Very Isolated Elliptical Galaxies: Merger Remnants?

Details Very Isolated Elliptical Galaxies: Merger Remnants? Very Isolated Elliptical Galaxies: Merger Remnants?

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..642s&link_type=abstract

Chandra Proposal ID #02600699

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Chandra Proposal Id #02600699

Scientific paper

Surprisingly, very isolated elliptical galaxies exist! Recent theoretical and observational evidence suggests that very isolated Es are the end-product of mergers in compact groups of galaxies. Specifically, the luminosity function for isolated Es has a significant excess of bright galaxies (some with cD-like luminosities: ≥2mag brighter than L(*) ) and one isolated E has a detected X-ray halo comparable to that of an entire group of galaxies. But other scenarios are possible for this one example, so we propose to test the merger hypothesis for isolated Es with CHANDRA + ACIS-S by observing 4 very isolated E galaxies with cD-like optical luminosities, and thus test the merger hypothesis for the formation of elliptical galaxies in general.

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