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Probing dark matter with X-ray binaries

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journal contribution
posted on 24.10.2012, 09:21 by W. Dehnen, A. King
Low-mass X-ray binaries (LMXBs), which occur in old stellar populations, have velocities exceeding those of their parent distribution by at least 20 km s−1. This makes them ideal probes for dark matter, in particular in dwarf spheroidals (dSph), where the LMXBs should penetrate well outside the visible galaxy. We argue that the most likely explanation of the observation of LMXBs in the Sculptor dSph by Maccarone et al. is the presence of a dark matter halo of ≳109 M⊙, corresponding to a total-mass to light ratio of ≳600 (M/LV)⊙. In this case there should be an extended halo of LMXBs which may be observable.

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Citation

Monthly Notices of the Royal Astronomical Society: LETTERS, 2006, 367 (1)

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society: LETTERS

Publisher

Royal Astronomical Society (RAS)

issn

1745-3933

Copyright date

2006

Available date

24/10/2012

Publisher version

http://mnrasl.oxfordjournals.org/content/367/1/L29

Language

en

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