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AGN feedback in galaxy groups: a joint GMRT/X-ray study

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arxiv 0909.0291 v1 pith:ESVNCGNP submitted 2009-09-01 astro-ph.CO

AGN feedback in galaxy groups: a joint GMRT/X-ray study

classification astro-ph.CO
keywords groupsdatagalaxyfeedbackgmrtinteractionx-rayaged
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present an ongoing study of 18 nearby galaxy groups, chosen for the availability of Chandra and/or XMM-Newton data and evidence for AGN/hot intragroup gas interaction. We have obtained 235 and 610 MHz observations at the GMRT for all the groups, and 327 and 150 MHz for a few. We discuss two interesting cases - NGC 5044 and AWM 4 - which exhibit different kinds of AGN/hot gas interaction. With the help of these examples we show how joining low-frequency radio data (to track the history of AGN outbursts through emission from aged electron populations) with X-ray data (to determine the state of hot gas, its disturbances, heating and cooling) can provide a unique insight into the nature of the feedback mechanism in galaxy groups.

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