The Dark Matter Profile of the Isolated Elliptical Galaxy NGC 1521

Details The Dark Matter Profile of the Isolated Elliptical Galaxy NGC 1521 The Dark Matter Profile of the Isolated Elliptical Galaxy NGC 1521

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop...83b&link_type=abstract

XMM-Newton Proposal ID #05525101

Mathematics

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Galaxies, Galactic Surveys, Ngc 1521, Xmm-Newton Proposal Id #05525101

Scientific paper

NGC 1521 is an isolated elliptical galaxy recently discovered in an XMM-AO6 pilot survey to search for optimal targets for X-ray studies of dark matter on the galaxy scale. We request a deep (110 ks) follow-up observation to map its dark matter profile in detail out to a radius of ~140 kpc (~0.3 r_vir), extending out farther in the halo than achieved to date using X-rays on the galaxy scale. We will constrain the concentration and virial mass to within +/- 15% (90% conf.) and compare to the predictions from cosmological simulations, and obtain an independent measurement of the stellar M/L. This observation of NGC 1521 would be a key addition to the handful of elliptical galaxies which currently possess interesting X-ray constraints on their dark matter properties.

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