Starbursts and Supercavities in Clusters of Galaxies

Details Starbursts and Supercavities in Clusters of Galaxies Starbursts and Supercavities in Clusters of Galaxies

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20345m&link_type=abstract

Spitzer Proposal ID #20345

Astronomy and Astrophysics

Astrophysics

Scientific paper

Evidence is mounting that AGN feedback injects significant energy into the massive hot atmospheres of large elliptical galaxies, groups, and clusters of galaxies. This inhibits accretion and limits the star formation that would otherwise occur in cooling flows. We propose to investigate this feedback process using Spitzer/IRS mid-IR spectral maps of six well studied cooling flow clusters. The maps will be used to obtain accurate measures of the star formation rate, dust distribution and AGN activity. These will be compared to measures of feedback power from shocks and relativistic-jet cavities in the X-ray emitting gas and the state of the hot gas in the vicinity of the AGN. Our prime target, MS0735.6+7421, has a pair of supergiant cavities and shocks that have deposited 6e61 erg into the surrounding gas. The central supermassive black hole grew in mass by roughly 1/3 during this outburst. The basic mechanisms of cooling and energy feedback which can be studied in the mid-IR in these systems are relevant to a wide range of galaxy astrophysics.

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