2011ApJ...732...33B

Query : 2011ApJ...732...33B

2011ApJ...732...33B - Astrophys. J., 732, 33 (2011/May-1)

X-ray emission from two infrared-selected galaxy clusters at z > 1.4 in the IRAC shallow cluster survey.

BRODWIN M., STERN D., VIKHLININ A., STANFORD S.A., GONZALEZ A.H., EISENHARDT P.R., ASHBY M.L.N., BAUTZ M., DEY A., FORMAN W.R., GETTINGS D., HICKOX R.C., JANNUZI B.T., JONES C., MANCONE C., MILLER E.D., MOUSTAKAS L.A., RUEL J., SNYDER G. and ZEIMANN G.

Abstract (from CDS):

We report the X-ray detection of two z > 1.4 infrared-selected galaxy clusters from the IRAC Shallow Cluster Survey (ISCS). We present new data from the Hubble Space Telescope and the W. M. Keck Observatory that spectroscopically confirm cluster ISCS J1432.4+3250 at z = 1.49, the most distant of 18 confirmed z > 1 clusters in the ISCS to date. We also present new spectroscopy for ISCS J1438.1+3414, previously reported at z = 1.41, and measure its dynamical mass. Clusters ISCS J1432.4+3250 and ISCS J1438.1+3414 are detected in 36 ks and 143 ks Chandra exposures at significances of 5.2σ and 9.7σ, from which we measure total masses of log(M200,Lx/M☉_) = 14.4±0.2 and 14.35 +0.14_- 0.11_, respectively. The consistency of the X-ray and dynamical properties of these high-redshift clusters further demonstrates that the ISCS is robustly detecting massive clusters to at least z = 1.5.

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Journal keyword(s): galaxies: clusters: individual (ISCS J1432.4+3250, ISCS J1438.1+3414) - galaxies: distances and redshifts - galaxies: evolution

Nomenclature: Table 1: [BSV2011] JHHMMSS.s+DDMMSS N=17+8.

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACT-CL J0546.6-5345 ClG 05 46 37.6557 -53 45 33.242           ~ 98 0
2 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
3 NAME NOAO Deep Wide Field reg 14 32 05.75 +34 16 47.5           ~ 430 0
4 [BSV2011] J143221.9+324939 G 14 32 21.96 +32 49 39.5           ~ 1 0
5 [BSV2011] J143222.6+325221 G 14 32 22.60 +32 52 21.6           ~ 1 0
6 [BSV2011] J143223.6+325032 G 14 32 23.69 +32 50 32.7           ~ 1 0
7 ISCS J1432.4+3250 ClG 14 32 24.2 +32 49 55           ~ 14 0
8 [BSV2011] J143224.4+324933 G 14 32 24.48 +32 49 33.6           ~ 1 0
9 [BSV2011] J143225.3+325121 G 14 32 25.38 +32 51 21.9           ~ 1 0
10 [BSV2011] J143225.5+325042 G 14 32 25.59 +32 50 42.3           ~ 1 0
11 [BSV2011] J143225.6+325043 G 14 32 25.60 +32 50 43.3           ~ 1 0
12 [BSV2011] J143232.2+324950 G 14 32 32.27 +32 49 50.2           ~ 2 0
13 [BSV2011] J143803.7+341328 G 14 38 03.72 +34 13 28.2           ~ 2 0
14 [SEB2005] IRAC J143806+341433 G 14 38 06.97 +34 14 33.8           ~ 2 0
15 [BSV2011] J143807.2+341446 G 14 38 07.26 +34 14 46.3           ~ 2 0
16 [SEB2005] IRAC J143807+341441 G 14 38 07.80 +34 14 41.6           ~ 2 0
17 [BSV2011] J143807.9+341330 G 14 38 07.90 +34 13 30.7           ~ 2 0
18 [BSV2011] J143808.1+341453 G 14 38 08.18 +34 14 53.6           ~ 4 0
19 [BSV2011] J143808.3+341415 G 14 38 08.30 +34 14 15.1           ~ 2 0
20 [BSV2011] J143808.3+341417 G 14 38 08.36 +34 14 17.8           ~ 2 0
21 ISCS J143809+341419 ClG 14 38 08.71 +34 14 19.2           ~ 35 0
22 [BSV2011] J143809.8+341345 G 14 38 09.83 +34 13 45.0           ~ 2 0
23 [BSV2011] J143810.0+341421 G 14 38 10.08 +34 14 21.8           ~ 1 0
24 [BSV2011] J143810.6+341247 G 14 38 10.64 +34 12 47.3           ~ 2 0
25 [SEB2005] IRAC J143811+341256 G 14 38 11.24 +34 12 56.2           ~ 2 0
26 [SEB2005] IRAC J143812+341318 G 14 38 12.09 +34 13 18.2           ~ 2 0
27 [SEB2005] IRAC J143813+341452 G 14 38 13.36 +34 14 52.9           ~ 2 0
28 [BSV2011] J143815.7+341659 G 14 38 15.79 +34 16 59.4           ~ 2 0
29 [BSV2011] J143816.4+341625 G 14 38 16.41 +34 16 25.7           ~ 2 0
30 [BSV2011] J143816.8+341440 AGN 14 38 16.84 +34 14 40.4           ~ 3 0
31 ClG J2215-1738 ClG 22 15 58.5 -17 38 03           ~ 106 0

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