home.social

#supermassiveblackholes — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #supermassiveblackholes, aggregated by home.social.

  1. Weekly Update from the Open Journal of Astrophysics – 02/05/2026

    Here we are, on schedule, with another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further seven papers, bringing the number in Volume 9 (2026) to 94 and the total so far published by OJAp up to 542. I checked the corresponding update for last year (on 3rd May 2025), and we’ve had an increase from 54 to 94 in papers published (about 74%) between the first four months of 2025 and the first four months of 2026.

    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 is “DESI-DR1 3 × 2-pt analysis: consistent cosmology across weak lensing surveys” by Anna Porredon (CIEMAT, Madrid, Spain) and 72 others (DESI Colllaboration). This paper was published on Tuesday 28th April in the folder Cosmology and Nongalactic Astrophysics. This paper presents a joint cosmological analysis of galaxy clustering and gravitational lensing observations, providing consistent constraints on cosmological parameters. The analysis also introduces a new blinding procedure to prevent confirmation bias. See this post for news of an important DESI milestone.

    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/116480407578621011

    The second paper for this week, also published on Tuesday 28th April but in the folder High-Energy Astrophysical Phenomena is “Masers and Broad-Line Mapping Favor Magnetically-Dominated AGN Accretion Disks” by Philip F. Hopkins (Caltech, USA), Dalya Baron (Stanford U., USA) and Joanna M. Piotrowska (Caltech). This one presents a new constraint on supermassive black hole accretion disks physics, suggesting that outer regions are likely in a ‘hyper-magnetized’ state, as thermal or radiation pressure models appear inconsistent.

    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/116480505354195181

    Next one up, the third paper of the week, is “Galaxy mergers and disk angular momentum evolution: stellar halos as a critical test” by Eric F. Bell (U. Michigan, Ann Arbor, USA), Richard D’Souza (Vatican Observatory), Monica Valluri & Katya Gozman (U. Michigan). This was published on Wednesday 29th April in the folder Astrophysics of Galaxies. The paper argues that satellite accretion impacts the angular momentum evolution of galaxies, often causing significant reorientation. This process is detectable in Milky Way-mass galaxies so the idea is testable observationally.

    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/116486649450860283

    The fourth paper this week, published on Thursday April 30th, is “Time-Dilation Methods for Extreme Multiscale Timestepping Problems” by Philip F. Hopkins and Elias R. Most (Caltech, USA). This paper is in the folder Instrumentation and Methods for Astrophysics: it presents a new method for astrophysical simulations that modulates time evolution with a variable dilation/stretch factor, improving efficiency and accuracy in modeling processes across different scales.

    The overlay is here:

    The finally accepted version of this paper can be found here and the Mastodon announcement follows:

    https://fediscience.org/@OJ_Astro/116492226856595031

    The fifth article of this week was also published on Thursday 30th April, but in the folder Astrophysics of Galaxies. The title is “Cosmic Rays on Galaxy Scales: Progress and Pitfalls for CR-MHD Dynamical Models” and the author is Philip F. Hopkins (Caltech, USA) who has three papers featured this week. The paper presents an overview of cosmic ray (CR) modeling, highlighting its influence on galactic physics and star formation. It addresses previous modeling errors and presents new methods for full-spectrum dynamics.

    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/116492282488422075

    The sixth paper of the week is “Baryonification III: An accurate analytical model for the dispersion measure probability density function of fast radio bursts” by MohammadReza Torkamani (Universität Bonn, Germany) and 8 others based in Germany, Switzerland, UK and Sweden. This article was also published on Thursday April 30th in the folder Cosmology and Nongalactic Astrophysics. It presents a framework for predicting dispersion measures of fast radio bursts using the baryonification model, providing a cost-effective alternative to hydrodynamical simulations. The model’s accuracy is validated through full numerical simulations. The overlay is here:

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

    https://fediscience.org/@OJ_Astro/116492403170125062

    Seventh and finally for this week we have “The stellar and dark matter distributions in early-type galaxies measured by stacked weak gravitational lensing” by Momoka Fujikawa and Masamune Oguri (Chiba University, Japan). This study uses weak gravitational lensing to investigate stellar mass and dark matter density in red galaxies, suggesting a stronger feedback effect than current simulations predict. This was published on Friday 1st May 2026 in the folder Astrophysics of Galaxies. The overlay is here:

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

    https://fediscience.org/@OJ_Astro/116497987401632687

    And that concludes this week’s update. I’ll do another one at the end of next week. Will Vol. 9 have reached a hundred by then?

    P.S. Just a reminder that, thanks to the efforts of a member of our Editorial Board, the Open Journal of Astrophysics now has a Wikipedia page.

    #32PtAnalysis #ActiveGalacticNuclei #AGN #arXiv250907104v2 #arXiv251009756v2 #arXiv251209342v2 #arXiv251215960v3 #arXiv260106253v2 #arXiv260118784v2 #arXiv260424965v1 #AstrophysicsOfGalaxies #baryonification #ComputationalAstrophysics #cosmicRays #CosmologyAndNonGalacticAstrophysics #DarkEnergySpectroscopicInstrument #DESI #DiamondOpenAccess #DiamondOpenAccessPublishing #DispersionMeasures #fastRadioBursts #galacticCosmicRays #galaxyEvolution #galaxyFormation #galaxyMergers #HighEnergyAstrophysicalPhenomena #InstrumentationAndMethodsForAstrophysics #magnetohydrodynamics #masers #MilkyWay #OpenAccess #OpenAccessPublishing #SolarAndStellarAstrophysics #SolarCorona #supermassiveBlackHoles #VeraCRubinObservatory #weakGravitationalLensing #wikipedia
  2. Weekly Update from the Open Journal of Astrophysics – 02/05/2026

    Here we are, on schedule, with another update of activity at the Open Journal of Astrophysics. Since the last update we have published a further seven papers, bringing the number in Volume 9 (2026) to 94 and the total so far published by OJAp up to 542. I checked the corresponding update for last year (on 3rd May 2025), and we’ve had an increase from 54 to 94 in papers published (about 74%) between the first four months of 2025 and the first four months of 2026.

    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 is “DESI-DR1 3 × 2-pt analysis: consistent cosmology across weak lensing surveys” by Anna Porredon (CIEMAT, Madrid, Spain) and 72 others (DESI Colllaboration). This paper was published on Tuesday 28th April in the folder Cosmology and Nongalactic Astrophysics. This paper presents a joint cosmological analysis of galaxy clustering and gravitational lensing observations, providing consistent constraints on cosmological parameters. The analysis also introduces a new blinding procedure to prevent confirmation bias. See this post for news of an important DESI milestone.

    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/116480407578621011

    The second paper for this week, also published on Tuesday 28th April but in the folder High-Energy Astrophysical Phenomena is “Masers and Broad-Line Mapping Favor Magnetically-Dominated AGN Accretion Disks” by Philip F. Hopkins (Caltech, USA), Dalya Baron (Stanford U., USA) and Joanna M. Piotrowska (Caltech). This one presents a new constraint on supermassive black hole accretion disks physics, suggesting that outer regions are likely in a ‘hyper-magnetized’ state, as thermal or radiation pressure models appear inconsistent.

    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/116480505354195181

    Next one up, the third paper of the week, is “Galaxy mergers and disk angular momentum evolution: stellar halos as a critical test” by Eric F. Bell (U. Michigan, Ann Arbor, USA), Richard D’Souza (Vatican Observatory), Monica Valluri & Katya Gozman (U. Michigan). This was published on Wednesday 29th April in the folder Astrophysics of Galaxies. The paper argues that satellite accretion impacts the angular momentum evolution of galaxies, often causing significant reorientation. This process is detectable in Milky Way-mass galaxies so the idea is testable observationally.

    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/116486649450860283

    The fourth paper this week, published on Thursday April 30th, is “Time-Dilation Methods for Extreme Multiscale Timestepping Problems” by Philip F. Hopkins and Elias R. Most (Caltech, USA). This paper is in the folder Instrumentation and Methods for Astrophysics: it presents a new method for astrophysical simulations that modulates time evolution with a variable dilation/stretch factor, improving efficiency and accuracy in modeling processes across different scales.

    The overlay is here:

    The finally accepted version of this paper can be found here and the Mastodon announcement follows:

    https://fediscience.org/@OJ_Astro/116492226856595031

    The fifth article of this week was also published on Thursday 30th April, but in the folder Astrophysics of Galaxies. The title is “Cosmic Rays on Galaxy Scales: Progress and Pitfalls for CR-MHD Dynamical Models” and the author is Philip F. Hopkins (Caltech, USA) who has three papers featured this week. The paper presents an overview of cosmic ray (CR) modeling, highlighting its influence on galactic physics and star formation. It addresses previous modeling errors and presents new methods for full-spectrum dynamics.

    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/116492282488422075

    The sixth paper of the week is “Baryonification III: An accurate analytical model for the dispersion measure probability density function of fast radio bursts” by MohammadReza Torkamani (Universität Bonn, Germany) and 8 others based in Germany, Switzerland, UK and Sweden. This article was also published on Thursday April 30th in the folder Cosmology and Nongalactic Astrophysics. It presents a framework for predicting dispersion measures of fast radio bursts using the baryonification model, providing a cost-effective alternative to hydrodynamical simulations. The model’s accuracy is validated through full numerical simulations. The overlay is here:

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

    https://fediscience.org/@OJ_Astro/116492403170125062

    Seventh and finally for this week we have “The stellar and dark matter distributions in early-type galaxies measured by stacked weak gravitational lensing” by Momoka Fujikawa and Masamune Oguri (Chiba University, Japan). This study uses weak gravitational lensing to investigate stellar mass and dark matter density in red galaxies, suggesting a stronger feedback effect than current simulations predict. This was published on Friday 1st May 2026 in the folder Astrophysics of Galaxies. The overlay is here:

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

    https://fediscience.org/@OJ_Astro/116497987401632687

    And that concludes this week’s update. I’ll do another one at the end of next week. Will Vol. 9 have reached a hundred by then?

    P.S. Just a reminder that, thanks to the efforts of a member of our Editorial Board, the Open Journal of Astrophysics now has a Wikipedia page.

    #32PtAnalysis #ActiveGalacticNuclei #AGN #arXiv250907104v2 #arXiv251009756v2 #arXiv251209342v2 #arXiv251215960v3 #arXiv260106253v2 #arXiv260118784v2 #arXiv260424965v1 #AstrophysicsOfGalaxies #baryonification #ComputationalAstrophysics #cosmicRays #CosmologyAndNonGalacticAstrophysics #DarkEnergySpectroscopicInstrument #DESI #DiamondOpenAccess #DiamondOpenAccessPublishing #DispersionMeasures #fastRadioBursts #galacticCosmicRays #galaxyEvolution #galaxyFormation #galaxyMergers #HighEnergyAstrophysicalPhenomena #InstrumentationAndMethodsForAstrophysics #magnetohydrodynamics #masers #MilkyWay #OpenAccess #OpenAccessPublishing #SolarAndStellarAstrophysics #SolarCorona #supermassiveBlackHoles #VeraCRubinObservatory #weakGravitationalLensing #wikipedia
  3. Direct collapse black hole candidates from decaying dark matter: iopscience.iop.org/article/10. -> Dark matter could explain earliest #SupermassiveBlackHoles: news.ucr.edu/articles/2026/04/ - dark matter decays could be the missing ingredient explaining how giant black holes formed before the first stars.

  4. Mega Laser Beam Signal: Astronomers detect mega-laser beam signal from 8 billion light-years away |

    One of the most remarkable discoveries made by astronomers in recent years is the identification of an extremely…
    #NewsBeep #News #Physics #astronomydiscoveries #gravitationallensing #HATLASJ142935.3–002836 #hydroxylmegamaser #mega-lasersignal #radiotelescope #Science #spacesignals #supermassiveblackholes #UK #UnitedKingdom
    newsbeep.com/uk/528560/

  5. Mega Laser Beam Signal: Astronomers detect mega-laser beam signal from 8 billion light-years away |

    One of the most remarkable discoveries made by astronomers in recent years is the identification of an extremely…
    #NewsBeep #News #Physics #astronomydiscoveries #AU #Australia #gravitationallensing #HATLASJ142935.3–002836 #hydroxylmegamaser #mega-lasersignal #radiotelescope #Science #spacesignals #supermassiveblackholes
    newsbeep.com/au/603514/

  6. Mega Laser Beam Signal: Astronomers detect mega-laser beam signal from 8 billion light-years away |

    One of the most remarkable discoveries made by astronomers in recent years is the identification of an extremely…
    #NewsBeep #News #Physics #astronomydiscoveries #AU #Australia #gravitationallensing #HATLASJ142935.3–002836 #hydroxylmegamaser #mega-lasersignal #radiotelescope #Science #spacesignals #supermassiveblackholes
    newsbeep.com/au/603514/

  7. This evening I learned the following bizarre things:
    0/ Colliding massive objects create gravity waves (this I already knew).
    1/ When spinning black holes collide, they experience an acceleration at right angles to the sum of the spins.
    2/ The bigger the black holes, the greater the acceleration and resulting speed.
    3/ When this happens with galactic core supermassive black holes, this can exceed the escape velocity of the galaxies.
    4/ When one of these high-speed supermassive black holes encounters a dust or gas cloud, it creates a contrail of stars! And we can see these star-contrails - straight lines of stars, scattered across the cosmos!

    Thank-you Professor David Blair!

    science.nasa.gov/missions/hubb

    #Astronomy #Astrophysics #Astrodon #BlackHoles #GravityWaves #SuperMassiveBlackHoles

  8. NASA’s Chandra telescope uses ‘X-arithmetic’ to reveal how black holes shape galaxy clusters (images)

    When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit:…
    #NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Science #blackhole #cosmicstructures #Galaxyclusters #Imageprocessing #NASA #shockfronts #supermassiveblackholes
    newsbeep.com/us/346003/

  9. NASA’s Chandra telescope uses ‘X-arithmetic’ to reveal how black holes shape galaxy clusters (images)

    When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit:…
    #NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Science #blackhole #cosmicstructures #Galaxyclusters #Imageprocessing #NASA #shockfronts #supermassiveblackholes
    newsbeep.com/us/346003/

  10. While we're on the subject of the horrifying scale of the Universe, I cannot get over what big fat bastard the SMBH at the centre of M87 is when compared to ours!

    #Astrodon #SuperMassiveBlackHoles #M87 #MilkyWayGalaxy #Space

  11. Astronomers capture first-ever image of two black holes orbiting each other

    Astronomers had long suspected that certain quasars—those brilliant, otherworldly light sources fueled by supermassive black holes—could harbor two…
    #NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Space #AstrophysicalJournal #Blackholes #MauriValtonen #OJ287 #radiotelescopes #RadioAstron #Science #supermassiveblackholes
    newsbeep.com/us/218679/

  12. Astronomers capture first-ever image of two black holes orbiting each other

    Astronomers had long suspected that certain quasars—those brilliant, otherworldly light sources fueled by supermassive black holes—could harbor two…
    #NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Space #AstrophysicalJournal #Blackholes #MauriValtonen #OJ287 #radiotelescopes #RadioAstron #Science #supermassiveblackholes
    newsbeep.com/us/218679/

  13. Was reading some online slides and came across this excellent #RadioAstronomy image from the NRAO/AUI/NSF.

    The terrestrial portion is optical wavelengths. Above this is radio wavelengths.

    Those are not stars. They are radio sources.

    They're supermassive black holes in the centres of galaxies.

    The sky portion of this image was taken by the now fallen 300-ft radio telescope, pictured here as the largest dish between the smaller dishes.

    If you had a radio wavelength-detecting eye that was 300 feet in diameter, this is how the sky would look to you.

    A sea sprinkled with ancient light.

    You can download this image, and use it from this link from the NRAO site here: nrao.edu/archives/items/show/3

    Be sure to attribute properly and just copy my alt-text.

    You can also read the paper here: articles.adsabs.harvard.edu/pd

    #RadioAstronomy #SupermassiveBlackHoles #Astrodon

  14. In Jan, #astronomers announced that the #JamesWebbSpaceTelescope had observed the oldest black hole yet—one present when the universe was a mere 400M yrs old.…Recently, 2 #SupermassiveBlackHoles, w/a combined mass of 28B suns, were measured & shown to have been rotating tightly around each other, but not colliding, for the past 3B years. And those are just the examples that are easiest for the public to make some sense of.

    #BlackHoles #Astrophysics #astronomy #TheoreticalPhysics #science

  15. Supermassive black hole binary pair, which have been resolved (!) and are separated by a mere 24 light-years (P_b = ~30,000 yrs) whilst suffering from the Final Parsec problem have had a new mass reported in this paper ... and the combined mass comes in at a whopping 28 billion Suns!

    iopscience.iop.org/article/10.

    #SupermassiveBlackHoles #Galaxies #Astrophysics #Astrodon

  16. Supermassive black holes, a cornerstone of cosmic wonder! From massive star remnants to direct-collapse giants, their formation theories highlight our quest to understand the universe's deepest mysteries. 🤯🌌 #UniverseSecrets #SupermassiveBlackHoles #Astrophysics

  17. Half of the mass of an early galaxy is in its central black hole - Enlarge / Inset shows the JWST image of the galaxy in infrared, along w... - arstechnica.com/?p=1981795 #supermassiveblackholes #chandraobservatory #webbtelescope #astrophysics #blackholes #astronomy #science #x-rays

  18. NANOGrav hears “hum” of gravitational wave background, louder than expected - Enlarge / In this artist’s interpretation, a pair of supermassive black... - arstechnica.com/?p=1950301 #supermassiveblackholes #gravitationalwaves #astrophysics #astronomy #cosmology #nanograv #science #physics #ligo

  19. X-ray “light echoes” hint at outburst from Milky Way’s central black hole - Enlarge / This is the first image of Sgr A*, the supermassive black hol... - arstechnica.com/?p=1949885 #supermassiveblackholes #astrophysics #blackholes #astronomy #science #sgra*

  20. Scientists have proposed a new explanation for the origin of supermassive black holes, the most powerful gravitational objects in the universe. They suggest that supermassive black holes formed from the collapse of massive clouds of gas and dust in the early universe. This scenario could explain how some supermassive black holes grew quickly and became billions of times more massive than the sun.

    #SupermassiveBlackHoles #Cosmology #GasClouds

    livescience.com/space/black-ho

  21. Black hole is soaring between galaxies, leaving stars in its wake - Enlarge / Artist's impression of a supermassive black hole trailing gal... - arstechnica.com/?p=1930219 #supermassiveblackholes #galaxymergers #astrophysics #blackholes #astronomy #science

  22. The discovery of a doughnut shaped torus shows a link between various types of active galaxies (quasars, blazars, etc.): we’re just viewing a common type of galaxy with an active galactic nucleus from different angles.

    #Astronomy #Space #Galaxies #ActiveGalacticNucleus #SuperMassiveBlackHoles

    public.nrao.edu/news/key-featu