Mapping Dark Matter in a Colling Flow Cluster and a Dark Clump

Details Mapping Dark Matter in a Colling Flow Cluster and a Dark Clump Mapping Dark Matter in a Colling Flow Cluster and a Dark Clump

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop.1022g&link_type=abstract

Chandra Proposal ID #03801021

Physics

Chandra Proposal Id #03801021

Scientific paper

We propose a 35 ks ACIS-I observation of the field of Abell 1942, a relaxed, luminous (Lx ~ 1.e45 erg/s, 2-10 keV) cluster at z=0.22. We have two objectives. We will measure the cluster's dark matter profile to within 50 kpc of the cluster core, with the aim of constraining the cross-section for dark matter self-interaction. We will also look for low-surface brightness X-ray emission from an intriguing, dark (M/L > 450) mass concentration lying near Abell 1942 on the sky which was recently discovered in a weak lensing study by Erben and co-workers. Our failure to detect X-ray emission from the clump would rule out its association with a poor group at the cluster redshift or with a moderately luminous cluster at z=1.

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