The Astrophysical Journal Letters Preprint typeset using L ATEX style emulateapj v. 4/12/04 AN IR–SELECTED GALAXY CLUSTER AT Z = 1.41
نویسندگان
چکیده
We report the discovery of a galaxy cluster at z = 1.41. ISCS J143809+341419 was found in the Spitzer/IRAC Shallow Survey of the Boötes field in the NOAO Deep Wide-Field Survey carried out by IRAC. The cluster candidate was initially identified as a high density region of objects with photometric redshifts in the range 1.3 < z < 1.5. Optical spectroscopy of a limited number of objects in the region shows that 5 galaxies within a ∼120 arcsec diameter region lie at z = 1.41 ± 0.01. Most of these member galaxies have broad–band colors consistent with the expected spectral energy distribution of a passively–evolving elliptical galaxy formed at high redshift. The redshift of ISCS J143809+341419 is the highest currently known for a spectroscopically-confirmed cluster of galaxies. Subject headings: galaxies: clusters — galaxies: evolution — galaxies: formation
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