The shape of the ultraviolet continuum of quasars

  • Anuradha P. Koratkar
  • Fu-Hua Cheng
  • C. Martin Gaskell
II. Polarization and Continuum Observation
Part of the Lecture Notes in Physics book series (LNP, volume 307)


We investigate the dependence of the UV spectral index (a) on luminosity, redshift, and radio properties of the quasar. We find that a is remarkably independent of luminosity. We confirm earlier results that there is a slight dependence of a on the radio properties and redshift, but believe that the latter is perhaps an optical selection effect. We find no evidence for intergalactic reddening.


Spectral Index Equivalent Width High Redshift Seyfert Galaxy Slight Dependence 
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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • Anuradha P. Koratkar
    • 1
  • Fu-Hua Cheng
    • 2
  • C. Martin Gaskell
    • 3
  1. 1.Astronomy ProgramState University of New YorkStony Brook
  2. 2.Lick ObservatoryUniversity of CaliforniaSanta Cruz
  3. 3.Astronomy DepartmentUniversity of MichiganAnn Arbor

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