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Observational manifestations of accretion onto isolated black holes of different masses

Published online by Cambridge University Press:  01 August 2006

Sergey Karpov
Affiliation:
Special Astrophysical Observatory of Russian Academy of Sciences, Nizhniy Arkhyz, Karachaevo-Cherkessia, Russia, emial: [email protected]
Gregory Beskin
Affiliation:
Special Astrophysical Observatory of Russian Academy of Sciences, Nizhniy Arkhyz, Karachaevo-Cherkessia, Russia, emial: [email protected]
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Abstract

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The process of accretion onto the isolated black holes under the various conditions of the ISM and its observational manifestations are discussed. For the majority of the Galaxy volume the accretion rate is as low as 10−6–10−9 of Eddington one, and the accretion is spherically-symmetric. Such objects manifest itself as a weak optical and x-ray sources with featureless spectra and the significant variability of the emission.

For the BH located inside the dense molecular cloud the regime of accretion depends on its massand velocity. A massive (100–1000M⊙) BH born in the cloud or having low relative velocity, may manifest itself as a ultra-luminous x-ray source (ULX).

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

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