Faint and soft X-ray binaries in three dwarf spheroidal galaxies

Details Faint and soft X-ray binaries in three dwarf spheroidal galaxies Faint and soft X-ray binaries in three dwarf spheroidal galaxies

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop..177o&link_type=abstract

XMM-Newton Proposal ID #05558703

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Leo I, Leo Ii, Xmm-Newton Proposal Id #05558703

Scientific paper

We propose to observe three nearby dwarf spheroidal (dSph) companions of the Milky Way. These galaxies host old populations with little or no contamination of recent star formation, and appear to have a huge dark matter content. They are the ideal Rosetta stones to probe theories of X-ray binary formation, type Ia progenitors evolution, and dark matter halos.Recent observations of four other dSph with Chandra and XMM-Newton have revealed a large number of X-ray sources in the fields, effected by small column density of neutral hydrogen N(H).Using deep optical and UV images, archival HST and GALEX exposures, and later spectroscopic follow-up, we will be able to determine the nature of the sources and whether they belong to the galactic populations.

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