The Shapes of Dark Matter Halos

Details The Shapes of Dark Matter Halos The Shapes of Dark Matter Halos

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..884b&link_type=abstract

Chandra Proposal ID #03600335

Physics

Chandra Proposal Id #03600335

Scientific paper

We propose to measure the shape of the dark matter halo in the S0 galaxy NGC 1332. The X-ray isophote shapes of early-type galaxies probe both the shape and radial mass distribution essentially independently of the temperature profile of the hot gas. With an 80ks ACIS-S observation we will establish definitively whether a non-spherical dark matter halo exists in a disk galaxy, measure in detail the ellipticity and radial density profile of the halo, and determine the mass of the galaxy to within +/- 10% interior to the faintest isophotes detected by ROSAT. The high resolution of Chandra is vital for removing any discrete sources, particularly near the center. These measurements will provide crucial tests of models of the nature of the dark matter and the formation of galactic structure.

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