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arXiv · astro-ph/9910478

Three-micron imaging of the Hubble Deep Field

David W. Hogg·Gerry Neugebauer·Judith G. Cohen·Mark Dickinson·S. G. Djorgovski·Keith Matthews·B. T. Soifer
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Abstract

Images of the Hubble Deep Field at 3.2 um, taken with the 10-m Keck Telescope, are presented. The images cover a total area of ~2.5 arcmin^2. To a 5-sigma limit of [3.2](total)=17.5 mag (Vega-relative), 11 sources are detected, 9 of which are extragalactic. The integrated galaxy number counts are therefore ~1.3x10^4 deg^{-2} to this depth. The galaxies detected at 3.2 um have a median redshift of z=0.56. All 3.2 um sources have 1.6 um, 1.1 um and visual counterparts, all of fairly regular morphologies; several also have 6.7 um, 15 um, 850 um, 8.5 GHz, or 1.4 GHz counterparts. No sources are found which are either anomalously red or anomalously blue in their H-[3.2] color, and there are significant detections of most of the known near-infrared HDF sources for which detection in these 3.2 um data seemed likely.

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David W. Hogg, Gerry Neugebauer, Judith G. Cohen, Mark Dickinson, S. G. Djorgovski, Keith Matthews, B. T. Soifer. 2000-01-05. Three-micron imaging of the Hubble Deep Field. https://doi.org/10.1086/301309

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