Optical and near IR galaxy number counts in the GOYA survey. The ages of Ellipticals

Abstract

Based on the GOYA Photometric Survey of the HST Groth-Westphal strip, we present galaxy number counts in B and Ks bands together with a model that simultaneously reproduces the counts and that does not need to add an extra population of blue dwarf galaxies to reproduce the blue excess of the counts at faint magnitudes.