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X-ray constraints on the number of stellar mass black holes in the inner parsec

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conference contribution
posted on 2015-03-24, 11:19 authored by Patrick Deegan, Sergei Nayakshin
Due to dynamical friction stellar mass black holes should form a cusp in the inner parsec. Calculations [5, 6] show that approximately 20 thousand black holes would be present in a sphere with radius of about a parsec around Sgr A*. The presence of these objects opens up the possibility that they might be accreting ''cool'' gas (i.e. the Minispiral) as discussed by Morris [6]. Here we calculate the X-ray emission expected from these black holes as a method to constrain their population. We find that the data limits the total number of such black holes to around 10 - 20 thousand. Even a much smaller number of such black holes, i.e. 5 thousand, is sufficient to produce several sources with X-ray luminosity above Lx ~ 1033 erg s−1 at any one time. We suggest that some of the discrete X-ray sources observed by Muno [7] with Chandra in the inner parsec may be such ''fake X-ray binaries''.

History

Citation

Galactic Center Workshop 2006: From the Center of the Milky Way to Nearby Low-Luminosity Galactic Nuclei, 2006, 54, pp. 306-310 (5)

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Source

Galactic Center Workshop From the Center of the Milky Way to Nearby Low-Luminosity Galactic Nuclei, Bad Honnef, GERMANY

Version

  • VoR (Version of Record)

Published in

Galactic Center Workshop 2006: From the Center of the Milky Way to Nearby Low-Luminosity Galactic Nuclei

Publisher

IOP Publishing

issn

1742-6588

eissn

1742-6596

Available date

2015-03-24

Publisher version

http://iopscience.iop.org/1742-6596/54/1/048

Editors

Schodel, R.;Bower, G. C.;Muno, M. P.;Nayakshin, S.;Ott, T.

Temporal coverage: start date

2006-04-18

Temporal coverage: end date

2006-04-22

Language

en

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