The spatial clustering of QSOs

Astronomy and Astrophysics – Astronomy

Scientific paper

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Quasars, Spatial Distribution, Correlation, Galactic Clusters, Red Shift

Scientific paper

The authors have used a new complete redshift survey of ≡170 QSOs to investigate QSO clustering. They have determined the QSO clustering correlation function ξqq over the range of separations 0 < r ≤ 1000h-1Mpc (comoving). At small scales (0 < r ≤ 10h-1Mpc) they have tentatively detected QSO clustering at a level stronger than that expected for galaxies on a simple "stable" model for galaxy clustering evolution. At larger scales (10 < r ≤ 1000h-1Mpc) the observed correlation function is close to zero, placing strong new constraints on the homogeneity of the Universe.

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