Gas Density Discontinuities in Merging Clusters

Details Gas Density Discontinuities in Merging Clusters Gas Density Discontinuities in Merging Clusters

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..982m&link_type=abstract

Chandra Proposal ID #03800124

Physics

Chandra Proposal Id #03800124

Scientific paper

One of the new and unexpected Chandra discoveries is the existence of sharp edges, or gas density discontinuities, in the ICM of several clusters. Depending on the sign of the temperature jump across the discontinuity, the edges correspond to two different phenomena: either a sharp boundary of a moving, stripped subcluster remnant, or a bow shock (in only one known case). With Chandra's angular resolution, both phenomena offer unique insights into the cluster physics, including determining the gas bulk velocity, its acceleration, growth of plasma instabilities, strength and structure of magnetic fields, and thermal conductivity. We propose deep ACIS observations of three bright clusters whose images show the presence of such contact discontinuities and shock fronts.

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