Clustering of quasars

Details Clustering of quasars Clustering of quasars

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...218l..33s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 218, Dec. 1, 1977, p. L33-L35.

Astronomy and Astrophysics

Astrophysics

30

Galactic Clusters, Luminous Intensity, Quasars, Spatial Distribution, Elliptical Galaxies, Galaxies, Radio Spectra, Red Shift, Seyfert Galaxies, Space Density, Spectroscopic Analysis

Scientific paper

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.

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