Results 151 to 160 of about 55,785 (258)
Shock Waves in the Magnetic Reconnection in the Flares on the Accretion Disk of the Sgr A*
The Astrophysical JournalSgr A* often shows bright, episodic flares observationally, but the mechanism of the flares' intermittent brightening is not very clear. Many people believe the flares may be formed by the nonthermal particles, which can be a consequence of the magnetic ...
Tian-Le Zhao +3 more
doaj +1 more source
Disk Assembly of the Milky Way Suggested from the Time-resolved Chemical Abundance
The Astrophysical JournalBoth simulations and observations suggest that the disk assembly of galaxies is governed by the interplay between coplanar gas inflow, ex-planar gas outflow, and in situ star formation on the disk, known as the leaky accretion disk.
Enci Wang +3 more
doaj +1 more source
Supercritical accretion disks in ultraluminous X-ray sources and SS 433
, 2020 © 2015 Macmillan Publishers Limited. All rights reserved. The black hole mass and accretion rate in ultraluminous X-ray sources (ULXs) in external galaxies, whose X-ray luminosities exceed those of the brightest black holes in our Galaxy by hundreds and ...
Ueda Y. +4 more
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Self-Consistent Models of Accretion Disks
, 1997 The investigations of advection-dominated accretion flows (ADAFs), with emphasis on applications to X-ray binaries containing black holes and neutron stars is presented.
Narayan, Ramesh
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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
Gas accretion in galactic disks
, 2005 Evidence for the accretion of material in spiral galaxies has grown over the past years and clear signatures can be found in HI observations of galaxies.
van der Hulst, JM; id_orcid, Sancisi, R
core +2 more sources
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
doaj +1 more source
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
doaj +1 more source
Evidence for gas accretion in galactic disks [PDF]
, 2003 : Studies of the HI in galaxies have clearly shown that subtle details of the HI distribution and kinematics often harbour key information for understanding the structure and evolution of galaxies.
Sancisi, R., Van der Hulst, T.; id_orcid
core +2 more sources
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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