Constraints on the universe with a decaying cosmological constant from a number count of faint galaxies

Details Constraints on the universe with a decaying cosmological constant from a number count of faint galaxies Constraints on the universe with a decaying cosmological constant from a number count of faint galaxies

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387l...7y&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 387, March 1, 1992, p. L7-L11.

Mathematics

Logic

19

Cosmology, Faint Objects, Galaxies, Universe, Astronomical Photometry, Dark Matter, Red Shift, Relic Radiation

Scientific paper

Cosmological parameters of a spatially flat universe with a decaying cosmological constant Lambda that is proposed by Peebles and Ratra are constrained from recent observations of number count of faint galaxies in the blue and near-infrared passbands. Possible combinations of density parameter Omega(0) and the index alpha which controls the decaying rate of Lambda are determined. It is found that the number count data indicate Omega(0) = 0.3-0.5 for a possible range of alpha, and that the high-density Omega(0) = 1 universe with zero space curvature is strongly disfavored by these data.

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