Investigation of the spatial clustering of quasars using the two-point correlation function

Details Investigation of the spatial clustering of quasars using the two-point correlation function Investigation of the spatial clustering of quasars using the two-point correlation function

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...286l..19k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 286, no. 2, p. L19-L22

Astronomy and Astrophysics

Astronomy

12

Cluster Analysis, Correlation, Cosmology, Quasars, Red Shift, Spatial Distribution, Universe, Astronomical Catalogs, Populations, Sky Surveys (Astronomy)

Scientific paper

Testing a combined sample totalling nearly 2200 quasars (with redshifts 0.2 less than z less than 4.5) derived from published surveys, we obtain strong clustering in the quasar distribution at scales less than 20/h Mpc. The correlation function for the total sample can be expressed as a power law xi(r) = (r/ro)gamma with ro = 6.0 +/- 1.2/h Mpc and gamma = -1.8. The dominant contribution for the clustering signal comes from quasars at moderate redshifts, z in (1, 2). The indications for the evolution of the correlation function with redshift are found. The criterion estimating the suitability of a given survey for the analysis of clustering effects is proposed and discussed.

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