On angular momentum transport in convection-dominated accretion flows

Abstract

Convection-dominated accretion flow (CDAF) is a promising model to explain underluminous accreting black holes in X-ray binaries and galactic nuclei. I discuss effects of angular momentum transport in viscous hydrodynamical and MHD CDAFs. In hydrodynamical CDAFs, convection transports angular momentum inward, and this together with outward convection transport of thermal energy determine the radial structure of the flow. In MHD CDAFs, convection can transport angular momentum either inward or outward, depending on properties of turbulence in rotating magnetized plasma, which are not fully understood yet. Direction of convection angular momentum transport can affect the law of rotation of MHD CDAFs.

10 pages, will appear in ApJL

References in corpus (5)

• The Dynamical Structure of Nonradiative Black Hole Accretion Flows
• On the Nature of Angular Momentum Transport in Nonradiative Accretion Flows
• The Magnetohydrodynamics of Convection-Dominated Accretion Flows
• Numerical Models of Viscous Accretion Flows Near Black Holes
• Why Do AGN Lighthouses Switch Off?

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• First Simultaneous NIR/X-ray Detection of a Flare from SgrA*
• High energy gamma rays from the massive black hole in the Galactic Center
• The Flare Activity of SgrA*; New Coordinated mm to X-Ray Observations
• Modeling mm- to X-ray flare emission from SgrA*
• Collapsar Accretion and the Gamma-Ray Burst X-Ray Light Curve
• The extreme luminosity states of Sagittarius A*
• Long-term evolution of supercritical black hole accretion with outflows: a subgrid feedback model for cosmological simulations
• Unstable mass-outflows in geometrically thick accretion flows around black holes
• Supernovae Powered by Collapsar Accretion in Gamma-Ray Burst Sources
• Simulations of Accretion Powered Supernovae in the Progenitors of Gamma Ray Bursts
• Global dynamics of radiatively inefficient accretion flows: advection versus convection
• Self-similar structure of magnetized ADAFs and CDAFs
• Meridional circulation and reverse advection in hot thin accretion discs
• The dependence of the viscosity-parameter on the disk scale height profile
• Probing the Jet Turnover Frequency Dependence on Black Hole Mass and Mass Accretion Rate