One more sample supporting the cosmological evolution of flat-spectrum quasars

Details One more sample supporting the cosmological evolution of flat-spectrum quasars One more sample supporting the cosmological evolution of flat-spectrum quasars

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...131...81m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 131, no. 1, Feb. 1984, p. 81-86.

Astronomy and Astrophysics

Astrophysics

5

Cosmology, Evolution (Development), Extragalactic Radio Sources, Quasars, Constants, Radio Spectra, Red Shift

Scientific paper

A complete sample of quasars has been drawn from the NRAO-MPI 5 GHz surveys and the Parkes 2.7 GHz surveys. The area covered is 9.811 sr of the sky, the largest possible one. The luminosity-volume (V/Vm) test applied to this sample shows strong cosmological evolution for all quasars, both steep and flat-spectrum sources. There is no statistically significant difference, in the resulting values of , between these two types of objects. The conclusion does not depend on the world model used: the V/Vmax test leads to quasar evolution also in models with non-zero cosmological constant.

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