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29 March 2024
 
  » arxiv » astro-ph/9803066

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Keck Spectroscopy of Giant Arcs in Abell 2390
B. L. Frye ; T. J. Broadhurst ; H. Spinrad ; A. Bunker ;
Date 6 Mar 1998
Subject astro-ph
AbstractWe present new Keck observations of giant arcs in the cluster Abell 2390. High resolution two-dimensional spectra of two arcs show metal lines at z=4.040 +/- 0.005 with Lyman-alpha emission spatially separated from the stellar continuum. In addition, spectroscopy along the notorious `straight’ arc reveals two unrelated galaxies, at z=0.913 and z=1.033, with absorption lines of MgII and FeII at z=0.913 seen against the more distant object, indicating the presence of a large gaseous halo.
Source arXiv, astro-ph/9803066
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