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Journal Article

Luminosity, selfgravitation and nonuniqueness of stationary accretion

MPS-Authors

Malec,  Edward
Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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aa8212-07.pdf
(Publisher version), 178KB

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Citation

Karkowski, J., Malec, E., & Roszkowski, K. (2008). Luminosity, selfgravitation and nonuniqueness of stationary accretion. Astronomy and Astrophysics, 479(1), 161-166. doi:10.1051/0004-6361:20078212.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-6273-C
Abstract
We investigate newtonian description of accreting compact bodies with hard surfaces, including luminosity and selfgravitation of polytropic perfect fluids. This nonlinear integro-differential problem reduces, under appropriate boundary conditions, to an algebraic relation between luminosity and the gas abundance in stationary spherically symmetric flows. There exist, for a given luminosity, asymptotic mass and the asymptotic temperature, two sub-critical solutions that bifurcate from a critical point. They differ by the fluid content and the mass of the compact centre.