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A Toy Model for Advection Dominated Accretion Flows |
| WANG Ding-Xiong;LEI Wei-Hua; XIAO Kan |
| Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
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| Cite this article: |
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WANG Ding-Xiong, LEI Wei-Hua, XIAO Kan 2003 Chin. Phys. Lett. 20 965-968 |
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Abstract A toy disk model with advection dominated accretion onto a black hole is presented. The advection dominated accretion flows (ADAFs) are assumed to exist in the inner thick disk with rin < r < rout, and the disk is assumed to be geometrically thin for r > rout. Compared with Paczynski's toy model the thick disk is not limited to be 100% advective. It turns out that the inner radius rin depends not only on the outer radius rout but also on the ADAF parameters f and ε. The effects of the inner thick disk on the radiation efficiency and the temperature profile of the outer thin disk are discussed in details.
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| Keywords:
97.60.Lf
98.62.Mw
98.62.Js
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Published: 01 June 2003
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| PACS: |
97.60.Lf
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(Black holes)
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98.62.Mw
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(Infall, accretion, and accretion disks)
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98.62.Js
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(Galactic nuclei (including black holes), circumnuclear matter, and bulges)
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