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Title: Absorption-line spectrum of GC 1556 + 335 - ejected or intervening material

Two rich C IV absorption complexes in the radio-loud QSO GC 1556 + 335 are described. Column densities for seven of the redshift systems in these complexes are measured, and limits on the distances between the QSO and absorbing clouds are derived using ionization parameters estimated from matching photoionization models to the observations and a density estimated from an upper limit to the C II(asterisk) column density in the z = 1.65367 redshift system. These limits show that GC 1556 + 335 is not a typical member of the BALQSO class. Two alternative models are discussed in which the absorption complexes are caused by material either entrained into a radio jet from the QSO or contained in two clusters of galaxies along the line of sight. It is suggested that the emission associated with the complexes may be detectable, and that a study of the velocity field and geometry of such emission might be decisive in determining the mechanism responsible for the absorption. 40 references.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
6640901
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophys. J.; (United States); Journal Volume: 310
Research Org:
Steward Observatory, Tucson, AZ; Multiple Mirror Telescope Observatory, Tucson, AZ; Space Telescope Science Institute, Baltimore, MD; Mount Wilson and Las Campanas Observatories, Pasadena, CA
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; QUASARS; ABSORPTION SPECTRA; COSMIC RADIO SOURCES; GALAXY CLUSTERS; KINETIC ENERGY; MATHEMATICAL MODELS; PLASMA JETS; RED SHIFT; ENERGY; SPECTRA 640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar, Radio & X-Ray Sources