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The Behaviour of the CIV Emission Line Strength in Variable Seyfert I Galaxies

  • L. Colina
  • W. Wamsteker
Chapter
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)

Abstract

The variation of the CIV 1550A line strength in variable Seyfert I galaxies based on low resolution IUE data is discussed. The results suggest that the Baldwin-relation might not be a reliable distance indicator for QSO’s Seyfert I galaxies vary in a way indicating that the emission line gas is matter bounded when in a high state. For F-9 the transition from photon-bounded to matter bounded occurs at log{L(1350)} ≈ 29.7 erg/sec/Hz.

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Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • L. Colina
    • 1
  • W. Wamsteker
    • 2
    • 3
  1. 1.Space Astrophysics DivisionSSD-ESTECNoordwijkHolland
  2. 2.ESA IUE ObservatoryMadridSpain
  3. 3.Space Sciences Dept.Spain

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