Supersonic and subsonic flows in general relativistic radiation hydrodynamics

Autor:	Malec, Edward, Karkowski, Janusz, Roszkowski, Krzysztof, Swierczynski, Zdobyslaw
Rok vydání:	2008
Předmět:	Astrophysics General Relativity and Quantum Cosmology
Druh dokumentu:	Working Paper
Popis:	We analyze stationary accretion of selfgravitating 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. Comment: 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0804.3898 Zobrazit plný text záznamu View this record from Arxiv