Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21545803j&link_type=abstract
American Astronomical Society, AAS Meeting #215, #458.03; Bulletin of the American Astronomical Society, Vol. 42, p.483
Astronomy and Astrophysics
Astronomy
Scientific paper
Galaxies with bulges harbor a supermassive black hole at their centers. At high redshifts, these galaxies experience a very active phase, when these black holes produced enormous amounts of energy, likely fueled through galaxy mergers. Today, some of these supermassive black holes still undergo occasional outbursts that are seen through spectacular jets, along with cavities filled with buoyant plasma and shocks in the surrounding X-ray gas. This paper describes Chandra results for a sample of about 200 galaxies for which we measure the X-ray properties, including the X-ray emission from the supermassive black hole at the nucleus, as well as emission from the diffuse gas, stars and LMXB's. We detect low luminosity X-ray emission (< 1042 ergs/sec) from the nucleus in about 60% of the galaxies and radio emission from about 80% of the sample. We compare the X-ray and radio emission from the nucleus to the kinetic power of the outbursts as measured from the X-ray cavities found in the diffuse gas and find that, as for rich clusters, the kinetic power is much greater than the radiative power. We compare the radiative cooling of the hot gas in these galaxies to the kinetic power generated by their supermassive black holes. This work was supported by the Smithsonian Institution, the Chandra Science Center, and MPA.
Churazov Eugene
Forman William
Jones Christine
Lal Devendra
Murray Stephen S.
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