation, including heavy seeds formed from direct collapse/supermassive stars or sustained super-Edding…

Packed up my XBOX and large TV in the basement today :-(
I don't play video games every day, but 2 or 3 days a week, my daughter, who lives in Toronto, and I will play Halo online and defend the universe from Covenant forces. It's now 22 days until the moving trucks arrive, and planning for activities each day is underway. We have to allocate time for yard maintenance, packing, and cleaning. Accompanying music choices are important...
#MyPlaylist #RandomTune
https://youtu.be/t267aQJcwjs?si=jb8_X470NFFXY6Yp

This https://arxiv.org/abs/2012.08151 has been replaced.
link: https://scholar.google.com/scholar?q=a

Gravitational wave constraints on the primordial black hole dominated early universe
We calculate the gravitational waves (GWs) induced by the density fluctuations due to inhomogeneous distribution of primordial black holes (PBHs) in the case where PBHs eventually dominate and reheat the universe by Hawking evaporation. The initial PBH density fluctuations are isocurvature in nature. We find that most of the induced GWs are generated right after evaporation, when the universe transits from the PBH dominated era to the radiation dominated era and the curvature perturbation start…

This https://arxiv.org/abs/2412.10580 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

DeepWiener: Neural Networks for CMB polarization maps and power spectrum computation
To study the early Universe, it is essential to estimate cosmological parameters with high accuracy, which depends on the optimal reconstruction of Cosmic Microwave Background (CMB) maps and the measurement of their power spectrum. In this paper, we generalize the neural network developed for applying the Wiener Filter, initially presented for temperature maps in previous work, to polarization maps. Our neural network has a UNet architecture, including an extra channel for the noise variance ma…

marvel_partnerships: Marvel character partnerships (2018)
A network of partnerships among characters in the Marvel comic book universe. Nodes are either heroes or villains, and edges represent partnerships between such characters. The partnership network was extracted from Wikipedia pages of these characters, which indicate partnership relations with other such pages.
This network has 350 nodes and 346 edges.
Tags: Social, Fictional, Unweighted

Unraveling Freeze-in Dark matter through the echoes of gravitational waves
Partha Konar, Sudipta Show
https://arxiv.org/abs/2506.08106 https://

Unraveling Freeze-in Dark matter through the echoes of gravitational waves
In the quest to unravel the dark sector, feebly interacting freeze-in dark matter presents an intriguing possibility, plausibly explaining the consistent null results from various dark matter experiments. We propose a unique imprint in the form of gravitational waves generated during the freeze-in production of dark matter from heavy particle decay in the early universe. This characteristic gravitational wave signature can serve as a powerful probe for freeze-in dark matter. Our study indicates…

Traces of the evolution of cosmic void galaxies: An Integral Field Spectroscopy based analysis
Agust\'in M. Rodr\'iguez-Medrano, Dante J. Paz, Dami\'an Mast, Federico A. Stasyszyn, Andr\'es N. Ruiz
https://arxiv.org/abs/2506.07783

Traces of the evolution of cosmic void galaxies: An Integral Field Spectroscopy based analysis
Galaxies in the most underdense regions of the Universe, known as cosmic voids, exhibit astrophysical properties that suggest a distinct evolutionary path compared to galaxies in denser environments. Numerical simulations indicate that the assembly of void galaxies occurs later, leading to galaxies with younger stellar populations, low metallicities, and a high gas content in their halos, which provides the fuel to sustain elevated star formation activity. Our objective in this work is to test …

This https://arxiv.org/abs/2505.24586 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

All-sky search for individual Primordial Black Hole bursts with LHAASO
Primordial Black Holes~(PBHs) are hypothetical black holes with a wide range of masses that formed in the early universe. As a result, they may play an important cosmological role and provide a unique probe of the early universe. A PBH with an initial mass of approximately $10^{15}$~g is expected to explode today in a final burst of Hawking radiation. In this work, we conduct an all-sky search for individual PBH burst events using the data collected from March 2021 to July 2024 by the Water Che…

This https://arxiv.org/abs/2311.12098 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Union Through UNITY: Cosmology with 2,000 SNe Using a Unified Bayesian Framework
Type Ia supernovae (SNe Ia) were instrumental in establishing the acceleration of the universe's expansion. By virtue of their combination of distance reach, precision, and prevalence, they continue to provide key cosmological constraints, complementing other cosmological probes. Individual SN surveys cover only over about a factor of two in redshift, so compilations of multiple SN datasets are strongly beneficial. We assemble an up-to-date "Union" compilation of 2087 cosmologically useful SNe …

COSMOS2025 - The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging: #COSMOSWeb Unveils Largest Look Ever Into the Deep Universe: https://cosmos.astro.caltech.edu/news/87 -> thread https://bsky.app/profile/did:plc:jffd7lmmxzgstwjoad664sz4/post/3lqungqbyys2h with more links.

Discovery of Odd Radio Circles and Other Peculiars in the First Year of the EMU Survey using Object Detection
Nikhel Gupta, Ray P. Norris, Zeeshan Hayder, Minh Huynh, Heinz Andernach, Andrew M. Hopkins, Stanislav Shabala, Lawrence Rudnick, Miroslav D. Filipovi\'c, B\"arbel S. Koribalski, Lars Petersson, X. Rosalind Wang
https://

Discovery of Odd Radio Circles and Other Peculiars in the First Year of the EMU Survey using Object Detection
We present a systematic search for Odd Radio Circles (ORCs) and other unusual radio morphologies using data from the first year of the EMU (Evolutionary Map of the Universe) survey. ORCs are rare, enigmatic objects characterized by edge-brightened rings of radio emission, often found in association with distant galaxies. To identify these objects, we employ a hybrid methodology combining supervised object detection techniques and visual inspection of radio source candidates. This approach leads…

syren-baryon: Analytic emulators for the impact of baryons on the matter power spectrum
Lukas Kammerer, Deaglan J. Bartlett, Gabriel Kronberger, Harry Desmond, Pedro G. Ferreira
https://arxiv.org/abs/2506.08783

syren-baryon: Analytic emulators for the impact of baryons on the matter power spectrum
Baryonic physics has a considerable impact on the distribution of matter in our Universe on scales probed by current and future cosmological surveys, acting as a key systematic in such analyses. We seek simple symbolic parametrisations for the impact of baryonic physics on the matter power spectrum for a range of physically motivated models, as a function of wavenumber, redshift, cosmology, and parameters controlling the baryonic feedback. We use symbolic regression to construct analytic approx…

marvel_partnerships: Marvel character partnerships (2018)
A network of partnerships among characters in the Marvel comic book universe. Nodes are either heroes or villains, and edges represent partnerships between such characters. The partnership network was extracted from Wikipedia pages of these characters, which indicate partnership relations with other such pages.
This network has 350 nodes and 346 edges.
Tags: Social, Fictional, Unweighted

This https://arxiv.org/abs/2410.21225 has been replaced.
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Boosting HI-Galaxy Cross-Clustering Signal through Higher-Order Cross-Correlations
After reionization, neutral hydrogen (HI) traces the large-scale structure (LSS) of the Universe, enabling HI intensity mapping (IM) to capture the LSS in 3D and constrain key cosmological parameters. We present a new framework utilizing higher-order cross-correlations to study HI clustering around galaxies, tested using real-space data from the IllustrisTNG300 simulation. This approach computes the joint distributions of $k$-nearest neighbor ($k$NN) optical galaxies and the HI brightness tempe…

The Internal Kinematics, Stellar Population, and Gas-phase Properties of The Pseudobulge in An Ultra-diffuse Galaxy: AGC721966
Shihong Liu, Yu Rong, Huiyuan Wang, Hong-Xin Zhang, Tie Li, Yao Yao, Zhicheng He, Teng Liu, Enci Wang, Cheng Cheng, Xu Kong
https://arxiv.org/abs/2506.07457

The Internal Kinematics, Stellar Population, and Gas-phase Properties of The Pseudobulge in An Ultra-diffuse Galaxy: AGC721966
Leveraging spectroscopic data from the Sloan Digital Sky Survey, we conduct a comprehensive analysis of the central stellar velocity dispersion, stellar population properties, star formation history, and gas-phase chemical abundances in AGC721966, a unique ultra-diffuse galaxy (UDG) harboring a pseudobulge. Our findings reveal that the pseudobulge formed in the early universe but underwent a recent episode of rejuvenated star formation. The system exhibits a mass-weighted (light-weighted) stell…

The most energetic transients - tidal disruptions of high-mass stars: #ExtremeNuclearTransients (ENTs) are the most energetic transients yet observed.

Measurement of the Dispersion$\unicode{x2013}$Galaxy Cross-Power Spectrum with the Second CHIME/FRB Catalog
Haochen Wang, Kiyoshi Masui, Shion Andrew, Emmanuel Fonseca, B. M. Gaensler, R. C. Joseph, Victoria M. Kaspi, Bikash Kharel, Adam E. Lanman, Calvin Leung, Lluis Mas-Ribas, Juan Mena-Parra, Kenzie Nimmo, Aaron B. Pearlman, Ue-Li Pen, J. Xavier Prochaska, Ryan Raikman, Kaitlyn Shin, Seth R. Siegel, Kendrick M. Smith, Ingrid H. Stairs

Measurement of the Dispersion$\unicode{x2013}$Galaxy Cross-Power Spectrum with the Second CHIME/FRB Catalog
The dispersion of extragalactic fast radio bursts (FRBs) can serve as a powerful probe of the diffuse plasma between and surrounding galaxies, which contains most of the Universe's baryons. By cross-correlating the dispersion of background FRBs with the locations of foreground galaxies, we can study the relative spatial distributions of plasma and galaxies on scales of 0.1 to 50 Mpc, which are strongly affected by feedback processes in galaxy formation. Here we present the measurement of the di…

All-sky search for individual Primordial Black Hole bursts with LHAASO
Cao, Aharonian, Bai, Bao, Bastieri, Bi, Bi, Bian, Bukevich, Cai, Cao, Cao, Chang, Chang, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Cheng, Cheng, Chu, Cui, Cui, Cui, Cui, Dai, Dai, Dai, , Diao, Dong, Duan, Fan, Fan, Fang, Fang, Fang, Feng, Feng, Feng, Feng, Feng, Feng, Feng, Gabici, Gao, Gao, Gao, Gao, Gao, Ge, Ge, Geng, Giacinti, Gong, Gou, Gu, Guo, Guo, Guo, Guo…

All-sky search for individual Primordial Black Hole bursts with LHAASO
Primordial Black Holes~(PBHs) are hypothetical black holes with a wide range of masses that formed in the early universe. As a result, they may play an important cosmological role and provide a unique probe of the early universe. A PBH with an initial mass of approximately $10^{15}$~g is expected to explode today in a final burst of Hawking radiation. In this work, we conduct an all-sky search for individual PBH burst events using the data collected from March 2021 to July 2024 by the Water Che…

The Exact and Approximate Tales of Boost-Breaking Cosmological Correlators
Zhehan Qin, S\'ebastien Renaux-Petel, Xi Tong, Denis Werth, Yuhang Zhu
https://arxiv.org/abs/2506.01555

The Exact and Approximate Tales of Boost-Breaking Cosmological Correlators
Cosmological correlators offer a remarkable window into the high-energy physics governing Universe's earliest moments, with the tantalising prospect of discovering new particles. However, extracting new physics from these observables requires both precise theoretical predictions of inflationary theories and accurate, analytical templates suitable for data analysis throughout parameter and kinematic spaces. In this paper, we extend the current analytical results by computing the most general boo…

This https://arxiv.org/abs/2501.01860 has been replaced.
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Constraining eV-scale axion-like particle dark matter: insights from the M87 Galaxy
Axion-like particles (ALPs) can account for the observed dark matter (DM) of the Universe and if their masses are at the eV scale, they can decay into infrared, optical and ultraviolet photons with a decay lifetime larger than the age of the Universe.We analyze multi-wavelength data obtained from the central region of Messier 87 (M87) galaxy by several telescopes, such as, Swift, Astrosat, Kanata, Spitzer and International Ultraviolet Explorer in the infrared to ultraviolet frequencies ($\sim 2…

ASKAP-EMU radio continuum detection of planetary nebula NGC 5189: the "Infinity" nebula
A. D. Asher, Z. J. Smeaton, M. D. Filipovi\'c, A. M. Hopkins, J. Th. van Loon, T. J. Galvin, L. A. Barnes
https://arxiv.org/abs/2506.06768

ASKAP-EMU radio continuum detection of planetary nebula NGC 5189: the "Infinity" nebula
We report the radio continuum detection of well known Galactic Planetary Nebula (PN) NGC 5189, observed at 943 MHz during the Australian Square Kilometre Array Pathfinder (ASKAP) Evolutionary Map of the Universe (EMU) survey. Two detections of NGC 5189 have been made during the survey, of better resolution than previous radio surveys. Both measurements of the integrated flux density are consistent with each other, at $S_{\rm 943\,MHz} = 0.33\pm0.03$ Jy, and the spectral luminosity is $L_{\rm{94…

Constraining Dark Matter Parameters in the Lambda-CDM Framework: A Bayesian Comparison of Planck and DES Constraints
Manjeet Kunwar, Nabin Bhusal, Manil Khatiwada, Niraj Dhital
https://arxiv.org/abs/2506.07133

Constraining Dark Matter Parameters in the Lambda-CDM Framework: A Bayesian Comparison of Planck and DES Constraints
We present a Bayesian analysis of cosmological parameter constraints from early- and late-universe observations, focusing on the matter density parameter ($Ω_m$) and the amplitude of matter fluctuations ($σ_8$) within the $Λ$CDM framework. Using data from the Planck 2018 satellite mission and the Dark Energy Survey (DES) Year 3, we compute theoretical predictions for angular and matter power spectra via Boltzmann solvers and perform Markov Chain Monte Carlo (MCMC) sampling using the \texttt{…

Prospects for the Detection of High-Redshift Gamma-Ray Bursts in the Era of EP and SVOM
Jun-Jie Wei, Xue-Feng Wu
https://arxiv.org/abs/2506.04709 https://

Prospects for the Detection of High-Redshift Gamma-Ray Bursts in the Era of EP and SVOM
Gamma-ray bursts (GRBs) are a promising probe of the high-redshift Universe, but their detection remains observationally challenging. In this work, we explore the detectability of high-$z$ GRBs by the Wide-field X-ray Telescope (WXT) aboard the Einstein Probe (\emph{EP}) and the coded-mask gamma-ray imager (ECLAIRs) aboard the Space-based multi-band astronomical Variable Objects Monitor (\emph{SVOM}). Using a population synthesis model calibrated to $Swift$ GRB observations, we develop a tool t…

Impact of redshift distribution uncertainties on Lyman-break galaxy cosmological parameter inference
Francesco Petri, Boris Leistedt, Daniel J. Mortlock, Joel Leja, Stephen Thorp, Justin Alsing, Hiranya V. Peiris, Sinan Deger
https://arxiv.org/abs/2506.06475

Impact of redshift distribution uncertainties on Lyman-break galaxy cosmological parameter inference
A significant number of Lyman-break galaxies (LBGs) with redshifts 3 < z < 5 are expected to be observed by the upcoming Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST). This will enable us to probe the universe at higher redshifts than is currently possible with cosmological galaxy clustering and weak lensing surveys. However, accurate inference of cosmological parameters requires precise knowledge of the redshift distributions of selected galaxies, where the number of faint o…

Parity violation in photon quasinormal modes of black holes
Sugumi Kanno, Jiro Soda, Akira Taniguchi
https://arxiv.org/abs/2506.04149 https://

Parity violation in photon quasinormal modes of black holes
Given that black holes are ubiquitous in the universe and axion-like scalar fields are potential candidates for dark energy and/or dark matter, it is natural to consider cosmological black holes endowed with axion hair. We investigate the photon quasinormal modes of a Schwarzschild black hole with axion hair where the electromagnetic field is coupled to the axion field via a Chern-Simons interaction. We derive the master equations for the electromagnetic field as a set of coupled equations for …

Nearby dwarf galaxies with extreme star formation rates: a window into dwarf-galaxy evolution in the early Universe
S. Kaviraj, B. Bichang'a, I. Lazar, A. E. Watkins, G. Martin, R. A. Jackson
https://arxiv.org/abs/2506.03265

Nearby dwarf galaxies with extreme star formation rates: a window into dwarf-galaxy evolution in the early Universe
We study a sample of nearby (z~0.2) low-luminosity dwarf (10^7 MSun < M* < 10^8 MSun) galaxies which have extreme (0.1 - 3 MSun/yr) star formation rates (SFRs) for this mass regime, making them plausible analogues of dwarfs at z~5.5. We compare the properties of these analogues to control samples of 'normal' dwarfs, which reside on the star formation main sequence (SFMS) at z~0.2 and are matched in their stellar mass and redshift distributions to the analogue population. The analogue and normal…

Power Spectrum Emulators from Neural Networks and Tree-Based Methods
Andrei Lazanu
https://arxiv.org/abs/2506.07514 https://arxiv.org…

Power Spectrum Emulators from Neural Networks and Tree-Based Methods
We use two subsets of 2000 and 1000 \textsc{Quijote} simulations to build two power spectrum emulators, allowing for fast computations of the non-linear matter power spectrum. The first emulator works on scales $k \in [0.015,1.8]\,h/ \rm{Mpc^{-1}}$ in terms of seven cosmological parameters: the matter and baryon fraction of the energy density of the Universe $Ω_m$ and $Ω_b$, the reduced Hubble constant $h$, the scalar spectral index $n_s$, the amplitude of matter density fluctuations $σ_8$, …

This https://arxiv.org/abs/2411.09740 has been replaced.
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Type Ia supernovae
Type Ia supernovae (SNe Ia) correspond to the thermonuclear explosion of a carbon-oxygen white dwarf (C-O WD) star in a binary system, triggered by the accretion of material from another star, or the merger/collision with a secondary WD. Their phenomenal luminosity -- several billion times that of the sun -- has motivated their use as cosmological distance indicators and led to the discovery of the accelerated expansion of the universe. SNe Ia are also the main producers of iron and hence play …

Cosmological Dynamics of Accelerating Model in $f(T)$ Gravity with Special Form of Deceleration Parameter
Shivank Pal, Romanshu Garg, Gyan Prakash Singh, Gauree Shanker
https://arxiv.org/abs/2506.03756

Cosmological Dynamics of Accelerating Model in $f(T)$ Gravity with Special Form of Deceleration Parameter
In this paper, the dynamical behavior of the accelerated expansion of the universe is discussed within the framework of $f(T)$ gravity for a particular form of $ f(T)=α(-T)^{n}$. Considering a redshift-dependent parameterization of the deceleration parameter as $q(z)=q_{0}+ q_{1}\left(\frac{ \ln(N+z)}{z+1}-\ln N \right)$. We have derived the Hubble parameter in terms of redshift and discussed its effect on other cosmological parameters. Using Bayesian statistical analysis and $χ^2$-minimizati…

Revisiting Isocurvature Bounds on the Minimal QCD Axion
Peter W. Graham, Davide Racco
https://arxiv.org/abs/2506.03348 https://arxiv.…

Revisiting Isocurvature Bounds on the Minimal QCD Axion
The QCD axion has important connections to early universe cosmology. For example, it is often said that isocurvature limits rule out a combination of high axion decay constant, $f_a$, and high inflationary Hubble scale, $H_I$. High scales are theoretically motivated, so it is important to ask how robust this constraint is. We demonstrate that this constraint is naturally evaded when the quartic coupling of the complex $U(1)_\mathrm{PQ}$-breaking field is small. In this case, $f_a$ changes from …

This https://arxiv.org/abs/2411.07970 has been replaced.
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MUltiplexed Survey Telescope: Perspectives for Large-Scale Structure Cosmology in the Era of Stage-V Spectroscopic Survey
The MUltiplexed Survey Telescope (MUST) is a 6.5-meter telescope under development. Dedicated to highly-multiplexed, wide-field spectroscopic surveys, MUST observes over 20,000 targets simultaneously using 6.2-mm pitch positioning robots within a ~5 deg$^2$ field of view. MUST aims to conduct the first Stage-V spectroscopic survey in the 2030s, mapping the 3D Universe with over 100 million galaxies and quasars, spanning from the nearby Universe to a redshift of z ~ 5.5, corresponding to approxi…

Fast Luminous Extragalactic Transients in the VLA Sky Survey: Implications for the rates of Accretion-Induced Collapse Events, Fast Blue Optical Transients and Gamma Ray Burst Afterglows
Kritti Sharma, Vikram Ravi, Dillon Z. Dong, Gregg Hallinan, Casey Law, Delina Levine, Jean J. Somalwar, Jessie Miller, Nikita Kosogorov, Steven T. Myers
https://

Fast Luminous Extragalactic Transients in the VLA Sky Survey: Implications for the rates of Accretion-Induced Collapse Events, Fast Blue Optical Transients and Gamma Ray Burst Afterglows
Radio wavelengths offer a unique window into high-energy astrophysical phenomena that may be obscured or too rapidly evolving to be captured at other wavelengths. Leveraging data from the Very Large Array Sky Survey, we perform a systematic search for fast, luminous transients with characteristic timescales $\lesssim 3$ years in the nearby universe ($z \leq 0.3$). We report the discovery of five such transients, and classify them based on their synchrotron emission energetics and host galaxy pr…

A Reassessment of the Pantheon and DES 5YR Calibration Uncertainties: Dovekie
B. Popovic, W. D. Kenworthy, M. Ginolin, A. Goobar, P. Shah, B. M. Boyd, A. Do, D. Brout, D. Scolnic, M. Vincenzi, S. Dhawan, D. O. Jones, M. Smith, M. Rigault, B. Racine, E. E. Hayes, R. Chen, P. Wiseman, L. Galbany, M. Grayling, L. LaCroix, C. Barjou-Delayre, D. Kuhn, C. Lemon

A Reassessment of the Pantheon+ and DES 5YR Calibration Uncertainties: Dovekie
Type Ia Supernovae (SNe Ia) are crucial tools to measure the accelerating expansion of the universe, comprising thousands of SNe across multiple telescopes. Accurate measurements of cosmological parameters with SNe Ia require a robust understanding and cross-calibration of the telescopes and filters. A previous cross-calibration effort, 'Fragilistic', provided 25 photometric systems, but offered no public code or ability to add new surveys. We provide an open-source cross-calibration solution, …

Insights in $f(Q)$ cosmology: the relevance of the connection
Ismael Ayuso, Mariam Bouhmadi-L\'opez, Che-Yu Chen, Xiao Yan Chew, Konstantinos Dialektopoulos, Yen Chin Ong
https://arxiv.org/abs/2506.03506

Insights in $f(Q)$ cosmology: the relevance of the connection
We explore the role of the affine connection in $f(Q)$ gravity, a modified theory where gravity is governed by non-metricity within the symmetric teleparallel framework. Although the connection is constrained to be flat and torsionless, it is not uniquely determined by the metric, allowing for multiple physically distinct formulations. We analyze three such connections compatible with a homogeneous and isotropic universe to show that they yield markedly different cosmological dynamics, even und…

Magnetogenesis from Sawtooth Coupling: Gravitational Wave Probe of Reheating
Subhasis Maiti
https://arxiv.org/abs/2506.06183 https://…

Magnetogenesis from Sawtooth Coupling: Gravitational Wave Probe of Reheating
The detection of gravitational waves (GWs) by LIGO-Virgo and pulsar timing arrays (PTAs) has opened a new window into early universe cosmology. Yet, the origin of large-scale magnetic fields and the dynamics of the reheating epoch remain poorly understood. In this work, we study the generation of secondary GWs (SGWs) sourced by primordial magnetic fields produced via a Sawtooth-type coupling during reheating with a general background evolution. We show that the reheating equation of state signi…

Global Kinetic Simulations of Monster Shocks and Their Emission
Dominic Bernardi, Yajie Yuan, Alexander Y. Chen
https://arxiv.org/abs/2506.04175 https://…

Global Kinetic Simulations of Monster Shocks and Their Emission
Fast magnetosonic waves are one of the two low-frequency plasma modes that can exist in a neutron star magnetosphere. It was recently realized that these waves may become nonlinear within the magnetosphere and steepen into some of the strongest shocks in the universe. These shocks, when in the appropriate parameter regime, may emit GHz radiation in the form of precursor waves. We present the first global Particle-in-Cell simulations of the nonlinear steepening of fast magnetosonic waves in a di…

This https://arxiv.org/abs/2408.08740 has been replaced.
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Anisotropic universe with anisotropic dark energy
We investigate the anisotropic parameterization of the dark energy equation of state within the framework of an axisymmetric (planar) Bianchi-I universe. Using the latest Pantheon+ Type Ia Supernova dataset, augmented by SH0ES Cepheid distance calibrators, we constrain both the equation of state for anisotropic dark energy and other standard cosmological parameters. Additionally, we examine the presence of an underlying anisotropic axis. Our analysis yields a mean anisotropic dark energy equati…

The Impact of Cluster Mergers on Galaxy Properties
O\u{g}uzhan \c{C}ak{\i}r, Matt S. Owers, Lucas C. Kimmig, Paul Nulsen, Mina Pak, Gabriella Quattropani, Warrick J. Couch
https://arxiv.org/abs/2506.04799

The Impact of Cluster Mergers on Galaxy Properties
Being the most energetic events in the known universe, the impact of galaxy cluster mergers on the properties of the resident galaxies has yet to be well-understood. In this paper, we investigate the effects of merging environments on star formation in nearby clusters ($0.04

This https://arxiv.org/abs/2503.07718 has been replaced.
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Deciphering the Sources of Cosmic Neutrinos
More than a decade ago, the IceCube Neutrino Observatory discovered a diffuse flux of 10 TeV-10 PeV neutrinos from our Universe. This flux of unknown origin most likely emanates from an extragalactic population of neutrino sources, which are individually too faint to appear as bright emitters. We review constraints on extragalactic neutrino source populations based on the non-detection of the brightest neutrino source. Extending previous work, we discuss limitations of source populations based …

Mergers and Recoil in Triple Massive Black Hole Systems from Illustris
Pranav Satheesh, Laura Blecha, Luke Zoltan Kelley
https://arxiv.org/abs/2506.04369 h…

Mergers and Recoil in Triple Massive Black Hole Systems from Illustris
Massive black hole binaries (MBHBs) form through galaxy mergers and are among the loudest sources of gravitational waves (GWs) in the universe. If the binary inspiral time is long, a subsequent galaxy merger can introduce a third black hole, forming a triple system. In the Illustris cosmological simulation, 6% of MBHBs form such triples at parsec scales, where strong three-body interactions are likely. We apply results from numerical simulations of triple MBHs to strong triples identified in Il…

ViT-based Local Volume dwarf galaxy Identificationin (VIDA) in the CSST survey
Han Qu, Zhen Yuan, Chengliang Wei, Chao Liu, Jiang Chang, Guoliang Li, Nicolas F. Martin, Chaowei Tsai, Shi Shao, Yu Luo, Ran Li, Xi Kang, Xiangxiang Xue, Zhou Fan
https://arxiv.org/abs/2506.04361

ViT-based Local Volume dwarf galaxy Identificationin (VIDA) in the CSST survey
Identifying dwarf galaxies within the Local Volume is crucial for constraining the luminosity function of satellite galaxies in the nearby universe. We report the detection capabilities of dwarf galaxies within the Local Volume using the Chinese Space Station Telescope (CSST). Based on the simulated imaging data of CSST, we develop a detection and classification pipeline that combines traditional image-based search techniques with advanced machine learning classification models. The simulated L…

This https://arxiv.org/abs/2308.02636 has been replaced.
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Learning from Topology: Cosmological Parameter Estimation from the Large-scale Structure
The topology of the large-scale structure of the universe contains valuable information on the underlying cosmological parameters. While persistent homology can extract this topological information, the optimal method for parameter estimation from the tool remains an open question. To address this, we propose a neural network model to map persistence images to cosmological parameters. Through a parameter recovery test, we demonstrate that our model makes accurate and precise estimates, consider…

This https://arxiv.org/abs/2408.09964 has been replaced.
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Extended $δN$ formalism: Nonspatially Flat Separate Universe Approach
The $δN$ formalism is a powerful approach to compute non-linearly the large-scale evolution of the comoving curvature perturbation $ζ$. It assumes a set of FLRW patches that evolve independently, but in doing so, all the gradient terms are discarded, which are not negligibly small in models beyond slow-roll. In this Letter, we extend the formalism to capture these gradient corrections by encoding them in a homogeneous-spatial-curvature contribution assigned to each FLRW patch. For a concrete …

Model selection using the HII galaxy Hubble diagram
Jun-Jie Wei, Fulvio Melia
https://arxiv.org/abs/2506.04819 https://arxiv.org/pdf/…

Model selection using the HII galaxy Hubble diagram
The proposal to use HII galaxies (HIIGx) and giant extragalactic HII regions (GEHR) as standard candles to construct the Hubble diagram at redshifts beyond the current reach of Type Ia supernovae has gained considerable support recently with the addition of five new HIIGx discovered by JWST. The updated sample of 231 sources now extends the redshift range of these objects to $z\sim 7.5$, mapping the Universe's expansion over $95\%$ of its current age. In this {\it Letter} we use these sources f…

A Correlation Between FRB Dispersion Measure and Foreground Large-Scale Structure
Maryam Hussaini, Liam Connor, Ralf M. Konietzka, Vikram Ravi, Jakob Faber, Kritti Sharma, Myles Sherman
https://arxiv.org/abs/2506.04186

A Correlation Between FRB Dispersion Measure and Foreground Large-Scale Structure
The distribution of baryons in the Universe remains a fundamental open question in astronomy, and the dispersion measure (DM) of Fast Radio Bursts (FRBs) serves as a valuable tool for probing this cosmic gas. We investigate the impact of the foreground cosmic web on FRB DMs using 61 localized FRBs and public galaxy catalogs. We test for the large-scale structure's impact on cosmological DM using two methods. First, we searched for a correlation between galaxy number density along the line of si…

This https://arxiv.org/abs/2310.07661 has been replaced.
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Constraints on Bianchi-I type universe with SH0ES anchored Pantheon+ SNIa data
We study the Bianchi-I cosmological model motivated by signals of statistical isotropy violation seen in cosmic microwave background (CMB) observations and others. To that end, we consider various kinds of anisotropic matter that source anisotropy in our model, specifically Cosmic strings, Magnetic fields, Domain walls and Lorentz violation generated magnetic fields. These anisotropic matter sources, taking one at a time, are studied for their co-evolution with standard model (isotropic) source…

This https://arxiv.org/abs/2404.07249 has been replaced.
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PolyBin3D: A Suite of Optimal and Efficient Power Spectrum and Bispectrum Estimators for Large-Scale Structure
By measuring, modeling and interpreting cosmological datasets, one can place strong constraints on models of the Universe. Central to this effort are summary statistics such as power spectra and bispectra, which condense the high-dimensional data into low-dimensional representations. In this work, we introduce a modern set of estimators for computing such statistics from three-dimensional clustering data, and provide a flexible Python/Cython implementation; PolyBin3D. Working in a maximum-likel…

An independent estimate of H(z) at z = 0.5 from the stellar ages of brightest cluster galaxies
S. Ilani Loubser, Adebusola B. Alabi, Matt Hilton, Yin-Zhe Ma, Xin Tang, Narges Hatamkhani, Catherine Cress, Rosalind E. Skelton, S. Andile Nkosi
https://arxiv.org/abs/2506.03836

An independent estimate of H(z) at z = 0.5 from the stellar ages of brightest cluster galaxies
Several cosmological observations (e.g., Cosmic Microwave Background (CMB), Supernovae Type Ia, and local distance ladder measurements such as Cepheids) have been used to measure the global expansion rate of the Universe, i.e., the Hubble constant, $H_{0}$. However, these precision measurements have revealed tensions between different probes that are proving difficult to solve. Independent, robust techniques must be exploited to validate results or mitigate systematic effects. We use the Cosmic…