An IR-Selected Galaxy Cluster at Z=1.41

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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 {approx}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 ... continued below

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7 p. (0.4 MB)

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Stanford, S A; Eisenhardt, P R; Brodwin, M; Gonzalez, A H; Stern, D; Jannuzi, B et al. March 9, 2006.

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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 {approx}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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7 p. (0.4 MB)

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PDF-file: 7 pages; size: 0.4 Mbytes

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  • Journal Name: The Astrophysical Journal Letters, vol. 634, no. 2, December 1, 2005, pp. 129-133

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  • Report No.: UCRL-JRNL-220862
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 894337
  • Archival Resource Key: ark:/67531/metadc883910

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  • March 9, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • April 17, 2017, 1:05 p.m.

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Stanford, S A; Eisenhardt, P R; Brodwin, M; Gonzalez, A H; Stern, D; Jannuzi, B et al. An IR-Selected Galaxy Cluster at Z=1.41, article, March 9, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc883910/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.