The angular correlation function between QSOs and Abell clusters

Details The angular correlation function between QSOs and Abell clusters The angular correlation function between QSOs and Abell clusters

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997cha%26a..21..138z&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 21, Issue 2, p. 138-145.

Astronomy and Astrophysics

Astrophysics

Scientific paper

Using the new version of the Hewlett-Burbidge Catalogue and the all-sky catalogue of Abell clusters (ACO 1989) we analysed the cross-correlation function between them. We found anti-correlation at angular separations θ > 3°, and that is mainly caused by the optically-selected rather than the radio-selected QSOs. This fact can probably be explained by extinction by intracluster dust. However, there is no anti-correlation at θ < 3°. This suggests that there is also a tendency of physical association between them. Further analysis shows the correlation to be independent of the redshift of the QSOs, and this independence is unfavorable to the gravitational lensing interpretation.

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