期刊
CLASSICAL AND QUANTUM GRAVITY
卷 33, 期 21, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/33/21/215012
关键词
accretion; black hole; global monopole; de Sitter; cosmological constant
类别
资金
- Scientific Research Projects Coordination Unit of Akdeniz University (BAP)
In this paper, we investigate the accretion on the Reissner-Nordstrom-anti-de-Sitter black hole with global monopole charge. We discuss the general solutions of accretion using the isothermal and polytropic equations of state for steady state, spherically symmetric, non-rotating accretion on the black hole. In the case of isothermal flow, we consider some specific fluids and derive their solutions at the sonic point as well. However, in the case of polytropic fluid we calculate the general expressions only, as there exists no global (Bondi) solutions for polytropic test fluids. In addition to this, the effect of fluid on the mass accretion rate are also studied. Moreover, the large monopole parameter beta greatly suppresses the maximum accretion rate.
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