The V/V(max) test for QSOs - Comments on the paper by Hawkins and Stewart

Details The V/V(max) test for QSOs - Comments on the paper by Hawkins and Stewart The V/V(max) test for QSOs - Comments on the paper by Hawkins and Stewart

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...270...48w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 270, July 1, 1983, p. 48-50.

Astronomy and Astrophysics

Astrophysics

2

Cosmology, Quasars, Space Density, Evolution (Development), Red Shift

Scientific paper

Hawkins and Stewart's interpretation of the results of the V/V(max) test for QSO samples is shown to be invalid. Their suggestion that the high values of V/V(max) at small redshifts result from the exclusion of nearby QSOs from the samples is examined quantitatively for the well-studied 3CR sample, and shown to have a negligible effect on the results. Their claim that the values of V/V(max) at larger redshifts indicate a uniform space density of QSOs is not true after an error in their calculations is corrected. Although the V/V(max) test is less sensitive to space density evolution at large redshifts, current results are in good agreement with the hypothesis that a single density evolution law describes the observations out to a redshift of at least 2.5.

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