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An IR-Selected Galaxy Cluster at z = 1.41

S. A. Stanford·Peter R. Eisenhardt·Mark Brodwin·Anthony H. Gonzalez·Daniel Stern·Buell Jannuzi·Arjun Dey·Michael J. I. Brown·Eric McKenzie·Richard Elston
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Abstract

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 Bootes 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.

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S. A. Stanford, Peter R. Eisenhardt, Mark Brodwin, Anthony H. Gonzalez, Daniel Stern, Buell Jannuzi, Arjun Dey, Michael J. I. Brown, Eric McKenzie, Richard Elston. 2005-10-22. An IR-Selected Galaxy Cluster at z = 1.41. https://doi.org/10.1086/499045

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