An IR-Selected Galaxy Cluster at Z=1.41

Journal Article · Thu Mar 09 04:00:00 EST 2006 · The Astrophysical Journal Letters, vol. 634, no. 2, December 1, 2005, pp. 129-133

OSTI ID:894337

Stanford, S A; Eisenhardt, P R; Brodwin, M; Gonzalez, A H; Stern, D; Jannuzi, B; Dey, A; Brown, M I; McKenzie, E; Elston, R

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 894337
• Report Number(s): UCRL-JRNL-220862
• Journal Information: The Astrophysical Journal Letters, vol. 634, no. 2, December 1, 2005, pp. 129-133, Journal Name: The Astrophysical Journal Letters, vol. 634, no. 2, December 1, 2005, pp. 129-133
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS
ENERGY SPECTRA
GALAXIES
GALAXY CLUSTERS
SPECTROSCOPY