Evidence for the class of the most luminous quasars. IV. Cosmological Malmquist bias and the Lambda term

Details Evidence for the class of the most luminous quasars. IV. Cosmological Malmquist bias and the Lambda term Evidence for the class of the most luminous quasars. IV. Cosmological Malmquist bias and the Lambda term

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...399..829t&link_type=abstract

Astronomy and Astrophysics, v.399, p.829-832 (2003)

Astronomy and Astrophysics

Astrophysics

4

Quasars: General, Cosmology: Observations

Scientific paper

We study if the evidence for the optically luminous subclass of radio quasars (Teerikorpi 2000, 2001), depends on the Friedmann model used, especially on the presence or not of a Lambda term. Previously this grouping, with distinct properties, was found at MV ~ -26.0 + 5log h (Omegam = 1, Omega Lambda = 0). The cosmological Malmquist bias approach shows that the member candidates, separated by an empty luminosity range from fainter quasars, as well or better appear in the currently favoured flat models with a non-zero Lambda . We briefly illustrate the effect of Lambda on the Malmquist bias, depending on the steeper volume derivative and longer luminosity distance in Lambda models.

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