Cosmological constraint revisited from K band galactic counts.

Details Cosmological constraint revisited from K band galactic counts. Cosmological constraint revisited from K band galactic counts.

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998cotph..30..275x&link_type=abstract

Commun. Theor. Phys., Vol. 30, No. 2, p. 275 - 280

Mathematics

Logic

Cosmology: Galaxy Counts, Cosmology: Cosmic Density Parameter

Scientific paper

The information of ΩΛ of a flat universe is extracted from K band galaxy number counts, without using evolution (NE) models. Cowie et al.'s observations, with model input luminosity functions taken from Efstathiou et al. (1988), Loveday et al. (1992) and Mobasher et al. (1993), give >ΩΛ< in the range: 0.59 ≡ 0.81 plus a typical random error of σΩΛ = 0.2 - 0.1, respectively. Keck's observations give ΩΛ = 0.9. The authors conclude that either the normalization of nearby luminosity function is too high or the cosmological constant cannot be too large.

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