Resolving the Dark Matter in a Normal Elliptical Galaxy

Details Resolving the Dark Matter in a Normal Elliptical Galaxy Resolving the Dark Matter in a Normal Elliptical Galaxy

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.2052h&link_type=abstract

Chandra Proposal ID #07610802

Physics

Chandra Proposal Id #07610802

Scientific paper

We propose a total 100ks observation of the normal, isolated, elliptical galaxy NGC720 in order to place definitive constraints upon the dark matter (DM) halo in such a system. Existing Chandra and XMM observations of this object provide a tantalizing hint of the role baryonic dissipation plays in shaping the profile of a dark matter halo. Our observation will enable us to discriminate between different galaxy formation scenarios at high significance, and to measure the mass profile deep into the DM halo, a crucial test for the Universal mass profile predicted by simulations. We will also be able to investigate the long-term variability of the remarkable ULX population in NGC720. This will provide a valuable insight into the nature of LMXB ULX, hitherto poorly studied as a class.

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