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Near-infrared imaging of FSC 10214+4724 with the W. M. Keck Telescope
Matthews, K.; Soifer, B. T.; Nelson, J.; Boesgaard, H.; Graham, J. R.; Harrison, W.; Irace, W.; Jernigan, G.; Larkin, J. E.; Lewis, H.; Lin, S.; Neugebauer, G.; Sirota, M.; Smith, G.; Ziomkowski, C.
AA(California Inst. of Technology, Pasadena, CA, US), AB(California Inst. of Technology, Pasadena, CA, US), AC(University of California, Berkeley, CA, US), AD(University of California, Berkeley, CA, US), AE(California Inst. of Technology, Pasadena, CA, US), AF(California Inst. of Technology, Pasadena, CA, US), AG(California Association for Research in Astronomy, Kamuela, HI, US), AH(California Association for Research in Astronomy, Kamuela, HI, US), AI(California Inst. of Technology, Pasadena, CA, US), AJ(California Inst. of Technology, Pasadena, CA, US)
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 420, no. 1, p. L13-L16 (ApJL Homepage)
Publication Date:
NASA/STI Keywords:
Galactic Clusters, H Alpha Line, Infrared Astronomy, Interacting Galaxies, Luminosity, Starburst Galaxies, Infrared Astronomy Satellite, Infrared Imagery, Nitrogen, Red Shift, Reflecting Telescopes
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Near-infrared observations of the z = 2.286 IRAS source FSC 10214+4724, made with the near-infrared camera on the W. M. Keck Telescope, are reported. Deep broad-band images at 2.15 and 1.27 micrometers, and narrow-band images at 2.165 and 2.125 micrometers with 0.6 sec to 0.9 sec seeing show that FSC 10214+4724 consists of at least three distinct components in a compact group of galaxies. The source of the infrared luminosity appears to be in a strongly interacting galaxy that has a luminosity of approximately 100 times that of a present-day L* galaxy. The interaction suggests and 'age' of this galaxy of approximately equal to 109 yr. The H-alpha emission is resolved as a source of diameter approximately equal to 5 kpc, suggesting that a starburst contributes to the observed H-alpha emission. There is an excess of objects in the FSC 10214+4724 field that could represent galaxies in an associated cluster.

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