HCG 90: the Formation of the X-Ray Medium?

Details HCG 90: the Formation of the X-Ray Medium? HCG 90: the Formation of the X-Ray Medium?

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop...75b&link_type=abstract

Chandra Proposal ID #01800500

Computer Science

Chandra Proposal Id #01800500

Scientific paper

At optical wavelengths Hickson Compact Group 90 exhibits an unprecedented amount of diffuse intracluster light whose total luminosity is approximately 40% of the group luminosity. Three luminous galaxies, including the hard X-ray source NGC 7172, are currently strongly interacting and merging, producing a substantial amount of tidal debris which comprises the intracluster light. Previous ROSAT HRI observations of HCG 90 hint at the presence of weak, diffuse X-ray emission. We propose to use the AXAF ACIS detector to acquire better data to confirm that HCG 90 has an extended region of X-ray emission with very low value of L_x/L_opt indicating that the ICM in this group is just now in the process of forming and heating as a direct response to strong galaxy-galaxy interactions.

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