IDCS J1426.5+3508: DISCOVERY OF A MASSIVE, INFRARED-SELECTED GALAXY CLUSTER AT z = 1.75

Journal Article · Tue Jul 10 00:00:00 EDT 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/753/2/164· OSTI ID:22039350

Stanford, S A; Zeimann, Greg ^[1]; Brodwin, M ^[2]; Gonzalez, Anthony H; Mancone, C ^[3]; Stern, Daniel; Eisenhardt, P R ^[4]; Dey, Arjun ^[5]

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1. Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States)
2. Department of Physics and Astronomy, University of Missouri, Kansas City, MO 64110 (United States)
3. Department of Astronomy, University of Florida, Gainesville, FL 32611 (United States)
4. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)
5. NOAO, 950 North Cherry Avenue, Tucson, AZ 85719 (United States)

We report the discovery of an IR-selected massive galaxy cluster in the IRAC Deep Cluster Survey (IDCS). We present new data from the Hubble Space Telescope and the W. M. Keck Observatory that spectroscopically confirm IDCS J1426.5+3508 at z = 1.75. Moreover, the cluster is detected in archival Chandra data as an extended X-ray source, comprising 53 counts after the removal of point sources. We calculate an X-ray luminosity of L{sub 0.5-2keV} = (5.4 {+-} 1.2) Multiplication-Sign 10{sup 44} erg s{sup -1} within r = 60 arcsec ({approx}1 Mpc diameter), which implies M{sub 200,L{sub x}}= (5.3{+-}1.6) Multiplication-Sign 10{sup 14} M{sub Sun }. IDCS J1426.5+3508 appears to be an exceptionally massive cluster for its redshift.

• OSTI ID: 22039350
• Journal Information: Astrophysical Journal, Vol. 753, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
COSMIC X-RAY SOURCES
DISTANCE
GALAXIES
GALAXY CLUSTERS
GAMMA ASTRONOMY
LUMINOSITY
POINT SOURCES
RED SHIFT
SPACE
TELESCOPES
X RADIATION