Untangling Sombrero's X-ray Emission from Coronally Active Binaries, Cataclysmic Variables, LMXBs, and Hot Gas

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Chandra Proposal Id #09620250

Scientific paper

We propose a deep (180 ks) ACIS-I observation of the Sombrero galaxy. At a distance of 9 Mpc, this isolated, large bulge Sa galaxy, with a highly inclined disk and surprisingly little X-ray gas, offers a unique opportunity to study the diffuse emission and the point source population. Our primary goals are 1) to examine the contribution to the ISM of mass lost from stars and the energy input to drive a wind from type Ia SN and the central AGN and 2) to take a census of the bulge X-ray populations, including LMXBs, supersoft sources, and the unresolved emission from coronally active binaries (ABs) and CVs and measure their contribution to the diffuse X-ray emission. With ~160 expected globular cluster sources, we will derive the cluster luminosity function.

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