The Sombrero: The First X-Ray-Source Map of a Galaxy Halo

Details The Sombrero: The First X-Ray-Source Map of a Galaxy Halo The Sombrero: The First X-Ray-Source Map of a Galaxy Halo

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop...77d&link_type=abstract

XMM-Newton Proposal ID #06519701

Physics

Galaxies, Galactic Surveys, M104 Fov 1

Scientific paper

Although dominated by dark matter, galaxy halos also harbor stars. The spatial and age distributions of halo stars hold clues to processes such as the tidal disruption of dwarf galaxies (DGs). Because stars in the halo produce x-ray emission, studying the halo's x-ray sources (XRSs), which are far brighter than typical stars, can help us explore the halo and trace its history. XMM-Newton has the sensitivity and wide-area coverage needed to map the halo XRS population of one of the most remarkable galaxies: the Sombrero (M104). We propose six 30-ksec exposures which will discover the extension of the large bulge population, as well as XRSs in globular clusters and DGs. We will search for optical counterparts to each XRS, to better understand its environment, nature, and possible origin.

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