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Title:
Associated C IV absorption in radio-loud QSOs - The '3C mini-survey'
Authors:
Anderson, Scott F.; Weymann, Ray J.; Foltz, Craig B.; Chaffee, Frederic H., Jr.
Affiliation:
AA(Mount Wilson and Las Campanas Observatoires, Pasadena, CA), AB(Mount Wilson and Las Campanas Observatoires, Pasadena, CA), AC(Multiple Mirror Telescope Observatory, Tucson, AZ), AD(Multiple Mirror Telescope Observatory, Tucson, AZ)
Publication:
Astronomical Journal (ISSN 0004-6256), vol. 94, Aug. 1987, p. 278-288. (AJ Homepage)
Publication Date:
08/1987
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Absorption Spectra, Astronomical Spectroscopy, Carbon, Quasars, Radio Sources (Astronomy), Emission Spectra, Line Spectra, Red Shift
DOI:
10.1086/114468
Bibliographic Code:
1987AJ.....94..278A

Abstract

A spectroscopic survey at 1 Å resolution of twelve 3C and 3CR QSOs reveals a very high incidence of C IV absorption complexes within ±5000 km/s of the C IV λλ1548, 1550 emission-line redshift. Such "associated" C IV absorption is found to be "strong" (rest-frame equivalent width ≥1.5 Å) in six of these powerful, steep-spectrum radio sources, while four others show weaker associated absorption. Such strong associated C IV complexes with zabs ≈ zem are comparatively rare in a sample of radio-quiet QSOs investigated previously. The evidence for possible correlations with various radio properties is briefly discussed, although no correlations are thus far confirmed to be statistically significant.

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