The evolution of the gas content of galaxy groups

Details The evolution of the gas content of galaxy groups The evolution of the gas content of galaxy groups

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009an....330.1059w&link_type=abstract

Astronomische Nachrichten, Vol.330, Issue , p.1059

Astronomy and Astrophysics

Astronomy

2

Galaxies: Clusters: General, Galaxies: Evolution, Galaxies: Interactions, Intergalactic Medium

Scientific paper

We examine multiple facets of the evolution of the gas content of galaxy groups. Complementing building evidence that a tremendous amount of galaxy transformation takes place in the group environment we find evidence of similar transformation of the gas content. In dynamically young groups galaxy-galaxy interactions appear to be responsible for depositing large quantities of neutral gas into the intergalactic medium. The gas content of dynamically evolved groups, however, is characterized by extended halos of diffuse hot gas. We also find that groups may harbor significant quantities of heretofore undetected baryons and that feedback from AGN may be responsible for heating the intragroup medium.

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