Cold molecular gas in cooling flow clusters of galaxies

Details Cold molecular gas in cooling flow clusters of galaxies Cold molecular gas in cooling flow clusters of galaxies

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..321s&link_type=abstract

In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A

Computer Science

Galaxies: Clusters: Cooling Flows, Methods: Observational, Techniques: Interferometry

Scientific paper

Cooling flows in the center of galaxy clusters have long been a puzzle, since the gas phases at the various temperatures are difficult to observe. A complex picture (bubbles, cavities, cold fronts) has been unveiled by X-ray data from Chandra and XMM-Newton: the hot gas does not cool regularly and steadily with spherical symmetry, but the cooling flow certainly fuels a massive black hole in the central galaxy, triggers AGN activity which reheats the intra-cluster gas. We have recently detected cold gas emission in several cooling flow clusters with the IRAM-30m, and we have shown, through CO(1-0) and CO(2-1) interferometer maps, a possible association of the cold gas (20K) with the cooling flow, in two clusters. Much more sensitivity and spatial resolution is required now to explore the cooling phenomenon, that will improve our knowledge on the galaxy formation scenarios.

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