1997/01/31 by Jean M. Quashnock, J. M. Quashnock, D. E. Vanden Berk +6
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9702013
Latex, 3 pages. To appear in the Proceedings of the 18th Texas Symposium on Relativistic Astrophysics, eds. A. Olinto, J. Frieman and D. Schramm, (World Scientific, Singapore, 1997)
arxiv created 1997/01/31 · openalex publication_date 1997/01/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study clustering on very large scales -- from several tens to hundreds of comoving Mpc -- using an extensive catalog of heavy-element QSO absorption-line systems. We find significant evidence that C IV absorbers are clustered on comoving scales of 100 h-1 Mpc (q0=0.5) and less. The superclustering is present even at high redshift (z∼ 3); furthermore, it does not appear that the superclustering scale (comoving) has changed significantly since then. Our estimate of that scale increases to 240 h-1 Mpc if q0=0.1, which is larger than the largest scales of clustering seen at the present epoch. This may be indicative of a larger value of q0, and hence Ω0. We identify 7 high-redshift supercluster candidates, with 2 at redshift z∼ 2.8. The evolution of the correlation function on 50 h-1 Mpc scales is consistent with that expected in cosmologies with Ω0= ranging from 0.1 to 1. Finally, we find no evidence for clustering on scales greater than 100 h-1 Mpc (q0=0.5) or 240 h-1 Mpc (q0=0.1).