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  Luminosity, selfgravitation and nonuniqueness of stationary accretion

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.

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Karkowski, Janusz1, Author
Malec, Edward2, Author
Roszkowski , Krzysztof1, Author
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1External Organizations, , , ou_persistent22              
2Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24012              

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 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.

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 Dates: 2008-02
 Publication Status: Published online
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 Identifiers: DOI: 10.1051/0004-6361:20078212
eDoc: 328172
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Title: Astronomy and Astrophysics
Source Genre: Journal
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Pages: - Volume / Issue: 479 (1) Sequence Number: - Start / End Page: 161 - 166 Identifier: ISSN: 1432-0746