Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983acasn..24...97z&link_type=abstract
(Acta Astronomica Sinica, vol. 24, no. 1-3, 1983, p. 97-105) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 7, Dec. 1
Astronomy and Astrophysics
Astrophysics
Cross Correlation, Galaxies, Position (Location), Quasars, Spatial Distribution, Astronomical Catalogs, Magnitude, Red Shift, Statistical Analysis
Scientific paper
Some new quasar data and the method of correlation function are used to analyze the question of association between QSOs and galaxies. All the galaxies in the Uppsala Catalog and 785 QSOs in the new Hewitt and Burbidge Catalog are used. The two-point cross-correlation function is applied, and it is found that there is an average excess of 0.153 + or - 0.011 galaxies within 10.0 arcmin of any given QSO, supporting an association between QSOs and galaxies. A comparison between the observed standard deviation and the expected one, based on the angular correlation function of the Uppsala galaxies, also supports the association. The QSO-galaxy association appears to be more striking for QSOs of larger redshifts or fainter magnitudes. A nearest-neighbor test provides evidence for QSO-galaxy association with a degree of confidence greater than 99.5 percent.
Chu Yao-Quan
Zhu Xin-Fen
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