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Date and Time of the Query: 2019-04-23 T01:50:42 PDT
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For refcode 1991ApJ...380..334M:
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1991ApJ...380..334M SPECTROSCOPY OF THE GRAVITATIONAL ARCS IN Cl 2244-02, A370 (ARCLET A5), AND Cl 0024+1654 YANNICK MELLIER, BERNARD FORT, GENEVIEVE SOUCAIL, GUY MATHEZ, and MIREILLE CAILLOUX Observatoire Midi-Pyrenees, 14 Avenue E. Belin, F-31400 Toulouse, France Received 1991 January 18; accepted 1991 April 29 ABSTRACT We analyze new spectroscopic data on the blue giant arc in Cl 2244 - 02, on the arclet A5 in Abell 370, and on the split arc in Cl 0024+1654. A probable redshift z = 2.237 is derived for the source of the Cl 2244-02 arc, making this object one of the most distant "field" galaxies known today. A star formation rate is estimated from the Ly{alpha} intensity and compared to other distant field galaxies. For A5, no prominent emission line is found, but three absorption lines point to a tentative redshift z = 1.306. The spectra of the four parts of the Cl 0024+1654 arc look rather similar, but the absence of any spectral feature allows only the determination of a redshift range: 1 <z <2.1. The systematic search for such arcs and/or arclets, and the Toulouse spectroscopic survey of arcs which follows up, seems one of the promising methods of obtaining spectra of extremely distant field galaxies and of constraining their early evolution. Subject headings: galaxies: clustering - galaxies: redshifts - gravitational lenses
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