Discovery of Two Giant Gas Clouds at High Redshift?

Details Discovery of Two Giant Gas Clouds at High Redshift? Discovery of Two Giant Gas Clouds at High Redshift?

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.7908f&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #79.08; Bulletin of the American Astronomical Society, Vol. 24, p.1248

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Scientific paper

Two high redshift (z = 3.18 & z = 3.23) QSOs, separated by only eight arcminutes, were discovered as part of the Large Bright QSO Survey (LBQS). Two strong absorption systems (observed-frame equivalent widths > 20 Angstroms) are seen on each line of sight, and the absorption systems are at the same redshifts (z=2.4 & z=2.9) in both lines of sight, to within 200 km/s. The a posteriori probability of either of these redshift matches is less than 0.1 %. If both lines of sight are blocked by the same absorbers, they must both have a transverse size of ~ 5 Mpc (proper distance). Even if the absorbers were different galaxies in the same supercluster (and CDM does not predict any superclusters at this redshift), the probability of both lines of sight passing through an absorber is less than 1% unless the absorbing radius of each galaxy is > 50 kpc. We conclude that these absorbers are either a remarkable statistical fluke, or some unexpected denizen of the early universe.

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