%0 Journal Article
%T Standing Rankine--Hugoniot Shocks in Black Hole Accretion Discs<br>Standing Rankine-Hugoniot Shocks in Black Hole Accretion Discs
%A GU Wei-Min
%A LU Ju-Fu
%A <br>顾为民
%A 卢炬甫
%J 中国物理快报
%D 2004
%I 
%X We study the problem of standing shocks in viscous disc-like accretion flows around black holes. For the first time we parametrize such a flow with two physical constants, namely the specific angular momentum accreted by the black hole j and the energy quantity K. By providing the global dependence of shock formation in the j-K parameter space, we show that a significant parameter region can ensure solutions with Rankine--Hugoniot shocks; and that the possibilities of shock formation are the largest for inviscid flows, decreasing with increasing viscosity, and ceasing to exist for a strong enough viscosity. Our results support the view that the standing shock is an essential ingredient in black hole accretion discs and is a general phenomenon in astrophysics, and that there should be a continuous change from the properties of inviscid flows to those of viscous ones.
%K 98
%K 61
%K Mw
%K 97
%K 60
%K Lf
%K 95
%K 30
%K Lz
%K 96
%K 50
%K Fm<br>固定冲击
%K 黑洞
%K 加速流
%K 比角动量
%K 天体物理学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=671C104383CBA6BC8C5B6E2C5A326D4D&yid=D0E58B75BFD8E51C&vid=659D3B06EBF534A7&iid=59906B3B2830C2C5&sid=3C16267DE2F9AAE4&eid=B0540F6E3E4A706D&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=18