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Hot Gas and AGN Feedback in Galaxies and Nearby Groups

Published online by Cambridge University Press:  17 July 2013

Christine Jones ,
William Forman ,
Akos Bogdan ,
Scott Randall ,
Ralph Kraft  and
Eugene Churazov
Christine Jones
Affiliation:
Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA email: cjones@cfa.harvard.edu, wforman@cfa.harvard.edu, abodgan@cfa.harvard.edu, srandall@cfa.harvard.edu, rkraft@cfa.harvard.edu
William Forman
Affiliation:
Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA email: cjones@cfa.harvard.edu, wforman@cfa.harvard.edu, abodgan@cfa.harvard.edu, srandall@cfa.harvard.edu, rkraft@cfa.harvard.edu
Akos Bogdan
Affiliation:
Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA email: cjones@cfa.harvard.edu, wforman@cfa.harvard.edu, abodgan@cfa.harvard.edu, srandall@cfa.harvard.edu, rkraft@cfa.harvard.edu
Scott Randall
Affiliation:
Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA email: cjones@cfa.harvard.edu, wforman@cfa.harvard.edu, abodgan@cfa.harvard.edu, srandall@cfa.harvard.edu, rkraft@cfa.harvard.edu
Ralph Kraft
Affiliation:
Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA email: cjones@cfa.harvard.edu, wforman@cfa.harvard.edu, abodgan@cfa.harvard.edu, srandall@cfa.harvard.edu, rkraft@cfa.harvard.edu
Eugene Churazov
Affiliation:
Max Planck Institute for Astrophysik, Karl-Schwarzchild-Str. 1., Garching, Germany email: echurazov@mpa-garching.mpg.de
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Abstract

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Massive galaxies harbor a supermassive black hole at their centers. At high redshifts, these galaxies experienced a very active quasar phase, when, as their black holes grew by accretion, they produced enormous amounts of energy. At the present epoch, these black holes still undergo occasional outbursts, although the mode of their energy release is primarily mechanical rather than radiative. The energy from these outbursts can reheat the cooling gas in the galaxy cores and maintain the red and dead nature of the early-type galaxies. These outbursts also can have dramatic effects on the galaxy-scale hot coronae found in the more massive galaxies. We describe research in three areas related to the hot gas around galaxies and their supermassive black holes. First we present examples of galaxies with AGN outbursts that have been studied in detail. Second, we show that X-ray emitting low-luminosity AGN are present in 80% of the galaxies studied. Third, we discuss the first examples of extensive hot gas and dark matter halos in optically faint galaxies.

Keywords

galaxies: nucleigalaxies: bulgesgalaxies: ISM X-rays: galaxies: clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S295: The intriguing life of massive galaxies , August 2012 , pp. 257 - 260
Copyright
Copyright © International Astronomical Union 2013 

References

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