AXAF Observations of Clusters with Radio Halos

Details AXAF Observations of Clusters with Radio Halos AXAF Observations of Clusters with Radio Halos

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop...16d&link_type=abstract

Chandra Proposal ID #01800225

Computer Science

Chandra Proposal Id #01800225

Scientific paper

Cluster mergers are thought to drive the X-ray evolution of clusters, but to fully understand these events we need to study young mergers. Classical signatures of a merger can last for up to 10^9 yrs. Radio halos, which are thought to be short lived (<10^8 yrs), are now thought to be powered by mergers. This makes these halos ideal indicators of a young merger. Furthermore, irregular radio halos are thought to be much younger than symmetric halos. The clusters with irregular radio halos and high quality X-ray data (A2256 & A754) have had anomalously hot gas (kT >> 8.5 keV) detected in them. We propose to obtain AXAF data for the recent-merger candidate A2255, a cluster with an irregular radio halo and evidence from the ROSAT and ASCA data of an anomalously hot component.

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