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Title:
Interpretation of the faint galaxy number counts in the K band
Authors:
Yoshii, Yuzuru; Peterson, Bruce A.
Affiliation:
AA(University of Tokyo, Mitaka, Tokyo, Japan), AB(University of Tokyo, Mitaka, Tokyo, Japan)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 444, no. 1, p. 15-20 (ApJ Homepage)
Publication Date:
05/1995
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cosmology, Counting, Extremely High Frequencies, Galactic Evolution, Galaxies, Universe, Astronomical Models, Detection, Red Shift, Sky Surveys (Astronomy), Space Density
DOI:
10.1086/175579
Bibliographic Code:
1995ApJ...444...15Y

Abstract

Number counts of K(2.2 micrometers)-selected galaxies reaching to K = 23 mag are compared to model predictions which take into account the selection bias against high-redshift galaxies inherent in the methods used to detect faint galaxy images. Using a standard model for galaxy luminosity evolution with a constant comoving density of galaxies, we find that these number count data favor a flat, low-density Omega0 approximatly 0.2 universe with a nonzero cosmological constant. We argue that the agreement with the model predictions for a low-density universe considerably diminishes any need to introduce a hypothetical population to explain the excess galaxies found in deep blue surveys.

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