Fitting multi-wavelength continuum of AGN with improved accretion disk models
We present fits to the UV-Optical-IR spectra of 60 quasars and active galactic nuclei using improved black hole accretion disk models. For both Kerr and Schwarzschild black holes, we calculated the effects of inclination, including Doppler boosting, gravitational focusing, and gravitational redshift, on the observed disk spectra. In the Kerr case, a simple inverse relation was found between the inferred black hole mass and the assumed inclination angle, while the inferred accretion rate (M(D/yr) remains constant. Disk spectra calculated with non-LTE stellar atmospheres instead of blackbodies do not reproduce the observations as well. Low-redshift Seyfert galaxies have relatively low accretion rates, only a few percent of their Eddington luminosities (LEdd), while the most luminous quasars are accreting nearer their Eddington limits.
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