Searching for high-redshift superclusters

Details Searching for high-redshift superclusters Searching for high-redshift superclusters

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103..154r&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, Feb. 1991, p. 154-159. Research supported by Corni

Astronomy and Astrophysics

Astronomy

10

Galactic Clusters, Quasars, Red Shift, Absorption Spectra, Astronomical Spectroscopy, Metallicity

Scientific paper

Studies of QSO absorption lines can be used to discover 'superclusters' of metal-line systems (thought to be associated with galaxies) at large redshift, analogous to the absorbers found in the field surrounding the southern pair Tol 1037/1038. The unique ability of QSO absorption lines to reveal modest columns of gas at high redshift allows a pencil-beam survey of interesting fields. By concentrating on QSOs with known, rich, metal-line absorption systems and searching catalogs for nearby QSOs lying behind the proposed clusters, a number of promising fields have been identified. Initial results from QSOs surrounding Q1303 + 308 support the BAL hypothesis for the absorption in this object. It is shown that further observations will be of substantial use in delineating the extent and overdensity of superclustering at redshifts z = 1-21.

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