Clustering of quasars.
Abstract
No evidence is found for significant pairing of quasars in a sample of 175 UV-excess objects of which perhaps about 80% are quasars. The space densities of quasars and giant elliptical galaxies brighter than an absolute visual magnitude of -23 are compared, and it is predicted that clustering of quasars should become important somewhere between V magnitudes of 20 and 23. The possible association of steep-spectrum, flat-spectrum, and radio-quiet quasars with giant elliptical galaxies is considered on the basis of observational data. It is concluded that the subset of steep-spectrum quasars is related to giant ellipticals.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1977
- DOI:
- 10.1086/182570
- Bibcode:
- 1977ApJ...218L..33S
- Keywords:
-
- Galactic Clusters;
- Luminous Intensity;
- Quasars;
- Spatial Distribution;
- Elliptical Galaxies;
- Galaxies;
- Radio Spectra;
- Red Shift;
- Seyfert Galaxies;
- Space Density;
- Spectroscopic Analysis;
- Astrophysics