Hot Accretion Disks Revisited
Abstract
All previous studies of hot (Tp 1010-1012 K), optically thin accretion disks have neglected either the presence of e+ e- pairs or advective cooling. Thus all hot disk models constructed previously have not been self-consistent. In this paper we calculate local disk models including pair physics, relevant radiative processes in the hot plasma, and the effect of advective cooling. We use a modification of the Björnsson & Svensson mapping method. We find that the role of e+ e- pairs in the structure of hot, optically thin accretion disks is far less significant than was previously thought. The improved description of the radiation-matter interactions provided in the present paper modify the previously obtained values of the critical parameters characterizing advectively dominated flows.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1996
- DOI:
- 10.1086/177587
- Bibcode:
- 1996ApJ...467...99B
- Keywords:
-
- ACCRETION;
- ACCRETION DISKS;
- BLACK HOLE PHYSICS;
- ELEMENTARY PARTICLES;
- PLASMAS;
- RADIATION MECHANISMS: NONTHERMAL