The Evolution of Hot Gas in Early-Type Galaxies

Details The Evolution of Hot Gas in Early-Type Galaxies The Evolution of Hot Gas in Early-Type Galaxies

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...91b&link_type=abstract

XMM-Newton Proposal ID #06035301

Other

Galaxies, Galactic Surveys, Ngc 4853

Scientific paper

Chandra and XMM provide an excellent data set that defines the X-ray gas content of nearby early-type galaxies. This gas evolves with time, yet one model predicts that younger galaxies are more X-ray luminous while another model predicts the opposite. The evolution can be studied by observing younger early-type galaxies, but all of the local L* ellipticals are old, typically 10 Gyr. Fortunately, there are early-type galaxies with a major epoch of star formation in the past Gyr, the E+A galaxies. We propose to study the nearest E+A galaxies, a sample of 4 in the outskirts of the Coma cluster (two are know X-ray sources). These observations will determine the Lx from the gas, discriminating between the models and giving us insights into galaxy evolution.

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