#dwarfgalaxies — Public Fediverse posts

New in the #VirtualObservatory: “INT monitoring of Local Grp. VII. IC 10 photometry” by Gholami M. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/170/54
#LocalGroup #VariableStars #DwarfGalaxies #Photometry

Weekly Update from the Open Journal of Astrophysics – 16/05/2026

It’s Saturday once again, so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further five papers, bringing the number in Volume 9 (2026) to 104 and the total so far published by OJAp up to 552. It took us until late July to pass 100 last year.

I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter (which nobody should be using); these announcements also show the DOI for each paper.

The first paper to report this week, published on Monday 11th May in the folder High-Energy Astrophysical Phenomena is “Triaxial magnetars as sources of fast radio bursts” by Jonathan I Katz (Washington University, USA). This paper suggests that the mysterious properties of Fast Radio Bursts (FRB) could be explained by triaxial magnetars, with their activity levels influenced by precessional time scales.

The overlay for this paper is here

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:

https://fediscience.org/@OJ_Astro/116554775791392800

The second paper for this week, published on Tuesday 12th May in the folder Astrophysics of Galaxies, is “The Abundance of Thin Dwarf Galaxies: a Challenge for Cosmological Simulations” by Jose Benavides & Laura V. Sales (UC Riverside, USA), Julio F. Navarro (U. Victoria, Canada), Simon D. M. White (MPA Garching, Germany), and Carlos S. Frenk, Kyle A. Oman & Shaun Cole (U. Durham, UK). Depending on mass up to 40% of galaxies are intrinsically flat, a fraction that numerical models of galaxy formation struggle to reproduce suggesting the models are incomplete.

The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/116560106342500157

Next one up, the third paper of the week, also published on Tuesday 12th May but in the folder Cosmology and Nongalactic Astrophysics is “Cosmological peculiar velocities in general relativity” by Chris Clarkson (Queen Mary, University of London, UK) and Roy Maartens (U. Western Cape, South Africa). This paper refutes claims that the 1+3 covariant approach to cosmological perturbation theory predicts stronger growth of galaxy peculiar velocities, arguing that standard treatments are correct and fully relativistic.

The overlay for this one is here:

The final, accepted version can be found on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116560224426499932

The fourth paper this week, published on Wednesday May 13th “Possible evidence for a pair-instability supernova nature of ultra-early JWST sources” by Andrea Ferrara & Stefano Carniani (Scuola Normale Superiore, Pisa, Italy), Takahiro Morishita (California Institute of Technology, USA), and Massimo Stiavelli (Space Telescope Science Institute, USA). Published in the section Astrophysics of Galaxies. This paper argues that recent observations challenge early galaxy formation models, suggesting that the bright source, Capotauro, could be a supernova from a massive, metal-free star, not a luminous galaxy as initially thought.

The overlay is here:

The officially accepted version can be found on arXiv here and here is the Mastodon announcement:

https://fediscience.org/@OJ_Astro/116566147448743997

The fifth and final article of this week was also published on Wednesday 13th May but in the folder Cosmology and Nongalactic Astrophysics. The title is “Evolving and interacting dark energy: photometric and spectroscopic synergy with DES Y3 and DESI DR2” and it is by Maria Tsedrik and Benjamin Bose (University of Edinburgh, UK). The study investigates the Dark Scattering interacting dark energy scenario, using data from various sources. Results show no evidence of dark-sector interaction and a preference for the Chevallier-Polarski-Linder parametrisation.

The overlay is here:

You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:

https://fediscience.org/@OJ_Astro/116566165139100860

And that concludes this week’s update. I’ll do another next Saturday.

Weekly Update from the Open Journal of Astrophysics – 16/05/2026

It’s Saturday once again, so time for another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further five papers, bringing the number in Volume 9 (2026) to 104 and the total so far published by OJAp up to 552. It took us until late July to pass 100 last year.

I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter (which nobody should be using); these announcements also show the DOI for each paper.

The first paper to report this week, published on Monday 11th May in the folder High-Energy Astrophysical Phenomena is “Triaxial magnetars as sources of fast radio bursts” by Jonathan I Katz (Washington University, USA). This paper suggests that the mysterious properties of Fast Radio Bursts (FRB) could be explained by triaxial magnetars, with their activity levels influenced by precessional time scales.

The overlay for this paper is here

You can find the officially accepted version on arXiv here and the announcement on Fediverse here:

https://fediscience.org/@OJ_Astro/116554775791392800

The second paper for this week, published on Tuesday 12th May in the folder Astrophysics of Galaxies, is “The Abundance of Thin Dwarf Galaxies: a Challenge for Cosmological Simulations” by Jose Benavides & Laura V. Sales (UC Riverside, USA), Julio F. Navarro (U. Victoria, Canada), Simon D. M. White (MPA Garching, Germany), and Carlos S. Frenk, Kyle A. Oman & Shaun Cole (U. Durham, UK). Depending on mass up to 40% of galaxies are intrinsically flat, a fraction that numerical models of galaxy formation struggle to reproduce suggesting the models are incomplete.

The overlay for this one is here:

The official version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/116560106342500157

Next one up, the third paper of the week, also published on Tuesday 12th May but in the folder Cosmology and Nongalactic Astrophysics is “Cosmological peculiar velocities in general relativity” by Chris Clarkson (Queen Mary, University of London, UK) and Roy Maartens (U. Western Cape, South Africa). This paper refutes claims that the 1+3 covariant approach to cosmological perturbation theory predicts stronger growth of galaxy peculiar velocities, arguing that standard treatments are correct and fully relativistic.

The overlay for this one is here:

The final, accepted version can be found on arXiv here and the Mastodon announcement is here:

https://fediscience.org/@OJ_Astro/116560224426499932

The fourth paper this week, published on Wednesday May 13th “Possible evidence for a pair-instability supernova nature of ultra-early JWST sources” by Andrea Ferrara & Stefano Carniani (Scuola Normale Superiore, Pisa, Italy), Takahiro Morishita (California Institute of Technology, USA), and Massimo Stiavelli (Space Telescope Science Institute, USA). Published in the section Astrophysics of Galaxies. This paper argues that recent observations challenge early galaxy formation models, suggesting that the bright source, Capotauro, could be a supernova from a massive, metal-free star, not a luminous galaxy as initially thought.

The overlay is here:

The officially accepted version can be found on arXiv here and here is the Mastodon announcement:

https://fediscience.org/@OJ_Astro/116566147448743997

The fifth and final article of this week was also published on Wednesday 13th May but in the folder Cosmology and Nongalactic Astrophysics. The title is “Evolving and interacting dark energy: photometric and spectroscopic synergy with DES Y3 and DESI DR2” and it is by Maria Tsedrik and Benjamin Bose (University of Edinburgh, UK). The study investigates the Dark Scattering interacting dark energy scenario, using data from various sources. Results show no evidence of dark-sector interaction and a preference for the Chevallier-Polarski-Linder parametrisation.

The overlay is here:

You can find the authorized version of this paper on arXiv here and the Fediverse announcement is here:

https://fediscience.org/@OJ_Astro/116566165139100860

And that concludes this week’s update. I’ll do another next Saturday.

LYRA ultra-faints - the emergence of faint dwarf galaxies in the presence of an early Lyman–Werner background: https://academic.oup.com/mnras/article/548/2/stag439/8661239?login=false -> Local #DwarfGalaxies may preserve a record of the infant Universe: https://www.su.se/english/news/articles/2026-04-24-local-dwarf-galaxies-may-preserve-a-record-of-the-infant-universe

LYRA ultra-faints - the emergence of faint dwarf galaxies in the presence of an early Lyman–Werner background: https://academic.oup.com/mnras/article/548/2/stag439/8661239?login=false -> Local #DwarfGalaxies may preserve a record of the infant Universe: https://www.su.se/english/news/articles/2026-04-24-local-dwarf-galaxies-may-preserve-a-record-of-the-infant-universe

LYRA ultra-faints - the emergence of faint dwarf galaxies in the presence of an early Lyman–Werner background: https://academic.oup.com/mnras/article/548/2/stag439/8661239?login=false -> Local #DwarfGalaxies may preserve a record of the infant Universe: https://www.su.se/english/news/articles/2026-04-24-local-dwarf-galaxies-may-preserve-a-record-of-the-infant-universe

LYRA ultra-faints - the emergence of faint dwarf galaxies in the presence of an early Lyman–Werner background: https://academic.oup.com/mnras/article/548/2/stag439/8661239?login=false -> Local #DwarfGalaxies may preserve a record of the infant Universe: https://www.su.se/english/news/articles/2026-04-24-local-dwarf-galaxies-may-preserve-a-record-of-the-infant-universe

LYRA ultra-faints - the emergence of faint dwarf galaxies in the presence of an early Lyman–Werner background: https://academic.oup.com/mnras/article/548/2/stag439/8661239?login=false -> Local #DwarfGalaxies may preserve a record of the infant Universe: https://www.su.se/english/news/articles/2026-04-24-local-dwarf-galaxies-may-preserve-a-record-of-the-infant-universe

Astronomers discover a mysterious duality in dark matter

A dark matter signal that appears in one place but not another might look like a contradiction. This…
#NewsBeep #News #Science #Astronomy #Astrophysics #AU #Australia #Cosmology #darkmatter #dwarfgalaxies #FermiGamma-RaySpaceTelescope #galaxycenter #GammaRays #GordanKrnjaic #MilkyWay #particlephysics #research #SpaceNews
https://www.newsbeep.com/au/598499/

Astronomers discover a mysterious duality in dark matter

A dark matter signal that appears in one place but not another might look like a contradiction. This…
#NewsBeep #News #Science #Astronomy #Astrophysics #AU #Australia #Cosmology #darkmatter #dwarfgalaxies #FermiGamma-RaySpaceTelescope #galaxycenter #GammaRays #GordanKrnjaic #MilkyWay #particlephysics #research #SpaceNews
https://www.newsbeep.com/au/598499/

James Webb Space Telescope Spots Huge Black Holes Where They Shouldn’t Be, Adding to the Mystery of “Little Red Dots”

James Webb Space Telescope (JWST) observations have revealed unexpectedly overmassive black holes at the hearts of a pair…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Space #activegalacticnucleus #dwarfgalaxies #JamesWebbSpaceTelescope #LittleRedDots #Science #supermassiveblackhole
https://www.newsbeep.com/us/563152/

James Webb Space Telescope Spots Huge Black Holes Where They Shouldn’t Be, Adding to the Mystery of “Little Red Dots”

James Webb Space Telescope (JWST) observations have revealed unexpectedly overmassive black holes at the hearts of a pair…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Space #activegalacticnucleus #dwarfgalaxies #JamesWebbSpaceTelescope #LittleRedDots #Science #supermassiveblackhole
https://www.newsbeep.com/us/563152/

New in the #VirtualObservatory: “Metallicities for emission line galaxies from HALO7D” by Pharo J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/959/48
#DwarfGalaxies #VisibleAstronomy #Spectroscopy #ChemicalAbundances

New in the #VirtualObservatory: “Metallicity measurements of ~500 stars across 13 UFDs” by Fu S.W. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/958/167
#DwarfGalaxies #Metallicity #HstPhotometry #VisibleAstronomy

New in the #VirtualObservatory: “Abundances of low-metallicity stars in Sgr dwarf galaxy” by Ou X. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/169/279
#Photometry #RadialVelocity #VisibleAstronomy #DwarfGalaxies

https://www.europesays.com/ie/291556/ Malin 1’s secret diet: Giant galaxy found quietly cannibalising smaller neighbours #DwarfGalaxies #Éire #GalaxyFormationTheories. #IE #Ireland #LowSurfaceBrightnessGalaxy #Malin1 #Science #StarFormation

The Extended Stellar Distribution in the Outskirts of the Ursa Minor Dwarf Spheroidal Galaxy: https://iopscience.iop.org/article/10.3847/2041-8213/ae0cb3 -> Do Even Low-mass #DwarfGalaxies Merge? New Clues from the Outer Stars of a Milky Way Satellite: https://subarutelescope.org/en/results/2026/01/13/3641.html

The Extended Stellar Distribution in the Outskirts of the Ursa Minor Dwarf Spheroidal Galaxy: https://iopscience.iop.org/article/10.3847/2041-8213/ae0cb3 -> Do Even Low-mass #DwarfGalaxies Merge? New Clues from the Outer Stars of a Milky Way Satellite: https://subarutelescope.org/en/results/2026/01/13/3641.html

The Extended Stellar Distribution in the Outskirts of the Ursa Minor Dwarf Spheroidal Galaxy: https://iopscience.iop.org/article/10.3847/2041-8213/ae0cb3 -> Do Even Low-mass #DwarfGalaxies Merge? New Clues from the Outer Stars of a Milky Way Satellite: https://subarutelescope.org/en/results/2026/01/13/3641.html

The Extended Stellar Distribution in the Outskirts of the Ursa Minor Dwarf Spheroidal Galaxy: https://iopscience.iop.org/article/10.3847/2041-8213/ae0cb3 -> Do Even Low-mass #DwarfGalaxies Merge? New Clues from the Outer Stars of a Milky Way Satellite: https://subarutelescope.org/en/results/2026/01/13/3641.html

The Extended Stellar Distribution in the Outskirts of the Ursa Minor Dwarf Spheroidal Galaxy: https://iopscience.iop.org/article/10.3847/2041-8213/ae0cb3 -> Do Even Low-mass #DwarfGalaxies Merge? New Clues from the Outer Stars of a Milky Way Satellite: https://subarutelescope.org/en/results/2026/01/13/3641.html

New in the #VirtualObservatory: “Abundances of member stars of the Sextans dSph” by Roederer I.U. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/954/55
#VisibleAstronomy #DwarfGalaxies #InterstellarReddening #LineIntensities

New in the #VirtualObservatory: “GCs of dwarf galaxies in Perseus cluster” by Saifollahi T. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/703/A184
#GlobularStarClusters #GalaxyClusters #DwarfGalaxies #InfraredAstronomy

JWST/NIRCam View of the Resolved Stellar Populations of the Interacting #DwarfGalaxies NGC 4485 and NGC 4490: https://iopscience.iop.org/article/10.3847/1538-4357/adfccc -> A dance of dwarf galaxies: https://esawebb.org/images/potm2511a/

JWST/NIRCam View of the Resolved Stellar Populations of the Interacting #DwarfGalaxies NGC 4485 and NGC 4490: https://iopscience.iop.org/article/10.3847/1538-4357/adfccc -> A dance of dwarf galaxies: https://esawebb.org/images/potm2511a/

JWST/NIRCam View of the Resolved Stellar Populations of the Interacting #DwarfGalaxies NGC 4485 and NGC 4490: https://iopscience.iop.org/article/10.3847/1538-4357/adfccc -> A dance of dwarf galaxies: https://esawebb.org/images/potm2511a/

JWST/NIRCam View of the Resolved Stellar Populations of the Interacting #DwarfGalaxies NGC 4485 and NGC 4490: https://iopscience.iop.org/article/10.3847/1538-4357/adfccc -> A dance of dwarf galaxies: https://esawebb.org/images/potm2511a/

JWST/NIRCam View of the Resolved Stellar Populations of the Interacting #DwarfGalaxies NGC 4485 and NGC 4490: https://iopscience.iop.org/article/10.3847/1538-4357/adfccc -> A dance of dwarf galaxies: https://esawebb.org/images/potm2511a/

New in the #VirtualObservatory: “WISDOM Proj XII ALMA CO(2-1) of clumps and clouds” by Liu L. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/517/632
#Astrometry #DwarfGalaxies #Interferometry #Spectroscopy

#DwarfGalaxies May Hold the Answers to the Debate on #DarkMatter

https://www.universetoday.com/articles/dwarf-galaxies-may-hold-the-answers-to-the-debate-on-dark-matter

#DwarfGalaxies May Hold the Answers to the Debate on #DarkMatter

https://www.universetoday.com/articles/dwarf-galaxies-may-hold-the-answers-to-the-debate-on-dark-matter

#DwarfGalaxies May Hold the Answers to the Debate on #DarkMatter

https://www.universetoday.com/articles/dwarf-galaxies-may-hold-the-answers-to-the-debate-on-dark-matter

#DwarfGalaxies May Hold the Answers to the Debate on #DarkMatter

https://www.universetoday.com/articles/dwarf-galaxies-may-hold-the-answers-to-the-debate-on-dark-matter

#DwarfGalaxies May Hold the Answers to the Debate on #DarkMatter

https://www.universetoday.com/articles/dwarf-galaxies-may-hold-the-answers-to-the-debate-on-dark-matter

New in the #VirtualObservatory: “Optical variability of ~700 low mass AGNs” by Burke C.J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/516/2736
#Redshifted #DwarfGalaxies #ActiveGalacticNuclei #Astrometry

We Finally Know How The Lights Switched on at The Dawn of Time

We may finally know what first lit up the cosmic dawn in the early Universe. According to data…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Science #astrophysicist #cosmicdawn #dwarfgalaxies #Institutd'AstrophysiquedeParis #intergalacticspace #JamesWebb #lightsources #neutralhydrogen
https://www.newsbeep.com/us/203357/

We Finally Know How The Lights Switched on at The Dawn of Time

We may finally know what first lit up the cosmic dawn in the early Universe. According to data…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Science #astrophysicist #cosmicdawn #dwarfgalaxies #Institutd'AstrophysiquedeParis #intergalacticspace #JamesWebb #lightsources #neutralhydrogen
https://www.newsbeep.com/us/203357/

We Finally Know How The Lights Switched on at The Dawn of Time

We may finally know what first lit up the cosmic dawn in the early Universe. According to data…
#NewsBeep #News #Science #astrophysicist #AU #Australia #cosmicdawn #dwarfgalaxies #Institutd'AstrophysiquedeParis #intergalacticspace #JamesWebb #lightsources #neutralhydrogen
https://www.newsbeep.com/au/190539/

Weekly Update from the Open Journal of Astrophysics – 27/09/2025

It’s Saturday again, so it’s time for a summary of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published five new papers, which brings the number in Volume 8 (2025) up to 141, and the total so far published by OJAp up to 376.

The first paper to report this week is “The Bispectrum of Intrinsic Alignments: Theory Modelling and Forecasts for Stage IV Galaxy Surveys” by Thomas Bakx (Utrecht U., NL), Alexander Eggemeier (U. Bonn, DE), Toshiki Kurita (MPA Garching, DE), Nora Elisa Chisari (Leiden U., NL) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was published on Monday 22nd September 2025 in the folder Cosmology and NonGalactic Astrophysics. It studies the bispectrum of intrinsic galaxy alignments, a possible source of systematic errors in extracting cosmological information from the analysis of weak lensing surveys.

The overlay is here:

You can make this larger by clicking on it.  The officially accepted version of this paper can be found on the arXiv here.

The second paper this week, published on Tuesday 23rd September 2025 is “Reanalysis of Stage-III cosmic shear surveys: A comprehensive study of shear diagnostic tests” by Jazmine Jefferson (University of Chicago, USA) and 13 others for the LSST Dark Energy Science Collaboration. It is also in the folder Cosmology and NonGalactic Astrophysics; it describes diagnostic tests on three public shear catalogs (KiDS-1000, Year 3 DES-Y3 s, and Year 3 HSC-Y3); not all the surveys pass all the tests.

The corresponding overlay is here:

You can find the officially accepted version on arXiv here.

The third one this week, published on Wednesday 24th September 2025 in the folder Astrophysics of Galaxies, is “Is feedback-free star formation possible?” by Andrea Ferrara, Daniele Manzoni, and Evangelia Ntormousi (all of the Scuola Normale Superiore, Pisa, Italy). This paper presents an argument that Lyman-alpha radiation pressure strongly limits star formation efficiency, even at solar metallicities, so that a feedback-free star formation phase is not possible without feedback. The overlay is here:

You can find the officially-accepted version on arXiv here.

Next we have “Microphysical Regulation of Non-Ideal MHD in Weakly-Ionized Systems: Does the Hall Effect Matter?” by Philip F. Hopkins (Caltech, USA), Jonathan Squire (U. Otago, New Zeland), Raphael Skalidis (Caltech) and Nadine H. Soliman (Caltech). This was also published on Wednesday 24th September 2025, but in the folder Earth and Planetary Astrophysics. It presents an improved treatment of non-ideal effects in magnetohydrodynamics, particularly the Hall effect, and a discussion of the implications for weakly-ionized astrophysical systems.

The corresponding overlay is here:

You can find the officially accepted version of this one on arXiv here.

The fifth, and last, one for this week is “The Local Volume Database: a library of the observed properties of nearby dwarf galaxies and star clusters” by Andrew B. Pace (University of Virginia, USA). This one was published on Friday 26th September (i.e. yesterday) in the folder Astrophysics of Galaxies. It presents a catalogue of positional, structural, kinematic, chemical, and dynamical parameters for dwarf galaxies and star clusters in the Local Volume. The overlay is here:

You can find the officially-accepted version of this paper on arxiv here.

And that concludes the report for this week. I’ll post another update next Saturday.

#arXiv240506026v2 #arXiv241107424v2 #arXiv250410009v2 #arXiv250503964v3 #arXiv250902566v2 #AstrophysicsOfGalaxies #bispectrum #cosmicShear #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #DiamondOpenAccessPublishing #dwarfGalaxies #EarthAndPlanetaryAstrophysics #feedback #HallEffect #intrinsicAlignments #KIDS #LocalGroup #magnetohydrodynamics #OpenAccessPublishing #StarClusters #starFormation #weakGravitationalLensing

Weekly Update from the Open Journal of Astrophysics – 27/09/2025

It’s Saturday again, so it’s time for a summary of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published five new papers, which brings the number in Volume 8 (2025) up to 141, and the total so far published by OJAp up to 376.

The first paper to report this week is “The Bispectrum of Intrinsic Alignments: Theory Modelling and Forecasts for Stage IV Galaxy Surveys” by Thomas Bakx (Utrecht U., NL), Alexander Eggemeier (U. Bonn, DE), Toshiki Kurita (MPA Garching, DE), Nora Elisa Chisari (Leiden U., NL) and Zvonimir Vlah (Ruđer Bošković Institute, Croatia). This paper was published on Monday 22nd September 2025 in the folder Cosmology and NonGalactic Astrophysics. It studies the bispectrum of intrinsic galaxy alignments, a possible source of systematic errors in extracting cosmological information from the analysis of weak lensing surveys.

The overlay is here:

You can make this larger by clicking on it.  The officially accepted version of this paper can be found on the arXiv here.

The second paper this week, published on Tuesday 23rd September 2025 is “Reanalysis of Stage-III cosmic shear surveys: A comprehensive study of shear diagnostic tests” by Jazmine Jefferson (University of Chicago, USA) and 13 others for the LSST Dark Energy Science Collaboration. It is also in the folder Cosmology and NonGalactic Astrophysics; it describes diagnostic tests on three public shear catalogs (KiDS-1000, Year 3 DES-Y3 s, and Year 3 HSC-Y3); not all the surveys pass all the tests.

The corresponding overlay is here:

You can find the officially accepted version on arXiv here.

The third one this week, published on Wednesday 24th September 2025 in the folder Astrophysics of Galaxies, is “Is feedback-free star formation possible?” by Andrea Ferrara, Daniele Manzoni, and Evangelia Ntormousi (all of the Scuola Normale Superiore, Pisa, Italy). This paper presents an argument that Lyman-alpha radiation pressure strongly limits star formation efficiency, even at solar metallicities, so that a feedback-free star formation phase is not possible without feedback. The overlay is here:

You can find the officially-accepted version on arXiv here.

Next we have “Microphysical Regulation of Non-Ideal MHD in Weakly-Ionized Systems: Does the Hall Effect Matter?” by Philip F. Hopkins (Caltech, USA), Jonathan Squire (U. Otago, New Zeland), Raphael Skalidis (Caltech) and Nadine H. Soliman (Caltech). This was also published on Wednesday 24th September 2025, but in the folder Earth and Planetary Astrophysics. It presents an improved treatment of non-ideal effects in magnetohydrodynamics, particularly the Hall effect, and a discussion of the implications for weakly-ionized astrophysical systems.

The corresponding overlay is here:

You can find the officially accepted version of this one on arXiv here.

The fifth, and last, one for this week is “The Local Volume Database: a library of the observed properties of nearby dwarf galaxies and star clusters” by Andrew B. Pace (University of Virginia, USA). This one was published on Friday 26th September (i.e. yesterday) in the folder Astrophysics of Galaxies. It presents a catalogue of positional, structural, kinematic, chemical, and dynamical parameters for dwarf galaxies and star clusters in the Local Volume. The overlay is here:

You can find the officially-accepted version of this paper on arxiv here.

And that concludes the report for this week. I’ll post another update next Saturday.

#arXiv240506026v2 #arXiv241107424v2 #arXiv250410009v2 #arXiv250503964v3 #arXiv250902566v2 #AstrophysicsOfGalaxies #bispectrum #cosmicShear #CosmologyAndNonGalacticAstrophysics #DarkEnergySurvey #DiamondOpenAccessPublishing #dwarfGalaxies #EarthAndPlanetaryAstrophysics #feedback #HallEffect #intrinsicAlignments #KIDS #LocalGroup #magnetohydrodynamics #OpenAccessPublishing #StarClusters #starFormation #weakGravitationalLensing

Discovery of Vast Hydrogen ‘Cosmic Bridge’ Offers New Clues to Galactic Evolution

Spanning the gulf between two dwarf galaxies, an immense strand of hydrogen gas is acting as a cosmic…
#NewsBeep #News #Science #AU #Australia #dwarfgalaxies #gasbridge #hydrogen #universityofwesternaustralia #WALLABY
https://www.newsbeep.com/au/171899/

New in the #VirtualObservatory: “U-SMAC II. FUV catalog of sources detected in SMC” by Hota S. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/255
#Surveys #MagellanicClouds #DwarfGalaxies #Photometry

New in the #VirtualObservatory: “Fornax dSph star members study with GaiaEDR3” by Yang Y. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/512/4171
#DwarfGalaxies #VisibleAstronomy #Galaxies #LocalGroup

Identifying Dwarfs of MC Analog GalaxiEs (ID-MAGE) - The Search for Satellites around Low-mass Hosts: https://iopscience.iop.org/article/10.3847/1538-4357/ade9a4 -> New Dartmouth Survey Maps Satellite Systems of #DwarfGalaxies: https://fas.dartmouth.edu/news/2025/07/new-dartmouth-survey-maps-satellite-systems-dwarf-galaxies - the discovery of hundreds of potential dwarf galaxies could shed light on the early universe's formation.

Identifying Dwarfs of MC Analog GalaxiEs (ID-MAGE) - The Search for Satellites around Low-mass Hosts: https://iopscience.iop.org/article/10.3847/1538-4357/ade9a4 -> New Dartmouth Survey Maps Satellite Systems of #DwarfGalaxies: https://fas.dartmouth.edu/news/2025/07/new-dartmouth-survey-maps-satellite-systems-dwarf-galaxies - the discovery of hundreds of potential dwarf galaxies could shed light on the early universe's formation.

Identifying Dwarfs of MC Analog GalaxiEs (ID-MAGE) - The Search for Satellites around Low-mass Hosts: https://iopscience.iop.org/article/10.3847/1538-4357/ade9a4 -> New Dartmouth Survey Maps Satellite Systems of #DwarfGalaxies: https://fas.dartmouth.edu/news/2025/07/new-dartmouth-survey-maps-satellite-systems-dwarf-galaxies - the discovery of hundreds of potential dwarf galaxies could shed light on the early universe's formation.

Identifying Dwarfs of MC Analog GalaxiEs (ID-MAGE) - The Search for Satellites around Low-mass Hosts: https://iopscience.iop.org/article/10.3847/1538-4357/ade9a4 -> New Dartmouth Survey Maps Satellite Systems of #DwarfGalaxies: https://fas.dartmouth.edu/news/2025/07/new-dartmouth-survey-maps-satellite-systems-dwarf-galaxies - the discovery of hundreds of potential dwarf galaxies could shed light on the early universe's formation.

Identifying Dwarfs of MC Analog GalaxiEs (ID-MAGE) - The Search for Satellites around Low-mass Hosts: https://iopscience.iop.org/article/10.3847/1538-4357/ade9a4 -> New Dartmouth Survey Maps Satellite Systems of #DwarfGalaxies: https://fas.dartmouth.edu/news/2025/07/new-dartmouth-survey-maps-satellite-systems-dwarf-galaxies - the discovery of hundreds of potential dwarf galaxies could shed light on the early universe's formation.

#DwarfGalaxies Like the #Magellanic Clouds Have Their Own Small #Satellite #Galaxies

https://www.universetoday.com/articles/dwarf-galaxies-like-the-magellanic-clouds-have-their-own-small-satellite-galaxies

#DwarfGalaxies Like the #Magellanic Clouds Have Their Own Small #Satellite #Galaxies

https://www.universetoday.com/articles/dwarf-galaxies-like-the-magellanic-clouds-have-their-own-small-satellite-galaxies