Open AccessTime-dependent analysis of spherical accretion on to black holes
Author(s) -
L. Zampieri,
Joel C. Miller,
R. Turolla
Publication year - 1996
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-8711
pISSN - 0035-8711
DOI - 10.1093/mnras/281.4.1183
Subject(s) - physics , radiative transfer , accretion (finance) , radiative cooling , schwarzschild radius , thermal radiation , radiation , black hole (networking) , shock wave , schwarzschild metric , astrophysics , classical mechanics , mechanics , general relativity , optics , thermodynamics , computer network , routing protocol , routing (electronic design automation) , computer science , link state routing protocol
Results are presented from a time--dependent, numerical investigation ofspherical accretion onto black holes, within the framework of relativisticradiation hydrodynamics. We have studied the stability of self--consistent,stationary solutions of black hole accretion with respect to thermal andradiative perturbations and also the non--linear evolution of unstable, hightemperature models, heated by the hard radiation produced by the accretion flowitself in the inner region near to the horizon. In some cases, a hydrodynamicshock forms at around $10^3$--$10^4$ Schwarzschild radii, where Compton heatingexceeds radiative cooling. The calculations were made using a suitably designedradiation hydrodynamics code, in which radiative transfer is handled by meansof the PSTF moment formalism and which contains an original treatment of theradiation temperature equation.Comment: 14 pages, Plain TeX, 6 postscript figures, replaced version does not include the Blackwell Scientific Publications TeX Macros, to appear in MNRA
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