Does the association of quasars with galaxies depend on the morphological type of galaxy?
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1983
- DOI:
- 10.1086/161216
- Bibcode:
- 1983ApJ...271..507C
- Keywords:
-
- Galactic Structure;
- Quasars;
- Astronomical Catalogs;
- Cross Correlation;
- Elliptical Galaxies;
- Significance;
- Spiral Galaxies;
- Astrophysics