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Title:
Near-infrared observations of the Z about 2.3 IRAS source FSC 10214 + 4724
Authors:
Soifer, B. T.; Neugebauer, G.; Graham, J. R.; Matthews, K.; Mazzarella, J. M.; Lonsdale, C. J.; Rowan-Robinson, M.; Broadhurst, T.; Lawrence, A.; McMahon, R.
Affiliation:
AA(Palomar Observatory, Pasadena, CA), AB(Palomar Observatory, Pasadena, CA), AC(Palomar Observatory, Pasadena, CA), AD(Palomar Observatory, Pasadena, CA), AE(Palomar Observatory, Pasadena, CA), AF(California Institute of Technology, Pasadena), AG(Queen Mary and Westfield College, London, England), AH(Queen Mary and Westfield College, London, England), AI(Queen Mary and Westfield College, London, England), AJ(Cambridge University Institute of Astronomy, England)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 381, Nov. 10, 1991, p. L55-L57. Research supported by NASA. (ApJ Homepage)
Publication Date:
11/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
INFRARED SOURCES (ASTRONOMY), NEAR INFRARED RADIATION, CASSEGRAIN OPTICS, COSMIC DUST, INFRARED ASTRONOMY SATELLITE, QUASARS, RED SHIFT
DOI:
10.1086/186195
Bibliographic Code:
1991ApJ...381L..55S

Abstract

Near-infrared imaging and spectroscopy of the extremely luminous IRAS source FSC 10214 + 4724 have been obtained using the Cassegrain infrared camera on the 200-inch Hale Telescope. A low-resolution spectrum in the 2.0-2.4 micron atmospheric window shows a very strong H-alpha line at the optically determined redshift z = 2.286. The observed rest-frame equivalent width of H-alpha is 0.07 +/-0.02 microns, consistent with the largest values found in quasars. The images show an unresolved source, while the near-infrared colors are somewhat redder than the mean colors of quasars observed at the same redshift. The reddening inferred is about 1.5 mag, with an upper limit of about 3.0 mag. If FSC 10214 + 4724 is a quasar, the reddening-corrected bolometric luminosity is approximately equal to the observed infrared luminosity.

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