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X-ray, optical, and radio properties of quasarsA sample of 26 low-redshift quasars was examined for relationships between X-ray luminosity and optical spectroscopic features; all quasars were observed with the Einstein Observatory and with the IDS on the Lick 3 meter telescope. Evidence is found for correlations between quasar X-ray luminosity and both optical continuum luminosity and H-beta luminosity. In the latter case, there is a smooth relationship connecting quasars, Seyfert 1, and Seyfert 2 galaxies. For the quasars in this sample, there is also a strong correlation between optical continuum luminosity and both the H-beta luminosity and equivalent width. Evidence is also found for a weak correlation between alpha-prime (ox), the mean continuum spectral index between 5000 A and 2 keV, and Fe II equivalent width, H-beta equivalent width, H-beta line width at zero intensity, and the ratio of H-beta equivalent width to its line width at zero intensity.
Document ID
19820053273
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Blumenthal, G. R.
(Lick Observatory Santa Cruz, CA, United States)
Keel, W. C.
(Lick Observatory Santa Cruz, CA, United States)
Miller, J. S.
(Lick Observatory Santa Cruz, CA, United States)
Date Acquired
August 10, 2013
Publication Date
June 15, 1982
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
82A36808
Funding Number(s)
CONTRACT_GRANT: NAG8-352
CONTRACT_GRANT: NSF AST-80-08246
CONTRACT_GRANT: NSF AST-80-19322
Distribution Limits
Public
Copyright
Other

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