Observations of QSOs in the direction of clusters of galaxies.
Abstract
A search for QSOs in the direction of 66 Abell clusters of galaxies has yielded eight objects with redshifts ranging from 0.09 to 2.06. Statistical arguments suggest that the ratio of bright QSOs to bright galaxies in clusters of galaxies is not more than 10 times that ratio in the field. The number of QSOs found is larger than expected from field surveys, but the apparent excess may be caused by systematic error in our magnitudes. Subject headings: galaxies, clusters of - quasi-stellar sources or objects - redshifts
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1973
- DOI:
- 10.1086/152266
- Bibcode:
- 1973ApJ...183..777B