An Extended Hot Halo Gas Around M31

Details An Extended Hot Halo Gas Around M31 An Extended Hot Halo Gas Around M31

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop..151b&link_type=abstract

XMM-Newton Proposal ID #04040602

Other

Galaxies, Galactic Surveys, M31Nc2, Xmm-Newton Proposal 04040602

Scientific paper

Our nearest spiral galaxy neighbor, M31, has diffuse bulge emission and probably has an extended diffuse halo of hot gas, similar to that seen in other spiral galaxies. Unlike more distant spirals, where halo gas observations are photon-starved, a M31 halo will not suffer this problem, allowing the gas distribution to be measured and the temperature to be mapped with unprecedented accuracy. This will define halo gas properties, the disk-halo interface and it will be a powerful test of models. This X-ray halo can have a radial extent of 1 degree (10-15 kpc), so a mosaic of observations will be constructed along the minor axis, leveraging existing observations. By using overlapping fields, we will flat-field the data to the necessary precision.

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