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A Deep Multicolor Survey. VI. Near-Infrared Observations, Selection Effects, and Number Counts

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/48167

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Title: A Deep Multicolor Survey. VI. Near-Infrared Observations, Selection Effects, and Number Counts
Creators: Martini, Paul
Keywords: cosmology: observations
galaxies: evolution
galaxies: formation
galaxies: photometry
Issue Date: 2001-02
Publisher: American Astronomical Society
Citation: Paul Martini, "A Deep Multicolor Survey. VI. Near-Infrared Observations, Selection Effects, and Number Counts," The Astronomical Journal 121, no. 2 (2001), doi:10.1086/318757
DOI: 10.1086/318757
Abstract: I present near-infrared J (1.25 μm), H (1.65 μm), and K (2.2 μm) imaging observations of 185 arcmin^2 in 21 high galactic latitude fields. These observations reach limiting magnitudes of J ~ 21, H ~ 20, and K ~ 18.5 mag. The detection efficiency, photometric accuracy, and selection biases as a function of integrated object brightness, size, and profile shape are quantified in detail. I evaluate several popular methods for measuring the integrated light of faint galaxies and show that only aperture magnitudes provide an unbiased measure of the integrated light that is independent of apparent magnitude. These J, H, and K counts and near-infrared colors are in best agreement with passive galaxy formation models with at most a small amount of merging (for Ω_M = 0.3 and Ω_Λ = 0.7).
ISSN: 1538-3881
URI: http://hdl.handle.net/1811/48167
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