Results 91 to 100 of about 23,810 (131)
Coevolution of Supermassive Black Holes and Circumnuclear Disks
, 2008 We propose a new evolutionary model of a supermassive black hole (SMBH) and a circumnuclear disk (CND), taking into account the mass-supply from a host galaxy and the physical states of CND.
Antonucci R. +11 more
core +1 more source
Accretion onto disc galaxies via hot and rotating CGM inflows
Monthly Notices of the Royal Astronomical SocietyABSTRACT Observed accretion rates onto the Milky Way and other local spirals fall short of that required to sustain star formation for cosmological timescales. A potential avenue for this unseen accretion is a rotating inflow in the volume-filling hot phase ($\sim 10^6\, {\rm K}$) of the circumgalactic medium (CGM), as suggested by some ...
Jonathan Stern +7 more
openaire +2 more sources
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
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
doaj +1 more source
Electromagnetic signatures of supermassive black hole binaries resolved by PTAs
, 2013 Pulsar timing arrays (PTAs) may eventually be able to detect not only the stochastic gravitational-wave (GW) background of SMBH binaries, but also individual, particularly massive binaries whose signals stick out above the background.
Haiman, Zoltán, Tanaka, Takamitsu L.
core +1 more source
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
The evolution of active galactic nuclei and their spins
, 2013 Massive black holes (MBHs) in contrast to stellar mass black holes are expected to substantially change their properties over their lifetime. MBH masses increase by several order of magnitude over the Hubble time, as illustrated by Soltan's argument. MBH
Lasota, Jean-Pierre +3 more
core +3 more sources
Gas Evolution in Disk Galaxies : Disk Stability, Gas Accretion & The Impacts of Spiral Density Waves
, 2010 Diese Arbeit untersucht viele Aspekte der zeitlichen Entwicklung von Gas in Scheibengalaxien. Eine einfache und effektive Methode zur Initialisierung einer dreidimensionalen Gasscheibe in detailliertem Gleichgewicht wurde entwickelt. Mithilfe dieser Methode untersuchen wir theoretische Vorhersagen über Stabilität und 'Swing' Verstärkung ...
openaire +2 more sources
The Self-Regulated Growth of Supermassive Black Holes
, 2008 We present a series of simulations of the self--regulated growth of supermassive black holes (SMBHs) in galaxies via three different fueling mechanisms: major mergers, minor mergers, and disk instabilities.
Athanassoula E. +19 more
core +1 more source
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
doaj +1 more source