Results 31 to 40 of about 55,785 (258)
Similar Signatures of Coplanar Gas Inflow and Disk Warps in Galactic Gas Kinematic Maps
The Astrophysical Journal, 2023 Hydrodynamic simulations suggest that galactic gas disks form when coplanar gas spirals into the inner regions of the disk. We recently presented a simple modified accretion disk model of viscous galactic disks in which star formation is fed by a radial ...
Enci Wang, Simon J. Lilly
doaj +1 more source
CONNECTION BETWEEN THE ACCRETION DISK AND JET IN THE RADIO GALAXY 3C 111 [PDF]
The Astrophysical Journal, 2011 We present the results of extensive multi-frequency monitoring of the radio galaxy 3C 111 between 2004 and 2010 at X-ray (2.4--10 keV), optical (R band), and radio (14.5, 37, and 230 GHz) wave bands, as well as multi-epoch imaging with the Very Long Baseline Array (VLBA) at 43 GHz.
Chatterjee, Ritaban +15 more
openaire +5 more sources
Radiation Transport Two-temperature GRMHD Simulations of Warped Accretion Disks
The Astrophysical Journal Letters, 2023 In many black hole (BH) systems, the accretion disk is expected to be misaligned with respect to the BH spin axis. If the scale height of the disk is much smaller than the misalignment angle, the spin of the BH can tear the disk into multiple ...
M. T. P. Liska +4 more
doaj +1 more source
ACCRETION-DRIVEN TURBULENCE AND THE TRANSITION TO GLOBAL INSTABILITY IN YOUNG GALAXY DISKS [PDF]
, 2009 A simple model of gas accretion in young galaxy disks suggests that fast turbulent motions can be driven by accretion energy for a time tacc ∼ 2(ϵ0.5GM2/ξV3)0.5 where ϵ is the fraction of the accretion energy going into disk turbulence, M and V are the ...
B. Elmegreen, A. Burkert
semanticscholar +1 more source
Galaxies, 2015 I discuss my latest observational data and ideas about decoupled gaseous subsystems in nearby lenticular galaxies. As an extreme case of inclined gaseous disks, I demonstrate a sample of inner polar disks, derive their incidence, about 10% among the ...
Olga Sil’chenko
doaj +1 more source
Gas Accretion Can Drive Turbulence in Galaxies
The Astrophysical Journal, 2023 The driving of turbulence in galaxies is deeply connected with the physics of feedback, star formation, outflows, accretion, and radial transport in disks.
John C. Forbes +13 more
doaj +1 more source
An Accretion Disk Model for the Innermost 200PC of the Galaxy [PDF]
International Astronomical Union Colloquium, 1994 AbstractWe demonstrate that it is possible to understand observed radial velocities of molecular clouds close to the Galactic Center as being due to motion of this material in an accretion disk. Our models indicate a stationary disk with a radial mass flow rate of 10-1.8 Mʘ/yr with a viscosity of 1.9 · 103 pc km/s at 100 pc from the Galactic Center and
W.J. Duschl, S.v. Linden, P.L. Biermann
openaire +1 more source
Shadows, rings and optical appearance of a magnetically charged regular black hole illuminated by various accretion disks [PDF]
Journal of Cosmology and Astroparticle PhysicsThe Event Horizon Telescope (EHT) imaging of the supermassive black holes at the centers of Messier 87 galaxy (M87) and the Milky Way galaxy (Sgr A) marks a significant step in observing the photon rings and central brightness depression that define the ...
S. Zare +4 more
semanticscholar +1 more source
Alignment of Magnetized Accretion Disks and Relativistic Jets with Spinning Black Holes [PDF]
Science, 2012 Black Hole Alignment In interpreting observations of black holes, it is important to assess the extent to which the accretion disks around black holes and the jets that they produce align with the spin of the black hole. Based on numerical simulations of
J. McKinney +2 more
semanticscholar +1 more source
Lopsided Spiral Galaxies and a Limit on the Galaxy Accretion Rate [PDF]
, 1996 We present a measurement of lopsidedness for the stellar disks of 60 field spiral galaxies in terms of the azimuthal m = 1 Fourier amplitude, A1, of the stellar light.
D. Zaritsky, H. Rix
semanticscholar +1 more source