The Complex X-ray Morphology of NGC 7618: A Major Group-Group Merger in the Local Universe?

Details The Complex X-ray Morphology of NGC 7618: A Major Group-Group Merger in the Local Universe? The Complex X-ray Morphology of NGC 7618: A Major Group-Group Merger in the Local Universe?

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2222m&link_type=abstract

Chandra Proposal ID #08800042

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Chandra Proposal Id #08800042

Scientific paper

We propose to observse the cores of the nearby (74 Mpc) merging groups NGC 7618 and UGC 12491 with Chandra/ACIS-S to study the hydrodynamics of the group-group merger process. Group-group mergers play a key role in the formation of structure in the universe. Our goal is to map the thermodynamic parameters of the gas in the cores, search for evidence of shocks and other sharp surface brightness discontinuities, and study the effects of the merger on the central galaxies. An AO-1 snapshot of NGC 7618 revealed a sharp surface brightness discontinuity in the gas. This is likely due to a sharp discontinuity in the elemental abundance and is the result of `sloshing' of the core.

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