Very Large-Scale Structure Using QSO Absorption Line Systems

Details Very Large-Scale Structure Using QSO Absorption Line Systems Very Large-Scale Structure Using QSO Absorption Line Systems

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...18911606v&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #116.06; Bulletin of the American Astronomical Society, Vol. 28, p.1428

Astronomy and Astrophysics

Astronomy

Scientific paper

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 (q_0=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 q_0=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 q_0, and hence Omega_0 . We present maps of the absorber distribution on very large scales (several Gpc), identify several high--redshift supercluster candidates, and discuss preliminary results on the power spectrum P(k).

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