Search for correlations of Lyman-alpha clouds and metal systems on closely spaced lines of sight

R. M. Elowitz, Richard F. Green, Christopher D Impey

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Spectra of four quasars projected within 2°.8 on the sky with emission redshifts near 1.9 were analyzed for correlations of metal-line and Lyα absorbers. The group of bright quasars LB 9601, LB 9605, LB 9612, and LB 9615 probes scales on the sky of clusters and superclusters of galaxies. No significant correlation signal was detected in any of the three pairs of sight lines tested out to a velocity separation of 10,000 km s-1. One common pair of Lyα absorbers was newly detected, with velocities identical to within 10 km s-1. Four new heavy-element absorption systems are reported. Three C IV systems, one along each of three of the lines of sight, agree in velocity to within 4% of the accessible velocity range, which may indicate that the absorbers are associated. No evidence is found that intervening hydrogen clouds are correlated on the scale of superclusters of galaxies.

Original languageEnglish (US)
Pages (from-to)458-465
Number of pages8
JournalAstrophysical Journal
Volume440
Issue number2
StatePublished - Feb 20 1995

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line of sight
absorbers
metal
metals
quasars
sky
hydrogen clouds
galaxies
heavy elements
probe
hydrogen
probes

Keywords

  • Quasars: absorption lines

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Search for correlations of Lyman-alpha clouds and metal systems on closely spaced lines of sight. / Elowitz, R. M.; Green, Richard F.; Impey, Christopher D.

In: Astrophysical Journal, Vol. 440, No. 2, 20.02.1995, p. 458-465.

Research output: Contribution to journalArticle

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