Results 81 to 90 of about 352 (180)
FORGE'd in FIRE III: The IMF in Quasar Accretion Disks from STARFORGE
The Open Journal of AstrophysicsRecently, we demonstrated self-consistent formation of strongly-magnetized quasar accretion disks (QADs) from cosmological radiation-magnetohydrodynamic-thermochemical galaxy-star formation simulations, including the full STARFORGE physics shown ...
Philip F. Hopkins +5 more
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Probing the History of the Galaxy Assembly of the Counterrotating Disk Galaxy PGC 66551
The Astrophysical JournalStellar counterrotation in disk galaxies directly relates to the complex phenomenon of the disk mass assembly believed to be driven by external processes, such as accretion and mergers.
Ivan Yu. Katkov +6 more
doaj +1 more source
A Sandwich Model for Changing-look Active Galactic Nuclei
The Astrophysical JournalThe spectral variability of changing-look active galactic nuclei (CL-AGNs) occurred on timescales of years to tens of years, posing a significant challenge to the standard thin disk model. In this work, we propose a sandwich model, including an optically
Qian-Qi Ma +6 more
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The Lifetimes of High-redshift Quasars Suggest Magnetic Disk Support
The Astrophysical JournalIt has recently been suggested that a variety of data on active galactic nuclei (AGN) can be explained if AGN disks are supported against gravitational fragmentation by magnetic fields that are advected into the disk from the surrounding galaxy.
Jarrett Johnson +4 more
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Directly Tracking the Rebrightening of a Supermassive Black Hole Accretion Disk
The Astrophysical JournalAccretion onto supermassive black holes (SMBHs) powers the most luminous persistent sources in the Universe, the so-called active galactic nuclei, whose emission is characterized by two distinct spectral components: thermal optical/ultraviolet (UV ...
Riccardo Middei +14 more
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The Santa Barbara Binary−disk Code Comparison
The Astrophysical JournalWe have performed numerical calculations of a binary interacting with a gas disk, using 11 different numerical methods and a standard binary−disk setup.
Paul C. Duffell +15 more
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The Persistent Missing Mass Problem in Planet Formation
The Astrophysical Journal LettersRecent ground-based microlensing surveys suggest that our Galaxy may abound with small free-floating planets, potentially up to ∼21 such planets per star. We explore the implication of such possibility on the mass budget for planet formation.
Eve J. Lee +3 more
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Electromagnetic counterparts to massive black-hole mergers. [PDF]
Living Rev Relativ, 2022 Bogdanović T, Miller MC, Blecha L.
europepmc +1 more source
The Astrophysical Journal LettersWe revisit the spectral appearance of extended self-gravitating accretion disks surrounding compact central objects such as supermassive black holes. Using dust-poor opacities, we show that all optically thick disk solutions possess a universal outer ...
Yi-Xian Chen +8 more
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H i Observations of Giant Low Surface Brightness Galaxies
The Astrophysical JournalGiant low surface brightness (gLSB) galaxies are galaxies with extremely extended, faint, optical disks over 50 kpc in radius and have high total masses, which can reach 10 ^12 M _⊙ .
Philip Lah +7 more
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