#quasars — Public Fediverse posts

New in the #VirtualObservatory: “ALMA multiband polarimetry of 3C273” by Hovatta T. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/712/A244
#Quasars #Polarimetry #MagneticFields

New in the #VirtualObservatory: “ALMA multiband polarimetry of 3C273” by Hovatta T. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/712/A244
#Quasars #Polarimetry #MagneticFields

New in the #VirtualObservatory: “Changing-Look AGN from DESI. V.” by Chen Z.-Q. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/282/28
#BlackHoles #RadioSources #Quasars #Redshifted

Weekly Update from the Open Journal of Astrophysics 08/08/2026

Although it’s holiday season for some, it’s time once more for another Saturday update of activity at the Open Journal of Astrophysics. Since the last update we have published a further four papers, bringing the number in Volume 9 (2026) to 167 and the total so far published by OJAp up to 615.

I continue to include the posts made on our Mastodon account (on Fediscience); these announcements also show the DOI for each paper.

The first paper to report this week was published on Tuesday 4th August in the folder Astrophysics of Galaxies with the title “Small-scale turbulence alongside large-scale turbulence in a z=1.87 star-forming galaxy with an outflowing wind, revealed by multi-point structure functions” by Itzhak Goldman (Afeka College, Israel). A previous study by the author found evidence of large and small scale turbulence in the star-forming galaxy CSWA13, suggesting that star clusters and large clumps within the galaxy could be driving this turbulence.

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/117036181269903989

The second paper for this week, published on Thursday 6th August in the folder Astrophysics of Galaxies, is “From Clumps to Sheets: Geometry Controls the Temperature PDF of Multi-Phase Gas” by Zirui Chen and S. Peng Oh (UC Santa Barbara, USA). This study uses 3D hydrodynamic simulations to show that the temperature probability distribution functions (PDFs) of multi-phase turbulent gas differ significantly under interstellar medium (ISM) and circumgalactic medium (CGM) conditions.

The overlay looks like this:

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

https://fediscience.org/@OJ_Astro/117047322340826393

The third paper of the week, published on Thursday 6th August in folder Instrumentation and Methods for Astrophysics is “First Detection of Extensive Air Showers Using a Small-Aperture Fluorescence Telescope” by M. Zotov (M.V. Lomonosov Moscow State University, Russia) and 7 others based in Russia and Armenia. The study reports the first-ever detection of extensive air showers from ultra-high-energy cosmic rays using a compact fluorescence telescope, employing both conventional and deep learning analysis methods.

The overlay is here:

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

https://fediscience.org/@OJ_Astro/117047408583672745

The fourth and final paper of the week was published on Friday 7th August in the folder Cosmology and Nongalactic Astrophysics: “TDCOSMO XXVI: Uniform Lens Modeling of Eight Doubly Imaged Quasars“, by Ryan Brady (Stony Brook University, USA) and 9 others based all around the world, presents a new method for analyzing doubly imaged quasars using the Hubble Space Telescope, revealing that arc surface brightness is key to precision in mass model measurements.

The overlay is here:

The officially-accepted version of the paper can be found on arXiv here and the Fediverse announcement here:

https://fediscience.org/@OJ_Astro/117053056092162466

That’s all for this week. We have about a dozen more papers accepted and waiting for the authors to put the final version on arXiv, which they will presumably do when they’re back from holiday. I’ll do an update next weekend and we’ll see!

New in the #VirtualObservatory: “ALMACAL IX calibrators for DSFGs/SMGs sources” by Chen J. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/518/1378
#Astrometry #Quasars #RadioSources #SubmillimeterAstronomy

NASA’s Webb Delivers Unprecedented Look Into Heart of Circinus Galaxy https://science.nasa.gov/missions/webb/nasas-webb-delivers-unprecedented-look-into-heart-of-circinus-galaxy/ #NASA #ActiveGalaxies #Astrophysics #BlackHoles #Galaxies #GalaxiesStarsBlackHoles #GoddardSpaceFlightCenter #JamesWebbSpaceTelescopeJWST #Quasars #ScienceResearch #TheUniverse

NASA’s Webb Delivers Unprecedented Look Into Heart of Circinus Galaxy

https://web.brid.gy/r/https://science.nasa.gov/missions/webb/nasas-webb-delivers-unprecedented-look-into-heart-of-circinus-galaxy/

Weekly Update from the Open Journal of Astrophysics – 30/08/2025

Once again 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 three new papers, which brings the number in Volume 8 (2025) up to 125, and the total so far published by OJAp up to 360.

The first paper to report this week is “Large-scale surveys of the quasar proximity effect” by Rupert Croft, Patrick Shaw & Ann-Marsha Alexis (Carnegie Mellon University; CMU), Nianyi Chen (Princeton), Yihao Zhou & Tiziana Di Matteo (CMU), Simeon Bird (UC Riverside), Patrick Lachance (CMU), and Yueying Ni (Harvard). This paper was published on Monday 25th August in the folder Cosmology and NonGalactic Astrophysics. It presents a CDM-based halo model of the quasar proximity effect, tested on quasar Lyman-alpha spectra from the ASTRID cosmological simulation, including self-consistent formation of quasar black holes and the intergalactic medium.

The overlay is here:

You can make this larger by clicking on it, as you can with all the overlays below. The officially accepted version of this paper can be found on the arXiv here.

The second paper this week, also published on Monday 25th August, but in the folder Astrophysics of Galaxies, is “Redshift evolution of Lyman continuum escape fraction after JWST” by Andrea Ferrara (Pisa), M. Giavalisco (UMass Amherst), L. Pentericci (Rome), E. Vanzella (Bologna), A. Calabrò (Rome) and M. Llerena (Rome). This paper is about the Attenuation-Free Model (AFM) for galaxies, in which radiation-driven outflows develop once the galaxy specific star formation rate exceeds a certain level, which is tested on data with positive results. The overlay is here:

You can find the officially accepted version on arXiv here.

The third and final paper this week is “Primordial black holes in cosmological simulations: growth prospects for supermassive black holes” by Lewis R Prole, John A Regan, Daxal Mehta & Peter Coles (National University of Ireland, Maynooth) and Pratika Dayal (Groningen, NL). This one was published in Astrophysics of Galaxies folder on Thursday 28th August 2025. You can read more about this paper here: basically it studies the growth of primordial black holes in the early Universe using numerical simulations, with implications for the subsequent formation of massive black holes.

The overlay is here:

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

And that’s all the papers for this week. It’s still a bit slow as we emerge from the summer vacations, but I expect things will start to pick up from now on.

#arXiv250403848v2 #arXiv250510619v2 #arXiv250611233v2 #AstrophysicsOfGalaxies #AttenuationFreeModel #CosmologyAndNonGalacticAstrophysics #DiamondOpenAccess #DiamondOpenAccessPublishing #JWST #LymanContinuum #massiveBlackHoles #OpenJournalOfAstrophysics #primordialBlackHoles #ProximityEffect #quasars #TheOpenJournalOfAstrophysics

Very interesting paper by @govertschilling for Sky and Telescope, on the discovery of the Big Ring by @morninglopez et al., with quotes from Jim Peebles (“I am hoping for anomalies that could prove to be empirical hints to a better theory”), Carlos Frenk, and Rien van de Weijgaert.

https://skyandtelescope.org/astronomy-news/astronomers-find-big-ring-1-3-billion-light-years-across/

#cosmology #bigring #giantarc #galaxies #quasars #standardmodel #ɅCDM #JimPeebles #NobelPrize #physics #BigBang #astronomy #astrophyscis #astrodon #science #space #news #research #STEM

Check out Dr Becky Smethurst's latest Night Sky News #video, wherein she reviews the #discovery of the #BigRing of #galaxies (feat. @morninglopez) and a series of #JWST papers ruling out a likely culprit of the #HubbleTension (feat. @gdanandofficial)

https://youtu.be/3NeKR7bqolY

#cosmology #astronomy #astrophysics #astrodon #news #drbecky #drbeckysmethurst #youtube #youtuber #scicomm #science #communication #sciencecommunication #space #research #giantarc #quasars #southpolewall #nasa #physics

The ingredients of a cosmological mystery: Big Ring, Giant Arc, Sloan Great Wall, South Pole Wall, Clowes-Campusano Large Quasar Group, Laniakea Supercluster, the dark flow, Sir Roger Penrose's Conformal Cyclic Cosmology, cosmic strings, ...
https://www.space.com/big-ring-galactic-superstructure-celestial-anomaly

#cosmology #bigring #giantarc #sloangreatwall #southpolewall #ClowesCampeanoLQG #quasars #laniakea #supercluster #laniakeasupercluster #galaxies #darkflow #penrose #rogerpenrose #CCC #cycliccosmology #cosmicstrings #astronomy #space

Great paper by Mirjam Guesgen for @Motherboard @VICENews on the discovery of the Big Ring

On the proximity of this structure with the Giant Arc:
“Identifying two extraordinary ultra-large structures in such close configuration raises the possibility that together they form an even more extraordinary cosmological system.” @morninglopez (co-author of the discovery)

https://www.vice.com/en/article/m7bwea/scientists-discover-big-ring-ultra-large-structure-in-space

#bigring #giantarc #galaxies #quasars #sdss #cosmology #astronomy #astrophysics #astrodon #space #science

Galaxy ring discovery challenges thinking on universe | BBC News
https://youtu.be/OV9BHDvBi-0

#bigring #giantarc #galaxies #quasars #universe #cosmicstrings #cosmology #cosmography #astronomy #astrophysics #astrodon #space #science #research

The discovery of the Big Ring makes it to the frontpage of the Financial Times!

"This Big Ring of galaxies and galaxy clusters joins an expanding catalogue of mammoth structures that defy scientific expectation."

🔭 Alexia Lopez @morninglopez, Roger Clowes @rgclowes, and Gerard Williger
✍️ Anjana Ahuja

https://www.ft.com/content/128ea9a2-5544-4e3c-b23b-874d5a9190b0

#bigring #giantarc #galaxies #quasars #universe #cosmicstrings #cosmology #cosmography #astronomy #astrophysics #astrodon #space #science #research #ft #financialtimes

#BenMiles - Did #Time Really Pass More Slowly In The Past?

https://www.youtube.com/watch?v=4pUgMqB1tdo&ab_channel=DrBenMiles

#Philosophy #PhilosophyOfScience #PhilosophyOfTime #GR #GeneralRelativity #ReferenceFrame #FrameOfReference #TimeDilation #Gravity #EventHorizon #Infinity #BigBang #Quasar #Quasars #DrBenMiles