Constraining accretion models for nearby supermassive black holes

Details Constraining accretion models for nearby supermassive black holes Constraining accretion models for nearby supermassive black holes

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.0214d&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #02.14; Bulletin of the American Astronomical Society, Vol. 32, p.1184

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Scientific paper

We examine the implications of the detection of a nuclear X-ray source in the cD galaxy NGC 6166 at the center of the cooling flow cluster Abell 2199. The galaxy has previously-reported evidence for a supermassive black hole in its nucleus with MBH ~ 109 Msun. The new constraints are obtained from Chandra observations. The remarkably low luminosity of the source, (L{x,2-10 keV} ~ 1041 erg s-1), despite its location in an extremely gas-rich enviroment, suggests that the accretion process around the central black hole has to occur at extremely low radiative efficiency. The Chandra observations, for the first time, allow us to constrain unequivocally advection-dominated accretion and jet models. Important implications for other similar 'dead-qso' sources are discussed. TDM is supported by a NASA - Chandra Postdoctoral Fellowship.

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