Advertisement

X-Ray Variability and Spectral Scaling: A Measure of BLR Sizes in AGN

  • A. Wandel
  • Th. Boller
Part of the Astrophysics and Space Science Library book series (ASSL, volume 218)

Abstract

We developed a new method of determination of the size of the broad emission-line region (BLR) in active galactic nuclei. This method relates the radius of the broad-line region of AGN to the soft X-ray luminosity and spectral index. Comparing the BLR distances calculated from our model to the BLR distances determined by reverberation mapping shows that our scaling law agrees with the R ~ L 1/2 empirical relation. Here we investigate a complimentary method of estimating the BLR distance — based on the Keplerian broadening of the emission lines and the central mass estimated from X-ray variability.

Keywords

Emission Line Central Mass Spectral Index Active Galactic Nucleus Black Hole Mass 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Boller, Th., Brandt, W.N., Fink, H. 1996, AA, 305, 53Google Scholar
  2. Kaspi, Sh. et.al. 1996, ApJ, 471, L75Google Scholar
  3. Peterson, B.M. in “Reverberation Mapping of AGN” eds. P.M. Gondhalekar, K.Horne, B.M.Peterson, SFASP 1995.Google Scholar
  4. Rees, M., Netzer H., Ferland, G.J. 1989. ApJ, 347, 640.CrossRefGoogle Scholar
  5. Wandel, A. and Mushotzky, R.F. 1986, ApJ, 306, L61.CrossRefGoogle Scholar
  6. Wandel, A. 1996, in “X-ray Imaging and Spectroscopy of Cosmic Hot Plasmas”, ed. F.Makino.Google Scholar
  7. Wandel, A. 1997, ApJ Letters, in press.Google Scholar
  8. Wandel, A. and Boller, Th.. 1997, AA, in press.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • A. Wandel
    • 1
  • Th. Boller
    • 2
  1. 1.Racah Inst.The Hebrew UniversityJerusalemIsrael
  2. 2.Max Planck Inst. fuer ExtraterrPhysik, GarchingGermany

Personalised recommendations