TRANSONIC AND SUBSONIC FLOWS IN GENERAL RELATIVISTIC RADIATION HYDRODYNAMICS

被引：0

作者：

Karkowski, Janusz ^{[1
]}

Malec, Edward ^{[1
,2
]}

Roszkowski, Krzysztof ^{[1
]}

Swierczynzki, Zdobyslaw ^{[3
]}

机构：

[1] Jagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, Poland

[2] UCC, Dept Phys, Cork, Ireland

[3] Pedag Univ, Krakow, Poland

来源：

ACTA PHYSICA POLONICA B | 2009年 / 40卷 / 02期

关键词：

SPHERICAL ACCRETION; BLACK-HOLES; SELFGRAVITATION; STARS; LUMINOSITY; EQUATIONS;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze stationary accretion of self gravitating gas onto a compact center within general-relativistic radiation hydrodynamics. Spherical symmetry and thin gas approximation are assumed. Numerical investigation shows that transonic flows exist for small redshifts and they cease to exist for high redshifts and high luminosities. There exist two branches of flows (subsonic or supersonic) that originate at a bifurcation point and that embrace the set of subsonic solutions. The morphology of the set of subsonic solutions is essentially independent of redshifts and flows that belong to their boundary provide estimates of the gas abundance of subsonic solutions. It appears that prescribed boundary data guarantee uniqueness only of the bifurcation point, and that the latter has maximal luminosity.

引用

页码：273 / 292

页数：20

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