IUE observations of high-redshift quasars

Attention is given to the spectral energy distributions of nine high-redshift quasars between 1250 and 10,000 A. The distributions steepen shortward of about 1200 A in all but one object. The steepening's lack of correlation with QSO luminosity suggests that it arises from absorption by interve...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 281; no. 1; pp. 76 - 89
Main Authors Bechtold, J., Green, R. F., Weymann, R. J., Schmidt, M., Estabrook, F. B., Sherman, R. D., Wahlquist, H. D., Heckman, T. M.
Format Journal Article
LanguageEnglish
Published Legacy CDMS University of Chicago Press 01.06.1984
Subjects
Astronomy
Astrophysics
Earth, ocean, space
Exact sciences and technology
Quasars
Quasars. Active or peculiar galaxies, objects, and systems
Stellar systems. Galactic and extragalactic objects and systems. The universe
Quasar
Data table
Spectrophotometric observation
Energy distribution
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Summary:Attention is given to the spectral energy distributions of nine high-redshift quasars between 1250 and 10,000 A. The distributions steepen shortward of about 1200 A in all but one object. The steepening's lack of correlation with QSO luminosity suggests that it arises from absorption by intervening material along the line of sight. Reddening may contribute to the steepening of the QSO continua, if dust lies along the line of sight to the continuum source, and is difficult to assess quantitatively. In QSOs with redshift sufficiently high for Lyman-alpha to be observed at high resolution, it is possible to account for the observed continuum steepening by the Lyman continuum absorption corresponding to the narrow Lyman-alpha absorption lines seen.
Bibliography:CDMS
Legacy CDMS
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0004-637X
1538-4357
DOI:10.1086/162076