Optically thick accretion onto black holes |
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Authors: | Shuichi Tamazawa Kiyotaka Toyama Noboru Kaneko Yôrô Ôno |
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Institution: | (1) Dept. of Physics, Faculty of Science, Hokkaido University, Sapporo, Japan |
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Abstract: | Spherically symmetric, steady-state, optically thick accretion onto a nonrotating black hole with the mass of
is studied. The gas accreting onto the black hole is assumed to be a fully ionized hydrogen plasma withn
0=108 cm–3 andT
0=104 K far from the black hole, and a new approximate expression for the Eddington factor is introduced. The luminosity is estimated to beL=1.875×1033 erg s–1, which primarily arises from the optical surface (1) ofT104 K. The accretion flow is characterized by 1 and (v/c)10. In the optically thin region, the flow remains isothermal, and the increase of temperature occurs at 1. The radiative equilibrium is strictly realized at (v/c)10. |
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Keywords: | |
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