Clustering of Identical Quasars in the SDSS First Data Release

Details Clustering of Identical Quasars in the SDSS First Data Release Clustering of Identical Quasars in the SDSS First Data Release

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..311..467t&link_type=abstract

AGN Physics with the Sloan Digital Sky Survey, Proceedings of a conference held in Princeton, NJ, USA, 27-31 July 2003, Edited b

Physics

Scientific paper

We discuss sets of ``identical'' clustered quasars from the Sloan Digital Sky Survey First Data Release at comoving separations up to 200 h-1Mpc (in a cosmology with ΩM = 0.3 and ΩΛ = 0.7). The components of each set have nearly identical redshifts, colors, and spectra. While most of the comparisons were two-point, several identical triplets were also identified. Statistical analyses show that the amount of spectral similarity in quasars pairs within 110 h-1Mpc exceeds the expected similarity from a randomly distributed set of quasars. The high degree of exhibited spectral similarity is unlikely to be due to gravitational lensing at such wide separations.

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