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Spectrophotometry of six broad absorption line QSOsSpectrophotometric observations of six broad absorption-line QSOs (BALQSOs) are presented. The continua and emission lines are compared with those in the spectra of QSOs without BALs. A statistically significant difference is found in the emission-line intensity ratio for (N V 1240-A)/(C IV 1549-A). The median value of (N V)/(C IV) for the BALQSOs is two to three times the median for QSOs without BALs. The absorption features of the BALQSOs are described, and the column densities and limits on the ionization structure of the BAL region are discussed. If the dominant ionization mechanism is photoionization, then it is likely that either the ionizing spectrum is steep or the abundances are considerably different from solar. Collisional ionization may be a significant factor, but it cannot totally dominate the ionization rate.
Document ID
19870057191
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Junkkarinen, Vesa T.
(California Univ. La Jolla, CA, United States)
Burbidge, E. Margaret
(California Univ. La Jolla, CA, United States)
Smith, Harding E.
(California, University La Jolla, United States)
Date Acquired
August 13, 2013
Publication Date
June 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 317
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A44465
Funding Number(s)
CONTRACT_GRANT: NSF AST-79-22032
CONTRACT_GRANT: NAS5-29293
CONTRACT_GRANT: NSG-7377
CONTRACT_GRANT: NSF AST-83-02378
Distribution Limits
Public
Copyright
Other

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