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Magnetic Extraction of Energy from Accretion Disc Around a Rotating Black Hole |
| GONG Xiao-Long;WANG Ding-Xiong;YE Yong-Chun |
| Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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GONG Xiao-Long, WANG Ding-Xiong, YE Yong-Chun 2004 Chin. Phys. Lett. 21 1861-1864 |
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Abstract An analytical expression for the jet power extracted from the disc (JPEFD) is derived based on an equivalent circuit in black hole magnetosphere with a mapping relation between the radial coordinate of the disc and that of unknown astrophysical load. It turns out that this JPEFD is comparable with two other JPEFDs derived in the Poynting flux and hydrodynamic regimes, respectively. In addition, the relative importance of this JPEFD relative to the Blandford--Znajek power is discussed. It is shown that the BZ power is generally dominated by the JPEFD except in some extreme cases. Furthermore, we show that the JPEFD derived in our model can be well fitted with the jet power of 3C 273.
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| Keywords:
97.60.Lf
98.62.Mw
98.62.Js
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Published: 01 September 2004
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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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