Interpretation of the fain galaxy number counts in the K band

Details Interpretation of the fain galaxy number counts in the K band Interpretation of the fain galaxy number counts in the K band

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...444...15y&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 444, no. 1, p. 15-20

Astronomy and Astrophysics

Astronomy

28

Cosmology, Counting, Extremely High Frequencies, Galactic Evolution, Galaxies, Universe, Astronomical Models, Detection, Red Shift, Sky Surveys (Astronomy), Space Density

Scientific paper

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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