Associated C IV absorption in radio-loud QSOs - The '3C mini-survey'

Details Associated C IV absorption in radio-loud QSOs - The '3C mini-survey' Associated C IV absorption in radio-loud QSOs - The '3C mini-survey'

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94..278a&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 94, Aug. 1987, p. 278-288.

Astronomy and Astrophysics

Astronomy

73

Absorption Spectra, Astronomical Spectroscopy, Carbon, Quasars, Radio Sources (Astronomy), Emission Spectra, Line Spectra, Red Shift

Scientific paper

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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