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Spectrophotometry of six broad absorption line QSOs
Junkkarinen, Vesa T.; Burbidge, E. Margaret; Smith, Harding E.
AA(California, University, La Jolla), AB(California, University, La Jolla), AC(California, University, La Jolla)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 317, June 1, 1987, p. 460-476. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Astronomical Photometry, Galactic Radiation, Line Spectra, Quasars, Spectrophotometry, Absorption Spectroscopy, Astronomical Catalogs, Continuous Spectra, Emission Spectra, Velocity Distribution
Bibliographic Code:


The authors present spectrophotometric observations of six broad absorption-line QSOs ("BALQSOs"). These six QSOs, UM 232, UM 275, UM 139, UM 141, Q 1246-057, and RS 23, were observed at a resolution of 10 Å. The emission lines and continua of these BALQSOs are compared to emission lines and continua of QSOs without BALs. Many of the continuum and emission line characteristics of the BALQSOs and QSOs without BALs are similar. However, a statistically significant difference is found in the emission-line intensity ratio for N V lambda1240/C IV lambda1549. The absorption troughs of these QSOs are studied using approximate profiles of optical depth versus velocity. The column densities found for C+3 are in the range 0.5×1016 to 2×1016cm-2. The physical conditions in the BAL region are considered using the observed estimates for the column densities as constraints.

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