Structure of Accretion Disks with Optically Thick--Optically Thin Transitions

Details Structure of Accretion Disks with Optically Thick--Optically Thin Transitions Structure of Accretion Disks with Optically Thick--Optically Thin Transitions

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...456..119a&link_type=abstract

Astrophysical Journal v.456, p.119

Physics

27

Accretion, Accretion Disks, Black Hole Physics, Radiation Mechanisms: Thermal

Scientific paper

We present here the solution for accretion disk structure, which describes continuously the transition between optically thick and optically thin disk regions. We show that the disk structure equations without advection, used here, give two branches of solutions which do not intersect for L < Lb ≲ 0.6LEdd for α = 1.0 and MBH = 108 Msun. For larger luminosities, there are no global solutions of the equations without advection. We suggest, as one of the possibilities, that advection becomes important even before, at luminosities ˜0.1LEdd, when the inner disk regions become unstable as a result of radiation pressure dominance and induce the transition from optically thick to optically thin disk in the global solution.

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