Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...325..651t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 325, Feb. 15, 1988, p. 651-670.
Astronomy and Astrophysics
Astrophysics
88
Absorption Spectra, Astronomical Spectroscopy, Line Spectra, Quasars, High Resolution, Lyman Alpha Radiation, Spectral Resolution, Spectrum Analysis
Scientific paper
The first moderately high resolution observations of three broad absorption line (BAL) QSOs with PHL 5200-type profiles are presented. Relatively smooth absorption extends from the emission blueward out to wavelengths corresponding to as much as several tens of thousands of km/s. There is some structure in the absorption troughs of all the objects which may be due to the effects of radiation pressure. The Ly-alpha broad emission line region (BELR) is occulted by the QSO and must also be larger in extent along the line of sight than the Ly-alpha emitting region. The evidence for occultation of the regions creating the high-ionization BELs of C IV, Si IV, and N V by the BALR is discussed. It is concluded that the BALR occults all of the components of the BEL region in 1413 + 113. Limits on the BALR covering factor are discussed, and is is concluded that the BALR occults the N V BELR that the BAL flow is decelerating.
Foltz Craig B.
Grillmair Carl J.
Turnshek David A.
Weymann Ray J.
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