Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21830901f&link_type=abstract
American Astronomical Society, AAS Meeting #218, #309.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Feedback between a central supermassive black hole (SMBH) and its host galaxy plays a key role in driving galaxy evolution and maintaining the dichotomy between red (and dead) galaxies and actively star-forming, blue galaxies. The improving angular resolution in X-ray astronomy, culminating with Chandra, has provided new insights into this feedback process in those systems with hot atmospheres including elliptical galaxies, groups and clusters. We discuss the details of the feedback process with specific examples including M87, NGC5813, and a sample of normal elliptical galaxies. Using the normal galaxy sample, we discuss the frequency of "active" galaxies, the radiative luminosity, outburst mechanical power, and Eddington ratio of the SMBHs in these galaxies. Finally, we discuss models of the outbursts that allow us to measure the outburst durations and the balance between shock heating and "cavity" heating.
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