Query : 2017A&A...608A.114W

2017A&A...608A.114W - Astronomy and Astrophysics, volume 608A, 114-114 (2017/12-1)

Hot accretion flow with anisotropic viscosity.

WU M.-C., BU D.-F., GAN Z.-M. and YUAN Y.-F.

Abstract (from CDS):

In extremely low accretion rate systems, the ion mean-free path can be much larger than the gyroradius. Therefore, gas pressure is anisotropic with respect to magnetic field lines. The effects of pressure anisotropy can be modeled by an anisotropic viscosity with respect to magnetic field lines. Angular momentum can be transferred by anisotropic viscosity. In this paper, we investigate hot accretion flow with anisotropic viscosity. We consider the case that anisotropic viscous stress is much larger than Maxwell stress. We find that the flow is convectively unstable. We also find that the mass inflow rate decreases towards a black hole. Wind is very weak; its mass flux is 10-15% of the mass inflow rate. The inward decrease of inflow rate is mainly due to convective motions. This result may be useful to understand the accretion flow in the Galactic Center Sgr A* and M 87 galaxy.

Abstract Copyright: © ESO, 2017

Journal keyword(s): accretion, accretion disks - black hole physics - hydrodynamics - ISM: jets and outflows - conduction - conduction

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6649 3
2 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12914 0
3 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3867 3

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