Mathematics – Logic
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...271..507c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 271, Aug. 15, 1983, p. 507-511.
Mathematics
Logic
3
Galactic Structure, Quasars, Astronomical Catalogs, Cross Correlation, Elliptical Galaxies, Significance, Spiral Galaxies
Scientific paper
The association between quasars and galaxies of different morphological type is examined by applying the cross-correlation function techniques used by Seldner and Pebbles (1979) to a complete catalogue of galaxies. The two-point cross-correlation function technique is first presented and used to analyze all types of galaxies in the Uppsala catalogue. Galaxies are then divided into three broad classifications - sprial, lenticular, and elliptical - and the statistical significance of associations with quasars for these morphological types is examined. The study convincingly indicates a high statistical significance for the sample, with on the average 0.153 + or -0.011 more galaxies within 10.0 arcmin of a quasar than would be expected if the quasars were randomly located. No significant differences are found among the three morphological types of galaxies studied.
Chu Yan-Yi
Zhu Xiyu
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