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Deep H-Band Galaxy Counts and Half-Light Radii from Hubble Space Telescope/NICMOS Parallel Observations

Yan, Lin and McCarthy, Patrick J. and Storrie-Lombardi, Lisa J. and Weymann, Ray J. (1998) Deep H-Band Galaxy Counts and Half-Light Radii from Hubble Space Telescope/NICMOS Parallel Observations. Astrophysical Journal, 503 (1). L19-L22. ISSN 0004-637X. doi:10.1086/311521.

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We present deep galaxy counts and half-light radii from F160W (λ_c=1.6 μm) images obtained with the Near-Infrared Camera and Multiobject Spectrograph on the Hubble Space Telescope. Nearly 9 arcmin^2 have been imaged with camera 3, with 3 σ depths ranging from H=24.3 to 25.5 in a 0."6 diameter aperture. The slope of the counts fainter than H = 20 is 0.31, and the integrated surface density to H ≤ 24.75 is 4×10^5 galaxies deg^(-2). The half-light radii of the galaxies decline steeply with apparent magnitude. At H = 24, we are limited by both the delivered FWHM and the detection threshold of the images.

Item Type:Article
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Yan, Lin0000-0003-1710-9339
Storrie-Lombardi, Lisa J.0000-0002-5987-5210
Additional Information:Copyright is not claimed for this article. Received 23 March 1998. Accepted 22 April 1998. Published 17 July 1998. We thank the staff of the Space Telescope Science Institute for their efforts in making this parallel program possible. In particular, we thank Peg Stanley and the staff of the PRESTO division, Bill Sparks, John Mackenty, and Daniella Calzetti of the NICMOS group, and Bob Williams and Duccio Macchetto of the director's office. We acknowledge useful discussions with D. Hogg, I. Smail, R. Thompson, and M. Rieke. B. McLeod and I. Smail are thanked for generously allowing the use of their software for the data reduction and scale length measurements. This research was supported, in part, by grants from the Space Telescope Science Institute, GO-7498.01-96A and P423101. This project made use of the NASA/IPAC Extragalactic Database, operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:cosmology: observations; galaxies: evolution; infrared: galaxies
Issue or Number:1
Record Number:CaltechAUTHORS:20170323-132939019
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Official Citation:Lin Yan et al 1998 ApJ 503 L19
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75358
Deposited By: Ruth Sustaita
Deposited On:23 Mar 2017 20:42
Last Modified:15 Nov 2021 16:32

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