The Halos of Post-Merger Ellipticals

Details The Halos of Post-Merger Ellipticals The Halos of Post-Merger Ellipticals

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..631d&link_type=abstract

Chandra Proposal ID #02600242

Computer Science

Chandra Proposal Id #02600242

Scientific paper

Studies with ROSAT suggest that post-merger ellipticals may be underluminous in X-rays. If they lack the extensive hot halos seen in typical ellipticals then this is a serious problem for the merger hypothesis. We propose to study the structure of the halos in four post-merger ellipticals with ACIS-S, to search for halo truncation and test the idea that halos are rebuilt after a merger by gas falling back from tidal tails. We will derive a new estimate of the post-merger age from the central cooling time, and study the metallicity distribution. Our results will be compared to those for normal, old ellipticals.

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