Tootfinder

Telescopes Pop-Up on City Sidewalks to Engage Passersby in Free Astronomy Viewing Worldwide https://www.goodnewsnetwork.org/telescopes-pop-up-on-city-sidewalks-to-engage-passersby-in-free-astronomy-viewing-worldwide/

Telescopes Pop-Up on City Sidewalks to Engage Passersby in Free Astronomy Viewing Worldwide
The urban astronomy movement #PopScope has set up telescopes on sidewalks that have brought 26,000 people closer to the night sky.

Thousands of satellites with incredibly short lifetimes are being sent up into low Earth orbit.
When they fall back down they're fireballs of pollution — and what doesn't burn up hits the ground
https…

What goes up must come down: How megaconstellations like SpaceX's Starlink network pose a grave safety threat to us on Earth
Thousands of satellites with incredibly short lifetimes are being sent up into low Earth orbit. When they fall back down they're fireballs of pollution — and what doesn't burn up hits the ground.

Apache Point Observatory follow-up of ACcelerating Candidate ExopLanet host Stars (APO ACCELS): Ages for 166 Accelerating Stars in the Northern Hemisphere
Anne E. Peck (Department of Astronomy, New Mexico State University), Eric L. Nielsen (Department of Astronomy, New Mexico State University), Robert J. De Rosa (European Southern Observatory), William Thompson (National Research Council, Herzberg Astronomy and Astrophysics), Bruce Macintosh (Department of Astronomy and Astrophysics, U…

Apache Point Observatory follow-up of ACcelerating Candidate ExopLanet host Stars (APO ACCELS): Ages for 166 Accelerating Stars in the Northern Hemisphere
Directly imaged substellar companions with well-constrained ages and masses serve as vital empirical benchmarks for planet formation and evolution models. Potential benchmark companions can be identified from astrometric accelerations of their host stars. We use Gaia DR3 and Hipparcos astrometry to identify 166 northern hemisphere stars with astrometric accelerations consistent with a substellar companion between 0.5'' and 1''. For this accelerating sample we identify young stars using APO/ARCE…

Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey - Confirmation of a Long-period Giant #Planet Discovered with a Single TESS Transit: https://iopscience.iop.org/article/10.3847/1538-3881/add88b -> UNM astronomers confirm new gas giant exoplanet with help from citizen scientists worldwide: https://news.unm.edu/news/unm-astronomers-confirm-new-gas-giant-exoplanet-with-help-from-citizen-scientists-worldwide -> NASA exoplanet-hunting spacecraft and citizen scientists discover a cool new alien world: https://www.space.com/astronomy/exoplanets/nasa-exoplanet-hunting-spacecraft-and-citizen-scientists-discover-a-cool-new-alien-world

Cost Effective Designs For Next-Generation Radio Telescopes
G B Raghavkrishna, Deeptangshu Banik, B Ravi Kumar, D Veeraswamy
https://arxiv.org/abs/2506.22398

Cost Effective Designs For Next-Generation Radio Telescopes
Radio astronomy has entered its golden era, with many revolutionary facilities such as SKA, ngVLA, and LOFAR2.0 coming online in the next decade. These facilities are certain to redefine radio astronomy. However, on smaller scales-such as at institutional or amateur levels-radio astronomy is still mostly practiced for educational or personal interest. The primary reason small-scale radio astronomical experiments rarely produce cutting-edge scientific results is the limitation of funding availab…

New long-period transient #LPT space object detected. It is the first one of which we know it is pulsing in both radio frequencies and X-ray bursts. Why? More research required. Still a fascinating object!
https://www.icrar.org/xray-tr…

Nonlinear Stability and Dynamics of Supersonic Compressible Flows
Symphony Chakraborty (Institute of Astronomy,Astrophysics, Academia Sinica), Hsien Shang (Institute of Astronomy,Astrophysics, Academia Sinica)
https://arxiv.org/abs/2505.21650

Nonlinear Stability and Dynamics of Supersonic Compressible Flows
The study of shear layer instability in compressible flows is key to understanding phenomena from aerodynamics to astrophysical jets. Blumen's seminal paper [``Shear layer instability of an inviscid compressible fluid," J. Fluid Mech. {\bf 40}, 769--781 (1970)] established a linear stability framework for inviscid compressible shear flows, emphasizing velocity gradients and compressibility effects. However, the nonlinear regime remains insufficiently explored. This research extends Blumen's fra…

Molecular adhesion assay for biopolymer systems
Jeremy A. Cribb (Department of Physics and Astronomy, The University of North Carolina at Chapel Hill), Farnaz Fazelpour (Marsico Lung Institute, The University of North Carolina at Chapel Hill), David A. Wollensak (Department of Physics and Astronomy, The University of North Carolina at Chapel Hill), Danielle Rice (College of Engineering, North Carolina Agricultural and Technical State University), Max deJong (Department of Physics and A…

Molecular adhesion assay for biopolymer systems
Molecular adhesion plays a central role in many biological systems, yet existing methods to quantify adhesive strength often struggle to bridge the gap between single-molecule resolution and biologically relevant environments. Here, we present a scalable micromagnetic bead-based adhesion assay capable of quantifying detachment forces under physiologically meaningful conditions. Designed to probe mucoadhesion in the context of mucociliary clearance, our system applies controlled magnetic forces …

Applying the Principles of Universal Design to Make Astronomy More Accessible
Amanda Quirk, Tom Rice
https://arxiv.org/abs/2505.23498 https://

Applying the Principles of Universal Design to Make Astronomy More Accessible
Universal Design (UD), an approach to accessibility that was first conceptualized in architecture to make buildings physically accessible, has since been applied to curriculum design to make classrooms accessible for a larger range of learning needs. In this paper, we illustrate how the concepts of UD are relevant outside of architecture and the creation of curricula by highlighting examples of norms that exist in the field of astronomy that create barriers for disabled folks. we discuss ways t…

🇺🇦 #NowPlaying on KEXP's #AstralPlane
Pink Floyd:
🎵 Astronomy Domine
#PinkFloyd
https://secretguest.bandcamp.com/track/astronomy-domine-pink-floyd
https://open.spotify.com/track/3Y8gNcoJu1uJ5L1BZuGvqB

Detecting Land with Reflected Light Spectroscopy to Rule Out Waterworld O2 Biosignature False Positives
Anna Grace Ulses, Joshua Krissansen-Totton, Tyler D. Robinson, Victoria Meadows, David C. Catling, Jonathan J. Fortney
https://arxiv.org/abs/2506.21790

Detecting Land with Reflected Light Spectroscopy to Rule Out Waterworld O2 Biosignature False Positives
The search for life outside our solar system is at the forefront of modern astronomy, and telescopes such as the Habitable Worlds Observatory (HWO) are being designed to identify biosignatures. Molecular oxygen, O2, is considered a promising indication of life, yet substantial abiotic O2 may accumulate from H2O photolysis and hydrogen escape on a lifeless, fully (100%) ocean-covered terrestrial planet when surface O2 sinks are suppressed. This so-called waterworld false positive scenario could …

Understanding and Controlling V-Doping and S-Vacancy Behavior in Two-Dimensional Semiconductors- Toward Predictive Design
Shreya Mathela (Department of Chemistry, The Pennsylvania State University), Zhuohang Yu (Department of Materials Science and Engineering, The Pennsylvania State University), Zachary D. Ward (Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute), Nikalabh Dihingia (Department of Chemistry, The Pennsylvania State University), Alex Sr…

Understanding and Controlling V-Doping and S-Vacancy Behavior in Two-Dimensional Semiconductors- Toward Predictive Design
Doping in transition metal dichalcogenide (TMD) monolayers provides a powerful method to precisely tailor their electronic, optical, and catalytic properties for advanced technological applications, including optoelectronics, catalysis, and quantum technologies. However, doping efficiency and outcomes in these materials are strongly influenced by the complex interactions between introduced dopants and intrinsic defects, particularly sulfur vacancies. This coupling between dopants and defects ca…

The growing impact of unintended #Starlink broadband emission on radio astronomy in the #SKA-Low frequency range: #Interference to astronomy the unintended consequence of faster internet: https://www.curtin.edu.au/news/media-release/interference-to-astronomy-the-unintended-consequence-of-faster-internet/

At a tourist trap candy store in Central Indiana with a planetary science theme 🔵
#Astronomy

I've a "old #astronomy software" side project and I'm looking for the early Mac software "StarMap" or "Star Map" from Bruce Webster.
So far my searches came up empty, but I'm not a specialist in old Mac software.
Does anyone have a copy of this app?
It's described in detail in a July 1985 BYTE article: #retrocomputing

Shadow excited state molecular dynamics with the \DeltaSCF method
O. Jonathan Fajen (Department of Chemistry and PULSE Institute, Stanford University, SLAC National Accelerator Laboratory, Theoretical Division, Los Alamos National Laboratory), Oscar Gr\r{a}n\"as (Division of Materials Theory, Department of Physics and Astronomy, Uppsala University), Todd J. Mart\'inez (Department of Chemistry and PULSE Institute, Stanford University, SLAC National Accelerator Laboratory), Ande…

Shadow excited state molecular dynamics with the \DeltaSCF method
We present an extension of the shadow extended Lagrangian Born-Oppenheimer molecular dynamics (XL-BOMD) method to excited state molecular dynamics (ESMD) in the context of \DeltaSCF Kohn-Sham density functional theory, with demonstrations performed using self-consistent charge density functional tight binding (SCC-DFTB) theory. In this shadow ESMD approach, the approximate iterative solution to the exact potential in conventional ESMD is replaced by an exact single-step solution to an approxima…

Legacy of Avicenna in Astronomy
Rizoi Bakhromzod
https://arxiv.org/abs/2505.18219 https://arxiv.org/pdf/2505.18219

Legacy of Avicenna in Astronomy
The paper reassesses the largely neglected contribution of Avicenna (Ibn Sina, 980-1037) to medieval Tajik-Persian astronomy. Drawing on published primary and secondary sources, it reconstructs the main directions of his scientific activity - the construction of an observatory at Isfahan, the design of a high-precision angular instrument that anticipates the modern vernier principle, the formulation of an original method for determining terrestrial longitude from lunar culmination, a systematic…

Deterministic and Stochastic Study of the X-ray Emission from the TeV Blazar Mrk~421
Radim P\'anis (Research Centre for Theoretical Physics and Astrophysics, Institute of Physics in Opava, Silesian University in Opava, Czech Republic), Gopal Bhatta (Janusz Gil Institute of Astronomy, University of Zielona G\'ora, Zielona G\'ora, Poland), Tek P. Adhikari (CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology …

Deterministic and Stochastic Study of the X-ray Emission from the TeV Blazar Mrk~421
We present a comprehensive timing analysis of X-ray data from the {\it XMM-Newton} satellite, examining 50 light curves covering 17 years of observations of the blazar Mrk~421. This work uses classical deterministic and stochastic methods in a novel way, enabling the distinction of temporal scales and offering essential insights through correlations among parameters. Deterministic behaviors are primarily explored through recurrence quantification analysis (RQA), used innovatively by varying the…

Modulation-assisted time-delay interferometric ranging for LISA
Jean-Baptiste Bayle, Martin Staab, Samuel P. Francis, Emily Rose Rees, Robert Spero, Gerhard Heinzel
https://arxiv.org/abs/2507.19267

Modulation-assisted time-delay interferometric ranging for LISA
Laser Interferometer Space Antenna LISA represents the next frontier in gravitationalwave GW astronomy targeting the detection of millihertz gravitational signals Central to LISAs operation is the nanosecondprecision estimation of the light travel times LTTs between its constituent spacecraft Precise LTT estimates are critical for suppressing dominant laser noise with timedelay interferometry TDI and ensuring the required sensitivity to GW signals The baseline method is to modulate a pseudorand…

This https://arxiv.org/abs/2412.14775 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Energy and polarization based on-line interference mitigation in radio interferometry
Radio frequency interference (RFI) is a persistent contaminant in terrestrial radio astronomy. While new radio interferometers are becoming operational, novel sources of RFI are also emerging. In order to strengthen the mitigation of RFI in modern radio interferometers, we propose an on-line RFI mitigation scheme that can be run in the correlator of such interferometers. We combine statistics based on the energy as well as the polarization alignment of the correlated signal to develop an on-lin…

Achieving Gender Representation in Lead-Author Publications in the ASTRO3D Centre of Excellence
Kim-Vy H. Tran, Stuart Wyithe, Michelle Ding
https://arxiv.org/abs/2506.20676

Achieving Gender Representation in Lead-Author Publications in the ASTRO3D Centre of Excellence
We examine the publication rates of 400 research-focused members in the ASTRO3D Centre of Excellence by gender, project, and year from January 2018 to January 2024 (six years). Of the 443 refereed publications led by ASTRO3D members, women were first-author on 38% which is nearly double that of the astronomy field in the same period (~20%). We record a high-water mark in 2022: 46% of ASTRO3D publications were led by females and 45% of research members identified as female. Using the nine resear…

Enhancing Coherence with a Clock Transition and Dynamical Decoupling in the Cr$_7$Mn Molecular Nanomagnet
Guanchu Chen (Department of Physics and Astronomy, Amherst College, Amherst, USA, Department of Physics, University of Massachusetts Amherst, Amherst, USA), Brendan C. Sheehan (Department of Physics and Astronomy, Amherst College, Amherst, USA, Department of Physics, University of Massachusetts Amherst, Amherst, USA), Ilija Nikolov (Department of Physics and Astronomy, Amherst Coll…

Enhancing Coherence with a Clock Transition and Dynamical Decoupling in the Cr$_7$Mn Molecular Nanomagnet
Molecular magnets are attractive as spin qubits due to their chemical tunability, addressability through electron-spin resonance techniques, and long coherence times. Clock transitions (CTs), for which the system is immune to the effect of magnetic-field fluctuations to first order, provide a method to enhance the coherence time $T_2$, and to reveal mechanisms of decoherence that are not due to such fluctuations. Here we investigate two variants of Cr$_7$Mn, a spin-1 molecular nanomagnet, at fi…

'Two Worlds, Two Analemmas' From the #NASA_App :
https://apod.nasa.gov/apod/ap250621.html

<https://www.theregister.com/2025/07/23/opinion_column_starlink_interference/>
# Musk is messing with the Cosmic Dawn. Will alien hunters save the day for all mankind?
## Science friction at the far end of time for SpaceX and astronomy

Backscattering Study of Electrons from 0.1 to 3.4 MeV
M. Kanafani (Universit\'e de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen, UMR6534, France), X. Fl\'echard (Universit\'e de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen, UMR6534, France), O. Naviliat-Cuncic (Universit\'e de Caen Normandie, ENSICAEN, CNRS/IN2P3, LPC Caen, UMR6534, France, Facility for Rare Isotope Beams and Department of Physics and Astronomy, Michigan State University, USA, International Research…

Backscattering Study of Electrons from 0.1 to 3.4 MeV
Benchmarking simulation codes for electron transport and scattering in matter is a crucial step for estimating uncertainties in many applications. However, experimental data for electron energies of a few MeV is scarce to make such comparisons. We report here the measurement and the quantitative analysis of backscattering probabilities of electrons in the energy range 0.1 to 3.4~MeV impinging on YAP:Ce scintillator. The setup consists of a $2\times 2π$ calorimeter which enables, in particular,…

Hubble's excellent new image of GN 04.32.8, a reflection nebula 480 light-years away in Taurus https://www.sci.news/astronomy/hubble-reflection-nebula-taurus-molecular-cloud-14028.html

Hubble Spots Reflection Nebula in Taurus Molecular Cloud | Sci.News
Astronomers using the NASA/ESA Hubble Space Telescope have produced an outstanding image of the reflection nebula GN 04.32.8.

A comet the size of a small city... just passing by our neighborhood onto the next solar system in a few million years.
#astronomy #comet #interstellar
https://www.cbc.ca/news/science/a11pl3z-discovery-interstellar-object-1.7575576

New lens flare collection just dropped. https://mastodon.bot/@apod/114663574093410846

The SPACE Program I: The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends
K. Angelique Kahle (Max Planck Institute for Astronomy, Department of Physics and Astronomy, Heidelberg University), Jasmina Blecic (Department of Physics, New York University Abu Dhabi, Center for Astrophysics and Space Science), Reza Ashtari (JHU Applied Physics Laboratory), Laura Kreidberg (Max Planck Institute for Astronomy), Yui Kawashima (Department of Astronomy, Graduate School o…

The SPACE Program I: The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends
Sub-Neptune exoplanets are the most abundant type of planet known today. As they do not have a Solar System counterpart, many open questions exist about their composition and formation. Previous spectroscopic studies rule out aerosol-free hydrogen-helium-dominated atmospheres for many characterized sub-Neptunes but are inconclusive about their exact atmospheric compositions. Here we characterize the hot (Teq=1311K) sub-Neptune HD 86226 c, which orbits its G-type host star. Its high equilibrium …

Rotational Variables: Kepler Versus ASAS-SN
Jack Stethem (Department of Astronomy, The Ohio State University), Christopher S. Kochanek (Department of Astronomy, The Ohio State University, Center for Cosmology and AstroParticle Physics, The Ohio State University), Anya Phillips (Center for Astrophysics - Harvard and Smithsonian), Lyra Cao (Department of Physics and Astronomy, Vanderbilt University), Marc Pinsonneault (Department of Astronomy, The Ohio State University, Center for Cosmol…

Rotational Variables: Kepler Versus ASAS-SN
Rotational variables are stars that vary in brightness due to star spots modulated by rotation. They are probes of stellar magnetism, binarity, and evolution. Phillips et al. (2023) explored distinct populations of ~50,000 high-amplitude rotational variables from the All-Sky Automated Survey for Supernovae (ASAS-SN), examining correlations between stellar rotation, binarity, and activity. Here, we carry out a similar analysis of ~50,000 much lower amplitude Kepler rotational variables. The Kepl…

In-flight calibration of the Lobster Eye Imager for Astronomy
Huaqing Cheng, Hai-Wu Pan, Yuan Liu, Jingwei Hu, Haonan Yang, Donghua Zhao, Zhixing Ling, He-Yang Liu, Yifan Chen, Xiaojin Sun, Longhui Li, Ge Jin, Chen Zhang, Shuang-Nan Zhang, Weimin Yuan
https://arxiv.org/abs/2506.20369

In-flight calibration of the Lobster Eye Imager for Astronomy
The Lobster Eye Imager for Astronomy (LEIA), as a pathfinder of the Wide-field X-ray Telescope (WXT) onboard the Einstein Probe (EP) satellite, is the first lobster-eye focusing X-ray telescope with a considerably large field-of-view (FoV) ever flown. During the two and half years of operations, a series of calibration observations were performed, to fully characterize its performance and calibrate the instrumental properties. In this paper, we present the results of the in-flight calibration c…

The NSF–DOE Vera C. Rubin Observatory on Cerro Pachón in Chile has started to repeatedly scan the sky.
Some of it's first images are available at #astronomy #galaxies #rubins

A Black Hole is Born: 3D GRMHD Simulation of Black Hole Formation from Core-Collapse
Goni Halevi, Swapnil Shankar, Philipp M\"osta, Roland Haas, Erik Schnetter
https://arxiv.org/abs/2506.20837

A Black Hole is Born: 3D GRMHD Simulation of Black Hole Formation from Core-Collapse
We present the first three-dimensional, fully general-relativistic magnetohydrodynamic (3D GRMHD) simulation of a black hole (BH) formed from the collapsed core of a massive star. The ability to self-consistently capture the birth of a compact remnant in 3D is crucial for modeling natal BH properties (including masses, spins, and kicks), which are of particular interest in the era of gravitational wave astronomy. However, such simulations have remained elusive due to extreme computational chall…

Teaching Astronomy with Large Language Models
Yuan-Sen Ting, Teaghan O'Briain
https://arxiv.org/abs/2506.06921 https://arxiv.org/…

Teaching Astronomy with Large Language Models
We present a study of LLM integration in final-year undergraduate astronomy education, examining how students develop AI literacy through structured guidance and documentation requirements. We developed AstroTutor, a domain-specific astronomy tutoring system enhanced with curated arXiv content, and deployed it alongside general-purpose LLMs in the course. Students documented their AI usage through homework reflections and post-course surveys. We analyzed student evolution in AI interaction stra…

✴️ Dark dwarfs lurking at the center of our galaxy might hint at the nature of dark matter
#astronomy

Dark dwarfs lurking at the center of our galaxy might hint at the nature of dark matter
Celestial objects known as dark dwarfs may be hiding at the center of our galaxy and could offer key clues to uncover the nature of one of the most mysterious and fundamental phenomena in contemporary cosmology: dark matter.

Georgia State University’s Center for High Angular Resolution Astronomy (CHARA) Array is marking the 20th anniversary of its first scientific results, published in July 2005: #CHARA interferometer enabled the discoveries.

Can AI Dream of Unseen Galaxies? Conditional Diffusion Model for Galaxy Morphology Augmentation
Chenrui Ma, Zechang Sun, Tao Jing, Zheng Cai, Yuan-Sen Ting, Song Huang, Mingyu Li
https://arxiv.org/abs/2506.16233

Can AI Dream of Unseen Galaxies? Conditional Diffusion Model for Galaxy Morphology Augmentation
Observational astronomy relies on visual feature identification to detect critical astrophysical phenomena. While machine learning (ML) increasingly automates this process, models often struggle with generalization in large-scale surveys due to the limited representativeness of labeled datasets -- whether from simulations or human annotation -- a challenge pronounced for rare yet scientifically valuable objects. To address this, we propose a conditional diffusion model to synthesize realistic g…

Beginning later this year, the NSF–DOE Vera C. Rubin Observatory will create the ultimate movie of the night sky,
repeatedly scanning the sky for a decade to create an ultra-wide, ultra-high-definition, time-lapse record of our Universe across space and over time.
The resulting dataset, called the Legacy Survey of Space and Time (LSST), will be the largest ever amassed for optical astronomy.
This enormous, all-purpose dataset will bring the night sky to life,
enabli…

The Rise of Particle Physics
S. Ting, H. Georgi, J. Iliopoulos, L. Maiani, A. De Rujula, L. Di Lella, S. Myers, F. Marion, M. Pierini, G. Martinelli, R. Barbieri, G. Battimelli, L. Bonolis, M. Greco, G. Parisi
https://arxiv.org/abs/2507.14275

The Rise of Particle Physics
Discovery of the J Particle at Brookhaven National Laboratory and the Physics of Electrons and Positrons; The Standard Model Yesterday, Today and Tomorrow; The Rise of Gauge Theories: From Many Models to One Theory; From Charm to CP Violation; When the Standard Model Was Ignored; The Discovery of the W and Z Bosons at the CERN Proton-Antiproton Collider; A Personal History of CERN Particle Colliders (1972-2022); The Age of Gravitational Wave Astronomy; Precision Physics in the Era of (HL)LHC; R…

Can anyone recommend good reads on how astronomical #bigdata is being managed, given the massive volumes coming in from, e.g. radio telescopes? Looking for mid-range accessibility, with some technical depth, but not specific to any one telescope or pipeline - more surveys/summaries of the kinds of architectural patterns / platforms, storage & retrieval tools. TIA & please boost for reach!
#astrodon #data #astronomy

Quantitative Wavefront sensing with static Foucault and pyramid tests
Francois H\'enault, Yan Feng, Alain Spang, Laura Schreiber
https://arxiv.org/abs/2507.14104

Quantitative Wavefront sensing with static Foucault and pyramid tests
Wavefront sensors (WFS) are now core components in the fields of metrology of optical systems, biomedical optics and adaptive optics systems for astronomy. Nowadays, the most popular WFS is the Shack-Hartmann, which is fully static but suffers from a limited spatial resolution in the pupil plane of the tested optical system. Higher spatial resolutions are achievable with other types of sensors, e.g. the pyramid WFS that requires temporal modulation of the recorded signals and implies high mecha…

Wavefront super-resolution for Adaptive Optics systems on ground-based telescopes
Yutong Wu, Roland Wagner, Ronny Ramlau, Raymond H. Chan
https://arxiv.org/abs/2507.19150 https:…

Wavefront super-resolution for Adaptive Optics systems on ground-based telescopes
In ground-based astronomy, Adaptive Optics (AO) is a pivotal technique, engineered to correct wavefront phase distortions and thereby enhance the quality of the observed images. Integral to an AO system is the wavefront sensor (WFS), which is crucial for detecting wavefront aberrations from guide stars, essential for phase calculations. Many models based on a single-WFS model have been proposed to obtain the high-resolution phase of the incoming wavefront. In this paper, we delve into the realm…

High-Speed Boulders and the Debris Field in DART Ejecta
Tony L. Farnham (University of Maryland, Department of Astronomy), Jessica M. Sunshine (University of Maryland, Department of Astronomy, University of Maryland, Department of Geology), Masatoshi Hirabayashi (Daniel Guggenheim School of Aerospace Engineering, Georgia Institute of Technology), Carolyn M. Ernst (Johns Hopkins University Applied Physics Laboratory), R. Terik Daly (Johns Hopkins University Applied Physics Laboratory), …

High-Speed Boulders and the Debris Field in DART Ejecta
On 26 September 2022 the Double Asteroid Redirection Test (DART) spacecraft collided with Dimorphos, the moon of the near-Earth asteroid 65803 Didymos, in a full-scale demonstration of a kinetic impactor concept. The companion LICIACube spacecraft documented the aftermath, capturing images of the expansion and evolution of the ejecta from 29 to 243 s after the impact. We present results from our analyses of these observations, including an improved reduction of the data and new absolute calibra…

Optical Flares in the Luminous Fast Blue Optical Transient AT2022tsd ("Tasmanian Devil")
Rachid Ouyed (Department of Physics,Astronomy, University of Calgary, Alberta, Canada)
https://arxiv.org/abs/2506.20540

Optical Flares in the Luminous Fast Blue Optical Transient AT2022tsd ("Tasmanian Devil")
The delayed conversion of a neutron star (NS) into a highly magnetized hybrid star (HS) ejects ~ 0.01Msun of outer NS layers with kinetic energy ~ 10^50 erg (Keranen et al. 2005); the Quark-Nova (QN) ejecta. If this occurs in isolation (or after the SN ejecta had dissipated), the rotational energy of the HS powers a transient with rise and decay times of a few days, consistent with Luminous Fast Blue Optical Transients (LFBOTs) (Ouyed 2025). Breakup of the QN ejecta creates optically thin fragm…

Trump threatens to eviscerate NASA (Philip Plait/Bad Astronomy Newsletter)
https://badastronomy.beehiiv.com/p/trump-threatens-to-eviscerate-nasa-cb96
http://www.memeorandum.com/250602/p138#a250602p138

Gravitational-Wave Background from Extragalactic Double White Dwarfs for LISA
Guillaume Boileau, Tristan Bruel Alexandre Toubiana, Astrid Lamberts, Nelson Christensen
https://arxiv.org/abs/2506.18390

Gravitational-Wave Background from Extragalactic Double White Dwarfs for LISA
Recent studies have revealed the contribution of extragalactic DWD to the astrophysical SGWB could be detectable in the mHz regime by LISA. Conversely, the presence of this SGWB could hamper the detection of cosmological SGWB, which are one of the key targets of GW astronomy. We aim to confirm the spectrum of the extragalactic DWD SGWB and estimate its detectability with LISA under different assumptions. We also aim at understanding the main uncertainties in the spectrum and estimate if the sig…

Gender Imbalance in Physics Education and Employment in Germany: Trends and Challenges
Ruzin Aganoglu, Andrea Bossmann, Ulrike B\"ohm, Anja Metzelthin, Agnes Sandner, Iris Traulsen, Angelica Zacarias
https://arxiv.org/abs/2506.19021

Gender Imbalance in Physics Education and Employment in Germany: Trends and Challenges
Gender imbalance among German physicists persists, with fewer women in advanced degrees and research leadership roles. Although female enrollment in Physics programs increased slightly until 2022, potentially influenced by COVID-19 the long-term trend remains uncertain. Despite the rise in female Ph.D. students and foreign representation, female professors in Physics and Astronomy stagnated below 14 %, indicating significant underrepresentation. Anticipated revisions to the WissZeitVG law may i…

Astronomy as a strategic driver for sustainable development: #Astronomy for Development is to direct astronomy towards addressing urgent societal needs.

Astrotourism for Development: An Overview of Resources from the IAU Office of Astronomy for Development
Joyful E. Mdhluli, IAU Office of Astronomy for Development
https://arxiv.org/abs/2507.15827

Astrotourism for Development: An Overview of Resources from the IAU Office of Astronomy for Development
Astrotourism has emerged as a powerful cross sectoral tool to promote science education, sustainable economic development, and cultural exchange. Recognising its potential, the International Astronomical Union's Office of Astronomy for Development (IAU OAD) has developed a suite of openly accessible resources to support individuals and institutions interested in implementing astrotourism initiatives globally. These resources also encourage individuals and existing businesses to broaden their of…

Metallicities from High-Resolution TRES Spectra with The Payne and uberMS: Performance Benchmarks and Literature Comparison
Emily K. Pass, Phillip A. Cargile, Victoria DiTomasso, Romy Rodr\'iguez Mart\'inez, David Charbonneau, David W. Latham, Andrew Vanderburg, Allyson Bieryla, Samuel N. Quinn, Lars A. Buchhave
https://…

Metallicities from High-Resolution TRES Spectra with The Payne and uberMS: Performance Benchmarks and Literature Comparison
As the field of exoplanetary astronomy has matured, there has been growing demand for precise stellar abundances to probe subtle correlations between stellar compositions and planetary demographics. However, drawing population-level conclusions from the disparate measurements in the literature is challenging, with various groups measuring metallicities using bespoke codes with differing line lists, radiative transfer models, and other assumptions. Here we use the neural-net framework uberMS to …

Majorana Signatures in the Tripartite Uncertainty Relations with Quantum Memory
D. Maroulakos (Doctoral School at the University of Rzeszow), C. Jasiukiewicz (Department of Physics and Medical Engineering Rzeszow University of Technology), A. Wal (Institute of Physics Faculty of Exact and Technical Sciences University of Rzeszow), A. Sinner (Institute of Physics University of Opole), I. Weymann (Institute of Spintronics and Quantum Information Faculty of Physics and Astronomy A. Mickie…

Majorana Signatures in the Tripartite Uncertainty Relations with Quantum Memory
Quantumness imposes a fundamental limit on measurement accuracy. The paradigmatic cases are Heisenberg's uncertainty relation in the original formulation, Robertson's formulation, and improved uncertainty relations. However, the more universal measures are given in terms of quantum entropies. Uncertainties of measurements done on one quantum system correlated with another quantum system constitute a more intriguing question. Quantum correlations can influence the lower bound of uncertainties, a…

Cryogenic spin 3/2 nuclear quadrupole resonance: Spin relaxation and electric field gradient via Rabi frequency goniometry
Ritik R. Modi (Department of Physics and Astronomy, George Mason University, Fairfax, VA, USA), Karen L. Sauer (Department of Physics and Astronomy, George Mason University, Fairfax, VA, USA, Quantum Science and Engineering Center, George Mason University, Fairfax, VA, USA)

Cryogenic spin 3/2 nuclear quadrupole resonance: Spin relaxation and electric field gradient via Rabi frequency goniometry
A straightforward way to determine the electric field gradient $-$ principal axes frame (EFG-PAF) on single crystal samples with spin 3/2 nuclei is demonstrated. Nuclear quadrupole resonance (NQR) spectroscopy is used to determine the Rabi frequency for $^{35}$Cl in a single crystal of potassium chlorate (KClO$_3$) by comparing the NQR signal for powder and single crystal samples. By exploiting the geometrical dependence of the Rabi frequency with respect to the excitation direction, EFG-PAF is…

Sieste, jour 3. On va essayer de récupérer de la courte nuit (3h de sommeil) Toujours pas d'orage, on cuit en attendant.
#RAP2025 #Astrodon #StarParty

Expansion Signatures in 35 HII Regions traced by SOFIA [CII] Emission
Timothy Faerber, Loren D. Anderson, Matteo Luisi, Lars Bonne, Nicola Schneider, Volker Ossenkopf-Okada, Alexander Tielens, Robert Simon, Markus R\"ollig
https://arxiv.org/abs/2506.16700

Expansion Signatures in 35 HII Regions traced by SOFIA [CII] Emission
We analyze the expansion signatures of 35 HII regions mapped in [CII] 158 micron emission by the Stratospheric Observatory for Infrared Astronomy (SOFIA). The [CII] emission primarily traces photodissociation regions (PDRs) at the transition between ionized and neutral gas. The brightness and narrow linewidth of [C II] allow us to measure PDR expansion. Bubble-shaped regions often exhibit expansion, while irregular-shaped ones are less likely to. Of the 35 HII regions, 12 (~34%) exhibit clear e…

More slides about the 2028 Total #SolarEclipse from Terry Cuttle at the SEC - and about coming attractions down under. Relevant websites: https://eclipse.asa.astronomy.org.au/ and https://www.eclipse.aaq.org.au/ 16/n

New Determination of the $^{14}$C(n, $\gamma$)$^{15}$C Reaction Rate and Its Astrophysical Implications
Yuchen Jiang (China Institute of Atomic Energy, Beijing, China), Zhenyu He (School of Physics, International Research Center for Big-Bang Cosmology and Element Genesis, Peng Huanwu Collaborative Center for Research and Education, Beihang University, Beijing, China), Yudong Luo (School of Physics, Peking University, and Kavli Institute for Astronomy and Astrophysics, Peking University…

New Determination of the $^{14}$C(n, $γ$)$^{15}$C Reaction Rate and Its Astrophysical Implications
We present a novel experiment to investigate the spectroscopic factor of the $^{15}$C ground state for the first time using single-neutron $removal$ transfer reactions on $^{15}$C. Two consistent spectroscopic factors were derived from the (p, d) and (d, t) reactions, which were subsequently used to deduce the $^{14}$C(n, $γ$)$^{15}$C reaction cross section and the corresponding stellar reaction rate. A typical cross section of (3.89 $\pm$ 0.76) $μ$b is determined at $E_\mathrm{_{c.m.}}$ = 23…

Replaced article(s) found for cs.DL. https://arxiv.org/list/cs.DL/new
[1/1]:
- OntoPortal-Astro, a Semantic Artefact Catalogue for Astronomy
Cecconi, Debisschop, Derri\`ere, Louys, Corre, Grau, Jonquet

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

Spectral analysis of HD 49798, a bright, hydrogen-deficient sdO-type donor star in an accreting X-ray binary
Thomas Rauch (Institute for Astronomy and Astrophysics, Eberhard Karls University, Tuebingen, Germany), Paul Strau{\ss} (Institute for Astronomy and Astrophysics, Eberhard Karls University, Tuebingen, Germany)
https://arx…

Spectral analysis of HD 49798, a bright, hydrogen-deficient sdO-type donor star in an accreting X-ray binary
Context: HD 49798 is a bright ($m_{\rm V} = 8.287$), hot (effective temperature $T_{\rm eff} = 45000$ K) subdwarf star of the spectral type O (sdO). It is the only confirmed sdO-type mass-donor star of an X-ray binary that has a high-mass (1.28 $M_\odot$) white-dwarf or neutron-star primary with a spin period of only 13.2 s. Aims: Since a high-quality spectrum of HD 49798, obtained with the Tübingen Ultraviolet Echelle Spectrometer (TUES), that has never been analyzed before is available in th…

High Dimensional Beam Inference II: Inference of a Perturbed HERA Beam from Simulated Visibility Data
Michael J. Wilensky, Philip Bull, Nicolas Fagnoni
https://arxiv.org/abs/2506.20712

High Dimensional Beam Inference II: Inference of a Perturbed HERA Beam from Simulated Visibility Data
Accurate beam modeling is important in many radio astronomy applications. In this paper, we focus on beam modeling for 21-cm intensity mapping experiments using radio interferometers, though the techniques also apply to single dish experiments with small modifications. In 21-cm intensity mapping, beam models are usually determined from highly detailed electromagnetic simulations of the receiver system. However, these simulations are expensive, and therefore have limited ability to describe prac…

On the use and interpretation of signal-model indistinguishability measures for gravitational-wave astronomy
Jonathan E. Thompson, Charlie Hoy, Edward Fauchon-Jones, Mark Hannam
https://arxiv.org/abs/2506.10530

On the use and interpretation of signal-model indistinguishability measures for gravitational-wave astronomy
The difference ("mismatch") between two gravitational-wave (GW) signals is often used to estimate the signal-to-noise ratio (SNR) at which they will be distinguishable in a measurement or, alternatively, when the errors in a signal model will lead to biased measurements. It is well known that the standard approach to calculate this "indistinguishability SNR" is too conservative: a model may fail the criterion at a given SNR, but not necessarily incur a biased measurement of any individual param…

"Patricia #Espenak announced in an email that Fred passed away yesterday afternoon," Michael Zeiler just wrote on the Solar Eclipse Mailing List: "Fred was in hospice at their home in Portal, Arizona. Pat was holding his hand when he passed away and is devastated.
Fred had an extremely consequential life and was a giant in the solar eclipse community. Let‘s remember his enthusiasm for nature‘s greatest spectacle, his warm friendship to many of us, his generosity in sharing his knowledge, and his impact on all of us."
Obituaries: https://skyandtelescope.org/astronomy-news/fred-espenak-1953-2025/ and https://www.astronomy.com/observing/fred-espenak-dies-at-71/

Biexciton-polariton coupling mediated by dark states
Giuseppe Fumero (Associate, Nanoscale Device Characterization Division, National Institute of Standards and Technology, Gaithersburg, MD, USA, Department of Physics and Astronomy, West Virginia University, Morgantown, WV, USA), Jagannath Paul (Associate, Nanoscale Device Characterization Division, National Institute of Standards and Technology, Gaithersburg, MD, USA, Department of Physics and Astronomy, West Virginia University, Morg…

Biexciton-polariton coupling mediated by dark states
Multi-exciton correlations shape the photo-induced response of nanostructured materials, particularly when interactions are enhanced by light confinement. Here multidimensional coherent spectroscopy is used to quantify biexciton and exciton-polariton dynamics in a semiconductor microcavity. One- and two-quantum spectra, which are dominated by polariton-related contributions, also include a polarization-dependent biexciton feature whose magnitude and spectral coordinates depend on the detuning b…

The Global Cosmic Ray Observatory -- Challenging next-generation multi-messenger astronomy with interdisciplinary research
Toshihiro Fujii (on behalf of the GCOS supporters)
https://arxiv.org/abs/2507.04588

The Global Cosmic Ray Observatory -- Challenging next-generation multi-messenger astronomy with interdisciplinary research
The origin of ultra-high-energy cosmic rays (UHECRs) is one of the most intriguing mysteries in astroparticle physics and high-energy physics. Since UHECRs with light mass compositions are less deflected by the Galactic and extragalactic magnetic fields, their arrival directions are more strongly correlated with their origins. Charged-particle astronomy with UHECRs is hence a potentially viable probe of extremely energetic phenomena in the universe. The Global Cosmic Ray Observatory (GCOS) is a…

Breakthrough Listen: A Technosignature Search Around 27 Eclipsing Exoplanets Selected from the Transiting Exoplanet Survey Satellite Catalogue
R. Barrett (University of Southern Queensland), C. D. Tremblay (SETI Institute, CSIRO Astronomy and Space Science), B. Addison (University of Southern Queensland Centre for Astrophysics, Swinburne University of Technology Centre for Astrophysics and Supercomputing), D. C. Price (International Centre for Radio Astronomy Research, SKA Observatory …

Breakthrough Listen: A Technosignature Search Around 27 Eclipsing Exoplanets Selected from the Transiting Exoplanet Survey Satellite Catalogue
Here we analyse the archival data for a set of 27 Transiting Exoplanet Survey Satellite (TESS) Targets of Interest (TOIs) in search for artificially generated radio signals, or 'technosignatures', interrupted by occultation. Exoplanetary eclipses are notable events to observe in the search for technosignatures, as they mark the geometrical alignment of the target, its host star, and Earth. During an eclipse event, any signal emanating from the target of interest should cease for the duration of…

Synthesizer: Synthetic Observables For Modern Astronomy
Will J. Roper, Christopher Lovell, Aswin Vijayan, Stephen Wilkins, Hollis Akins, Sabrina Berger, Connor Sant Fournier, Thomas Harvey, Kartheik Iyer, Marco Leonardi, Sophie Newman, Borja Pautasso, Ashley Perry, Louise Seeyave, Laura Sommovigo
https://arxiv.org/abs/2506.15811…

Synthesizer: Synthetic Observables For Modern Astronomy
Synthesizer is a fast, flexible, modular, and extensible Python package that empowers astronomers to turn theoretical galaxy models into realistic synthetic observations - including spectra, photometry, images, and spectral cubes - with a focus on interchangeable modelling assumptions. By offloading computationally intensive tasks to threaded C++ extensions, Synthesizer delivers both simplicity and speed, enabling rapid forward-modelling workflows without requiring users to manage low-level dat…

Total Power and Low-energy Cut-off Time Evolution of Solar Flare Accelerated Electrons Using X-Ray Observations and Warm-Target Model
Debesh Bhattacharjee (School of Physics & Astronomy, University of Glasgow, Glasgow, UK), Eduard P. Kontar (School of Physics & Astronomy, University of Glasgow, Glasgow, UK), Yingjie Luo (School of Physics & Astronomy, University of Glasgow, Glasgow, UK)

Total Power and Low-energy Cut-off Time Evolution of Solar Flare Accelerated Electrons Using X-Ray Observations and Warm-Target Model
A primary characteristic of solar flares is the efficient acceleration of electrons to nonthermal deka-keV energies. While hard X-Ray (HXR) observation of bremsstrahlung emission serves as the key diagnostic of these electrons. In this study, we investigate the time evolution of flare-accelerated electrons using the warm-target model. This model, unlike the commonly used cold-target model, can determine the low-energy cut-off in the nonthermal electron distribution, so that the energetics of no…

❄️ Did it rain or snow on ancient Mars? New study suggests it did
#mars

Did it rain or snow on ancient Mars? New study suggests it did
Visit ancient Mars—a surprisingly temperate planet where snow or rain falls from the sky, and rivers rush down valleys to feed hundreds of lakes.

Inferring Obscured Cosmic Black Hole Accretion History from AGN Found by JWST/MIRI CEERS Survey
C. -A. Hsieh (Department of Physics, National Taiwan University), T. Goto (Institute of Astronomy, National Tsing Hua University, Department of Physics, National Tsing Hua University), C. -T. Ling (Institute of Astronomy, National Tsing Hua University), S. J. Kim (Institute of Astronomy, National Tsing Hua University), T. Hashimoto (Department of Physics, National Chung Hsing University), T.…

Inferring Obscured Cosmic Black Hole Accretion History from AGN Found by JWST/MIRI CEERS Survey
This study presents the black hole accretion history (BHAH) of obscured active galactic nuclei (AGNs) identified from the JWST CEERS survey by Chien et al. (2024) using mid-infrared (MIR) SED fitting. We compute black hole accretion rates (BHARs) to estimate the black hole accretion density (BHAD), $ρ_{L_{\mathrm{disk}}}$, across $0 < z < 4.25$. MIR luminosity functions (LFs) are also constructed for these sources, modeled with modified Schechter and double power law forms, and corresponding B…

Calibrating the photometric performance of a high-time-resolution photon-counting imager for optical astronomy
Mana Hasebe, Takeshi Nakamori, Kazuaki Hashiyama, Anju Sato, Miu Maeshiro, Rin Sato, Masayoshi Shoji, Masaru Kino, Dai Takei, Tomohiro Sato, Kazuki Ueno
https://arxiv.org/abs/2506.16025

Calibrating the photometric performance of a high-time-resolution photon-counting imager for optical astronomy
Optical observations with high time resolution are essential for understanding the origin of sub-millisecond timescale astronomical phenomena, including giant radio pulses from the Crab Pulsar. We have developed a high-speed imaging system called the Imager of MPPC-based Optical photoN counter from Yamagata (IMONY). The system uses a customized Multi-Pixel Photon Counter (MPPC), which independently reads out signals from all $8\times8$ pixels and functions as an imager based on a Geiger-mode av…

Exoplanet Classification through Vision Transformers with Temporal Image Analysis
Anupma Choudhary, Sohith Bandari, B. S. Kushvah, C. Swastik
https://arxiv.org/abs/2506.16597

Exoplanet Classification through Vision Transformers with Temporal Image Analysis
The classification of exoplanets has been a longstanding challenge in astronomy, requiring significant computational and observational resources. Traditional methods demand substantial effort, time, and cost, highlighting the need for advanced machine learning techniques to enhance classification efficiency. In this study, we propose a methodology that transforms raw light curve data from NASA's Kepler mission into Gramian Angular Fields (GAFs) and Recurrence Plots (RPs) using the Gramian Angul…

Radiative Transfer Modeling of Stripped-Envelope Supernovae. I: A Grid for Ejecta Parameter Inference
S. Karthik Yadavalli (Center for Astrophysics | Harvard and Smithsonian), V. Ashley Villar (Center for Astrophysics | Harvard and Smithsonian, The NSF AI Institute for Artificial Intelligence and Fundamental Interactions), Abigail Polin (Department of Physics and Astronomy, Purdue University), S. E. Woosley (Department of Astronomy and Astrophysics, University of California, Santa Cruz…

Radiative Transfer Modeling of Stripped-Envelope Supernovae. I: A Grid for Ejecta Parameter Inference
We present 1,800 multiwavelength Type Ib/c supernovae light curve models obtained by running the radiation transport code Sedona and varying the mass distribution, velocity profile, and abundance ejecta profiles of helium star progenitors. To create a flexible but physically-informed grid, we use autoencoders to construct a representation of ejecta profiles derived from stellar evolution models. We present simulated nearest-neighbor multiband light curves matches to SN 1994I, SN 2007gr, and iPT…

Electrically reconfigurable extended lasing state in an organic liquid-crystal microcavity
Dmitriy Dovzhenko (School of Physics and Astronomy, University of Southampton, Southampton, United Kingdom), Luciano Siliano Ricco (Science Institute, University of Iceland, Reykjavik, Iceland), Krzysztof Sawicki (School of Physics and Astronomy, University of Southampton, Southampton, United Kingdom), Marcin Muszy\'nski (Institute of Experimental Physics, Faculty of Physics, University of Wa…

Electrically reconfigurable extended lasing state in an organic liquid-crystal microcavity
Small-footprint, low-power arrays of coupled coherent emitters with the capability of near- and far-field engineering and coherence control are highly sought after to meet modern nanophotonics evolving needs. Between existing solutions based on vertical-cavity surface-emitting lasers, phase masks in bulk traditional cavity-based systems, and lattices of exciton-polariton condensates, only the strongly light-matter coupled systems were shown to be capable of controlled on-chip interaction betwee…

Recent advances on multimessenger astrophysics: Centaurus A, GW 170817, and KM3-230213A
Cain\~a de Oliveira, Vitor de Souza
https://arxiv.org/abs/2507.16392

Recent advances on multimessenger astrophysics: Centaurus A, GW 170817, and KM3-230213A
We review recent advances in multimessenger astrophysics, with particular emphasis on Centaurus A and on two pivotal events: the gravitational-wave detection GW 170817 and the ultra-high-energy neutrino KM3-230213A. Centaurus A is the prototype multimessenger source. The GW 170817 event, arising from a binary neutron star merger, marked a transformative moment in astronomy through the joint observation of gravitational waves and a broad spectrum of electromagnetic signals. The KM3-230213A neutr…

Comparing astrophysical models to gravitational-wave data in the observable space
Alexandre Toubiana, Davide Gerosa, Matthew Mould, Stefano Rinaldi, Manuel Arca Sedda, Tristan Bruel, Riccardo Buscicchio, Jonathan Gair, Lavinia Paiella, Filippo Santoliquido, Rodrigo Tenorio, Cristiano Ugolini
https://arxiv.org/abs/2507.13249

Comparing astrophysical models to gravitational-wave data in the observable space
Comparing population-synthesis models to the results of hierarchical Bayesian inference in gravitational-wave astronomy requires a careful understanding of the domain of validity of the models fitted to data. This comparison is usually done using the inferred astrophysical distribution: from the data that were collected, one deconvolves selection effects to reconstruct the generating population distribution. In this letter, we demonstrate the benefits of instead comparing observable populations…

Statistical Machine Learning for Astronomy -- A Textbook
Yuan-Sen Ting
https://arxiv.org/abs/2506.12230 https://arxiv.org/pdf/2506.12…

Statistical Machine Learning for Astronomy -- A Textbook
This textbook provides a systematic treatment of statistical machine learning for astronomical research through the lens of Bayesian inference, developing a unified framework that reveals connections between modern data analysis techniques and traditional statistical methods. We show how these techniques emerge from familiar statistical foundations. The consistently Bayesian perspective prioritizes uncertainty quantification and statistical rigor essential for scientific inference in astronomy.…

Yay, the German math and astronomy wizard Erhard Weigel - see #SolarEclipse map by Michael Zeiler during the final SEC talk, and it's already a pretty modern and clever one! 8/n - more tomorrow.

Sunset in Bochum, Germany, today, with some sunspots (see https://x.com/joe_stalder/status/1945915214794211795 for daytime views) - with the falling declination the sunset point has moved so much to the left that the Sun ist hard to get from my roof top right now; I have to bend over with a vengeance to the left or right to shoot past a big obstruction. Astronomy athletics ...

THOR: a GPU-accelerated and MPI-parallel radiative transfer code
Chris Byrohl, Dylan Nelson
https://arxiv.org/abs/2507.11603 https://…

THOR: a GPU-accelerated and MPI-parallel radiative transfer code
Emission and absorption line features are important diagnostics for the physics underlying extragalactic astronomy. The interpretation of observed signatures involves comparing against forward modeled spectra from galaxy formation simulations as well as more simplified geometries, while including the complex scattering radiative transfer (RT) of resonant emission lines. Here, we present thor, a modern C++ radiative transfer code focused initially on resonant emission lines. thor is a high-perfo…

Using gravitational waves and multi-messenger Astronomy to reverse-engineer the properties of galactic nuclei
K. E. Saavik Ford, Barry McKernan
https://arxiv.org/abs/2506.08801

Using gravitational waves and multi-messenger Astronomy to reverse-engineer the properties of galactic nuclei
Active galactic nuclei (AGN) are powered by accretion disks onto supermassive black holes in the the centers of galaxies. AGN are believed to play important roles in the evolution of both supermassive black holes and their host galaxies over cosmic time. AGN and the nuclear star clusters (NSCs) that interact with them remain unresolved with present and planned telescopes. As a result, the properties of AGN and NSCs are highly uncertain. Here we review how binary black hole (BBH) mergers can occ…

Insights from a 30-Year international Partnership on Astronomical Archives
David R. Rodriguez, Maria Arevalo, Patrick Dowler, Javier Espinosa, Brian McLean, Chris Willott
https://arxiv.org/abs/2506.11888

Insights from a 30-Year international Partnership on Astronomical Archives
In an era where astronomical data is expanding at an unprecedented rate, the importance of data sharing and accessibility among astronomy archives cannot be overstated. Since the 1990s, an international partnership between the Space Telescope Science Institute (STScI), the European Space Astronomy Centre (ESAC), and the Canadian Astronomy Data Centre (CADC) has been focused on this endeavor, facilitating the exchange of data from the Hubble and James Webb Space Telescopes. We will present how…

Faced with the growing risk that #LightPollution represents for the development of astronomy in Chile, international observatories with a presence in the country have formed a joint organization dedicated to protecting the dark skies of northern Chile: https://giantmagellan.org/2025/06/03/dark-skies-council-international-astronomical-observatories-join-forces-to-protect-chiles-skies/ - the Association of Universities for Research in Astronomy (AURA), the Giant Magellan Telescope, the European Southern Observatory (ESO) and Carnegie Science’s Las Campanas Observatory (LCO), signed an agreement to create the Dark Skies Council; through this alliance, the institutions will work in a coordinated manner to protect Chile’s privileged skies.

Recent Advances in Simulation-based Inference for Gravitational Wave Data Analysis
Bo Liang, He Wang
https://arxiv.org/abs/2507.11192 https://

Recent Advances in Simulation-based Inference for Gravitational Wave Data Analysis
The detection of gravitational waves by the LIGO-Virgo-KAGRA collaboration has ushered in a new era of observational astronomy, emphasizing the need for rapid and detailed parameter estimation and population-level analyses. Traditional Bayesian inference methods, particularly Markov chain Monte Carlo, face significant computational challenges when dealing with the high-dimensional parameter spaces and complex noise characteristics inherent in gravitational wave data. This review examines the em…

Unlocking the hidden potential of pulsar astronomy
D. Kaur, G. Hobbs, A. Zic, J. R. Dawson, J. Morgan, W. Ling, S. Camtepe, J. Pieprzyk, M. C. M. Cheung
https://arxiv.org/abs/2506.08056

Unlocking the hidden potential of pulsar astronomy
Pulsars have traditionally been used for research into fundamental physics and astronomy. In this paper, we investigate the expanding applications of radio pulsars in societal and industrial domains beyond their conventional scientific roles. We describe emerging applications in positioning, navigation, timing and synchronization, random number generation, space weather monitoring, public engagement, antenna calibration techniques, and leveraging extensive pulsar data sets generated by large-sc…

Some U.S. astronomy is still alive ... the first of five press conferences from the #AAS246 meeting in Alaska is now streaming on https://www.youtube.com/watch?v=K6sPNlpIurg - see https://aas.org/meetings/aas246/press-kit#Mon_am for the topics.

Galactic Science -- Rapporteur Talk of the 8th Heidelberg International Symposium on High Energy Gamma Ray Astronomy
Sandro Mereghetti (INAF, IASF-Milano)
https://arxiv.org/abs/2506.04729

Galactic Science -- Rapporteur Talk of the 8th Heidelberg International Symposium on High Energy Gamma Ray Astronomy
The most recent observational and theoretical results in the rapidly expanding field of high-energy gamma-ray astrophysics were discussed at the international conference ``Gamma-2024'' that took place in Milano in September 2024. This contribution summarises the 'rapporteur talk' relative to the Galactic science given at the end of the conference.

This https://arxiv.org/abs/2412.09699 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Neutrinos from explosive transients at the dawn of multi-messenger astronomy
With the advent of time-domain astronomy and the game-changing next generation of telescopes, we have unprecedented opportunities to explore the most energetic events in our Universe through electromagnetic radiation, gravitational waves, and neutrinos. These are elementary particles, which exist in three different flavors and change the latter as they propagate in the dense core of astrophysical sources as well as en route to Earth. To capitalize on existing and upcoming multi-messenger opport…

easyspec: An open-source Python package for long-slit spectroscopy
Raniere de Menezes, Francesco Massaro, Michela Negro, Claudia M. Raiteri, Harold Pe\~na-Herazo, Jose A. Acosta-Pulido
https://arxiv.org/abs/2507.13443

easyspec: An open-source Python package for long-slit spectroscopy
In modern-day astronomy, near-infrared, optical, and ultraviolet spectroscopy are indispensable for studying a wide range of phenomena, from measuring black hole masses to analyzing chemical abundances in stellar atmospheres. However, spectroscopic data reduction is often performed using instrument-specific pipelines or legacy software well-established and robust within the community that are often challenging to implement and script in modern astrophysical workflows. In this work, we introduce…

The Growing Impact of Unintended #Starlink Broadband Emission on Radio Astronomy in the SKA-Low Frequency Range: https://arxiv.org/abs/2506.02831 -> "We report 112,534 individual detections of 1,806 unique Starlink satellites, some emitting broadband emission and others narrowband emission. [...] It is shown that in the worst cases, some datasets have a detectable Starlink satellite in ~30% of all images acquired. Emission from Starlink satellites is detected in primary and secondary frequency ranges protected by the International Telecommunication Union".

Science Prospects for the Southern Wide-field Gamma-ray Observatory: SWGO
SWGO Collaboration, et al.
https://arxiv.org/abs/2506.01786 https://

Science Prospects for the Southern Wide-field Gamma-ray Observatory: SWGO
Ground-based gamma-ray astronomy is now well established as a key observational approach to address critical topics at the frontiers of astroparticle physics and high-energy astrophysics. Whilst the field of TeV astronomy was once dominated by arrays of atmospheric Cherenkov Telescopes, ground-level particle detection has now been demonstrated to be an equally viable and strongly complementary approach. Ground-level particle detection provides continuous monitoring of the overhead sky, critical…

Efficacy of Galaxy Catalogues for following up gravitational wave events
Tamojeet Roychowdhury, Harsh Choudhary, Varun Bhalerao, David O. Cook, Viraj Karambelkar, Mansi M. Kasliwal, Harsh Kumar, Surhud More, Gaurav Waratkar
https://arxiv.org/abs/2507.11635

Efficacy of Galaxy Catalogues for following up gravitational wave events
The detection of gravitational waves (GW) by the LIGO-Virgo-KAGRA (LVK) network has opened up a new era in astrophysics. The identification of the electromagnetic counterparts of GW sources is crucial for multi-messenger astronomy, one way of which is to use galaxy catalogues to guide optical follow-up observations. In this paper, we test the utility of galaxy-targeted approach with mass prioritised galaxy ranking for the ongoing LIGO O4 run. We have used the simulated results for the expected …

Evidence of haze control of Pluto’s atmospheric heat balance from JWST/MIRI thermal light curves: #Pluto

Data Movement Model for the Vera C. Rubin Observatory
Fabio Hernandez (CC-IN2P3/CNRS), Mark G. Beckett (Institute for Astronomy, University of Edinburgh), Andrew Hanushevsky (SLAC National Accelerator Laboratory), Tim Jenness (Vera C. Rubin Observatory Project Office), Kian-Tat Lim (SLAC National Accelerator Laboratory), Peter Love (Lancaster University), Timothy Noble (Rutherford Appleton Laboratory, Science and Technology Facilities Council), Stephen R. Pietrowicz (National Center fo…

Data Movement Model for the Vera C. Rubin Observatory
The sky images captured nightly by the camera on the Vera C. Rubin Observatory's telescope will be processed across facilities on three continents. Data acquisition will occur at the observatory's location on Cerro Pachón in the Andes mountains of Chile. A first copy of the raw image data set is stored at the summit and immediately transmitted via dedicated network links to the archive center within the US Data Facility at SLAC National Accelerator Laboratory in California, USA and from there …

Low-latency neutrino follow-up combining diverse IceCube selections
Christoph Raab (for the IceCube Collaboration), Sam Hori (for the IceCube Collaboration), Steve Sclafani (for the IceCube Collaboration), Jessie Thwaites (for the IceCube Collaboration)
https://arxiv.org/abs/2507.08748

Low-latency neutrino follow-up combining diverse IceCube selections
Neutrino observations are crucial for multi-messenger astronomy, but currently limited by effective area and atmospheric background. However, while other telescopes must point their limited field of view, IceCube can perform full-sky realtime follow-up of astrophysical transient sources with high uptime. For this, IceCube uses its Fast Response Analysis (FRA), which can provide results from an unbinned maximum likelihood analysis within tens of minutes of an astrophysical transient. Besides man…

SAS in ESA Datalabs: A New Platform for XMM-Newton Analysis
Esin G. Gulbahar, Camille M. Diez, Aitor Ibarra, Ivan Valtchanov, Richard Saxton, Ignacio de la Calle Perez, Jose Lopez-Miralles, Alejandro Gonzalez Ganzabal, Peter Kretschmar
https://arxiv.org/abs/2506.14444

SAS in ESA Datalabs: A New Platform for XMM-Newton Analysis
XMM-Newton is a cornerstone mission of the European Space Agency (ESA) for X-ray astronomy, providing high-quality X-ray data for astrophysical research since the start of the century. Its Science Analysis System (SAS) has been a reliable data reduction and analysis software, evolving throughout the years to meet changing user needs, while incorporating new methods. This paper presents the XMM-SAS Datalab, a tool within the cloud-based ESA Datalabs platform, designed to enhance the interactivit…

Prospects for sub-GeV astrophysical neutrino detection with IceCube
Per Arne Sevle Myhr (for the IceCube Collaboration), Gwenha\"el de Wasseige (for the IceCube Collaboration)
https://arxiv.org/abs/2507.08569

Prospects for sub-GeV astrophysical neutrino detection with IceCube
The IceCube Neutrino Observatory is currently the largest and most sensitive detector for astrophysical neutrinos and has pioneered the field of high-energy neutrino astronomy. Despite being designed with the primary goal of identifying astrophysical TeV neutrinos and their corresponding sources, recent studies, utilising the DeepCore subdetector, have shown IceCube's proficiency in being sensitive to astrophysical neutrinos at GeV energies. Currently, there is a gap in sensitivity between the …

A thermonuclear supernova interacting with hydrogen- and helium-deficient circumstellar material. SN 2020aeuh as a SN Ia-CSM-C/O?
K. Tsalapatas, J. Sollerman, R. Chiba, E. Kool, J. Johansson, S. Rosswog, S. Schulze, T. J. Moriya, I. Andreoni, T. G. Brink, T. X. Chen, S. Covarrubias, K. De, G. Dimitriadis, A. V. Filippenko, C. Fremling, A. Gangopadhyay, K. Maguire, G. Mo, Y. Sharma, N. Sravan, J. H. Terwel, Y. Yang

A thermonuclear supernova interacting with hydrogen- and helium-deficient circumstellar material. SN 2020aeuh as a SN Ia-CSM-C/O?
Identifying the progenitors of thermonuclear supernovae (Type Ia supernovae; SNe Ia) remains a key objective in contemporary astronomy. The rare subclass of SNe Ia that interacts with circumstellar material (Type Ia-CSM) allows for studies of the progenitor's environment before explosion, and generally favours single-degenerate progenitor channels. The case of SN Ia-CSM PTF11kx clearly connected thermonuclear explosions with hydrogen-rich CSM-interacting events, and the more recent SN 2020eyj c…

Mapping Diffuse Radio Sources Using TUNA: A Transformer-Based Deep Learning Approach
Nicoletta Sanvitale, Claudio Gheller, Franco Vazza, Annalisa Bonafede, Virginia Cuciti, Emanuele De Rubeis, Federica Govoni, Matteo Murgia, Valentina Vacca
https://arxiv.org/abs/2507.11320

Mapping Diffuse Radio Sources Using TUNA: A Transformer-Based Deep Learning Approach
Vision Transformers are used via a customized TransUNet architecture, which is a hybrid model combining Transformers into a U-Net backbone, to achieve precise, automated, and fast segmentation of radio astronomy data affected by calibration and imaging artifacts, addressing the identification of faint, diffuse radio sources. Trained on mock radio observations from numerical simulations, the network is applied to the LOFAR Two-meter Sky Survey data. It is then evaluated on key use cases, specifi…

Beyond the Clouds: Advanced Data Analysis of a Dutch Sky Quality Meter Network
Farhan R. Shah (Kapteyn Astronomical Institute, University of Groningen, Groningen, The Netherlands), Reynier F. Peletier (Kapteyn Astronomical Institute, University of Groningen, Groningen, The Netherlands), Jake Noel-Storr (Access Astronomy), Dirk van der Geest (Kapteyn Astronomical Institute, University of Groningen, Groningen, The Netherlands), Theo Jurriens (Science LinX, Faculty of Science and Engineer…

Beyond the Clouds: Advanced Data Analysis of a Dutch Sky Quality Meter Network
Light pollution is an increasing environmental concern, impacting both ecological systems and human health. This report presents an analysis of light pollution data from the \textit{Was het donker} SQM network from 2020 until 2023, with a focus on indirect light pollution, commonly known as skyglow. By integrating measurements from Sky Quality Meter (SQM) stations in the network and cloud cover data from EUMETSAT, we conducted a comprehensive analysis of night sky brightness across a region enc…

On-axis afocal telescopes as framework for Cubesat based astronomical imagers and slit-less spectrographs
Anwesh Kumar Mishra, Gourav Banerjee, Rekhesh Mohan, Maheswar Gopinathan
https://arxiv.org/abs/2507.08323

On-axis afocal telescopes as framework for Cubesat based astronomical imagers and slit-less spectrographs
Cubesats present unique opportunities for observational astronomy in the modern era. They are useful in observing difficult-to-access wavelength regions and long-term monitoring of interesting astronomical sources. However, conventional telescope designs are not necessarily the best fit for restricted envelope of a Cubesat. Additionally, fine-pointing stability on these platforms is difficult due to the low mass of the spacecraft and special allocations within the optical design are needed to a…