Probing Dark Matter in Draco with X-Ray Binaries

Details Probing Dark Matter in Draco with X-Ray Binaries Probing Dark Matter in Draco with X-Ray Binaries

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...81d&link_type=abstract

XMM-Newton Proposal ID #06031901

Physics

Galaxies, Galactic Surveys, Draco (Dsph)

Scientific paper

The dwarf spheroidal (dSph) galaxies in the Local Group are of considerable interest because of their unusually high mass-to-luminosity (M/L) ratios. The elevated M/L ratios have led to claims of the presence of extraordinary amounts of Dark Matter (DM) in the dSph galaxies. We propose a 70ks X-ray observation of Draco in order to search for quiescent low-mass x-ray binaries (qLMXBs). These data offer the potential for an independent estimate of the amount of DM in Draco and provide an opportunity to test alternative models that employ initial mass function (IMF) variations and internal dynamics of stellar populations to explain the observed M/L ratios.

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