Observational Insights Into the Dependence of Quasar Accretion Disk Structure on Black Hole Mass and Accretion Rate
Research output: Contribution to journal › Journal article › Research › peer-review
I will discuss recent work on using the X-ray and optical properties of
a sample of 318 radio-quiet quasars to investigate the dependence quasar
accretion disk structure on black hole mass and accretion rate.
Specifically, we studied the dependence of the ratio of quasar optical
flux to X-ray flux on black hole mass and Eddington ratio, as well as
the dependence of the X-ray spectral slope on black hole mass and
Eddington ratio. We find evidence that quasars emit a smaller fraction
of their bolometric luminosity in the X-rays as black hole mass and
accretion rate increase. In addition, we find evidence that the X-ray
spectral slope displays a non-monotonic dependence on black hole mass
and accretion rate. I will discuss our results within the context of
accretion models with comptonizing corona, and discuss the implications
for quasar feedback.
This work was supported in part by NSF grant AST03-07384.
Original language | English |
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Journal | Bulletin of the American Astronomical Society |
Volume | 211 |
Pages (from-to) | 947- |
ISSN | 0002-7537 |
Publication status | Published - 1 Dec 2007 |
Externally published | Yes |
ID: 229915740