Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347...52h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. 52-58.
Astronomy and Astrophysics
Astronomy
45
Absorption Spectra, Galactic Clusters, Interstellar Extinction, Quasars, Carbon, Coronas, Halos, Red Shift, Sky Surveys (Astronomy), Spatial Distribution
Scientific paper
The clustering of C IV absorption line systems along the lines of sight to the 55 quasars in the survey of Sargent, Boksenberg, and Steidel is examined. Their original result that there is strong clustering of these systems at separations less than 1000 km/s is confirmed. The peculiar velocities of the clouds that combine with the one-dimensional nature of the sampling is shown to preclude any detailed comparison of the observed clustering strength on these scales with that found for nearby systems such as galaxies. The sample also contains significant clustering on larger scales, 1000-10,000 km/s. This probably reflects true spatial clustering of an amplitude exceeding that observed for any nearby systems, even rich clusters of galaxies. The signal is due mainly to high equivalent width absorbers and is dominated by a single very large 'absorption supercluster' in the quasar 0237-233. It seems likely that this structure was produced by processes other than gravitational instability.
Heisler Julia
Hogan Craig J.
White Simon D. M.
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