Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.109..333z&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 109, no. 2, Feb. 1985, p. 333-344.
Astronomy and Astrophysics
Astronomy
Quasars, X Ray Astronomy, Confidence, Luminosity, Radio Spectra, Red Shift, Regression Analysis
Scientific paper
The revision of the limiting-volume test (V/Vmax) on the basis of consideration of both quasar density and luminosity evolution is discussed. The quasar luminosity-redshift relationship curve is obtained by statistics of the regression procedure with truncated data, from which the incompleteness-compensated factors for each source is given, and the density law is obtained by the revised V/Vmax test. The revised V/Vmax test is used to analyze optical and radio samples of 3CR and 4C including the 3CR X-ray sample. The results show that the space-density law of quasars is relative to the decleration parameter at the 90 percent confidence level. The results are presented in graphs and tables.
Liu Zhan-Wei
Zhang Qing-Hong
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