First Results from a Catalog of Data Concerning AGN — FWHM and FWZI versus LO for CIV and Hβ

  • Monique Joly
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)


From a statistical analysis on a large sample of Seyfert 1 nuclei and quasars, I put into evidence the existence of an homogeneous class of objects defined by a FWHM(Hβ) larger than 1700 km/s. For these AGN, there is a tight correlation between FWZI(Hβ) and the optical luminosity. From this relation one can deduce that the radiation process in low luminosity object occurs far below the Eddington limit with an efficiency factor independant of the mass while at high luminosity the masses involved are very high. It is shown also that in low luminosity objects the CIV line arises in a region with higher velocity dispersion than Hβ.


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Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • Monique Joly
    • 1
  1. 1.Observatoire de Paris-MeudonMeudon Principal CedexFrance

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