EFFECTS OF FLUID COMPOSITION ON SPHERICAL FLOWS AROUND BLACK HOLES
EFFECTS OF FLUID COMPOSITION ON SPHERICAL FLOWS AROUND BLACK HOLES
复制标题
流体成分对黑洞周围球状流动的影响
DOI：
10.1088/0004-637x/694/1/492
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
D. Ryu
中科院分区：
文献类型：
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作者：
I. Chattopadhyay;D. Ryu
研究了完全电离的多组分流体在非旋转黑洞周围的稳定的球对称绝热吸积和风流动，这些流体由相对论状态方程描述。我们表明，多变指数取决于温度以及流体的组成，所以组成是重要的流动的解决方案。我们证明了具有不同组成的流体可以产生显著不同的溶液，即使它们具有相同的音速点，或者它们以相同的比能量或相同的温度开始。然后，我们指出了库仑弛豫时间可以大于动力学时间，并讨论了这一结果的意义。
Steady, spherically symmetric, adiabatic accretion and wind flows around nonrotating black holes were studied for fully ionized, multicomponent fluids, which are described by a relativistic equation of state. We showed that the polytropic index depends on the temperature as well as on the composition of fluids, so the composition is important to the solutions of the flows. We demonstrated that fluids with different composition can produce dramatically different solutions, even if they have the same sonic point, or they start with the same specific energy or the same temperature. Then, we pointed that the Coulomb relaxation times can be longer than the dynamical time in the problem considered here, and discussed the implication.