Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...440..610s&link_type=abstract
Astrophysical Journal v.440, p.610
Astronomy and Astrophysics
Astronomy
23
Accretion, Accretion Disks, Galaxies: Nuclei, Radiation Mechanisms: Nonthermal, Ultraviolet: Galaxies, X-Rays: Galaxies
Scientific paper
Emission spectrum from an accretion disk for active galactic nuclei is obtained by solving the vertical structure and radiative transfer self-consistently and by integrating the local spectrum over radii. We found that even for moderate accretion rates, disks emit a significant portion of the total luminosity in UV through soft X-ray range; for the accretion rate close to the Eddington limit, soft X-ray luminosity for a 0.1-2.0 keV range amounts to 57%, 43%, and 33% of the total luminosity for a black hole mass of 107, 108, and 109 Msun, respectively. We compared our numerical results with lUE, Einstein, EXOSAT, and ROSAT observations of low-redshift quasars and Seyfert 1 galaxies and found that our results can statistically account for observations of the UV bump and soft X-ray excess simultaneously without exceeding the Eddington limit. We also performed a detailed spectral fit to the quasar H1821 + 643, for which the estimated values of the black hole mass and accretion rate are 1.5 × 109 Msun and 0.7LEdd, respectively.
Shimura Toshiya
Takahara Fumio
No associations
LandOfFree
Emission Spectrum Integrated over an Accretion Disk: Comparison with Observations of Active Galactic Nuclei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Emission Spectrum Integrated over an Accretion Disk: Comparison with Observations of Active Galactic Nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emission Spectrum Integrated over an Accretion Disk: Comparison with Observations of Active Galactic Nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1630947