Transition from Standard Disk to Advection-dominated Accretion Flow

Details Transition from Standard Disk to Advection-dominated Accretion Flow Transition from Standard Disk to Advection-dominated Accretion Flow

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...538..295m&link_type=abstract

The Astrophysical Journal, Volume 538, Issue 1, pp. 295-306.

Physics

31

Accretion, Accretion Disks, Black Hole Physics

Scientific paper

We studied a global accretion flow model with a radial transition from outer standard disks to inner advection-dominated accretion flows. The height-integrated viscous hydrodynamic equations were solved numerically using radiative transfer equations. We found two kinds of solutions: (1) standard-disk solutions and (2) solutions with transitions from inner advection-dominated accretion flows to outer standard disks, thus confirming the recent results of Honma. We investigated in detail the thermal structure of the transition region, finding a series of transition solutions with a different transition radius for a given set of physical parameters. The transitions occur only when the efficiency of the energy transport by the turbulence is above a minimum value. The physical mechanism of the transition is also discussed.

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