2007ApJ...670.1000H

Query : 2007ApJ...670.1000H

2007ApJ...670.1000H - Astrophys. J., 670, 1000-1009 (2007/December-1)

The XMM cluster survey: the dynamical state of XMMXCS J2215.9-1738 at z = 1.457.

HILTON M., COLLINS C.A., STANFORD S.A., LIDMAN C., DAWSON K.S., DAVIDSON M., KAY S.T., LIDDLE A.R., MANN R.G., MILLER C.J., NICHOL R.C., ROMER A.K., SABIRLI K., VIANA P.T.P. and WEST M.J.

Abstract (from CDS):

We present new spectroscopic observations of the most distant X-ray-selected galaxy cluster currently known, XMMXCS J2215.9-1738 at z=1.457, obtained with the DEIMOS instrument at the W. M. Keck Observatory and the FORS2 instrument on the ESO Very Large Telescope. Within the cluster virial radius, as estimated from the cluster X-ray properties, we increase the number of known spectroscopic cluster members to 17 objects, and calculate the line-of-sight velocity dispersion of the cluster to be 580±140 km/s. We find mild evidence that the velocity distribution of galaxies within the virial radius deviates from a single Gaussian. We show that the properties of J2215.9-1738 are inconsistent with self-similar evolution of local X-ray scaling relations, finding that the cluster is underluminous given its X-ray temperature, and that the intracluster medium contains ∼2-3 times the kinetic energy per unit mass of the cluster galaxies. These results can perhaps be explained if the cluster is observed in the aftermath of an off-axis merger. Alternatively, heating of the intracluster medium through supernovae and/or active galactic nucleus activity, as is required to explain the observed slope of the local X-ray luminosity-temperature relation, may be responsible.

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Journal keyword(s): galaxies: clusters: individual (XMMXCS J2215.9-1738) - X-Rays: Galaxies: Clusters

Nomenclature: Table 2: [HCS2007] NN (Nos 1-27).

Simbad objects: 36

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Number of rows : 36
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 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 517 0
2 ClG J0152-1358 ClG 01 52 41.3 -13 58 13           ~ 262 3
3 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 368 0
4 ClG J0848+4456 ClG 08 48 46.9 +44 56 22           ~ 62 1
5 ClG J0910+5422 ClG 09 10 44.9 +54 22 09           ~ 94 0
6 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 228 0
7 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 158 0
8 [HCS2007] 23 GiC 22 15 51.664 -17 37 11.96         24.07 ~ 2 0
9 [HCS2007] 22 GiC 22 15 52.483 -17 37 46.16         22.77 ~ 2 0
10 [HCS2007] 24 GiC 22 15 54.921 -17 40 13.29         23.71 ~ 2 0
11 [HLS2010] 65 GiC 22 15 56.059 -17 37 49.90           ~ 2 0
12 [BMC2017] XMM2215 1006 GiC 22 15 56.196 -17 37 49.93         23.64 ~ 5 0
13 [HCS2007] 19 GiC 22 15 56.316 -17 37 37.95           ~ 1 0
14 [HCS2007] 11 GiC 22 15 57.192 -17 38 07.80         23.24 ~ 3 0
15 [HLS2010] 35 GiC 22 15 57.23 -17 37 53.2   25.15     23.78 ~ 14 0
16 [HCS2007] 9 GiC 22 15 57.432 -17 37 57.90           ~ 3 0
17 [HCS2007] 14 GiC 22 15 58.344 -17 37 37.30         24.11 ~ 4 0
18 [HCS2007] 6 GiC 22 15 58.380 -17 38 10.71           ~ 1 0
19 [BFT2010] 333.9937-17.6329 GiC 22 15 58.483 -17 37 58.59         23.24 ~ 6 0
20 [BFT2010] 333.9937-17.6362 GiC 22 15 58.499 -17 38 10.55         23.53 ~ 7 1
21 ClG J2215-1738 ClG 22 15 58.5 -17 38 03           ~ 106 0
22 [BMC2017] XMM2215 780 AGN 22 15 58.871 -17 38 09.87   23.95     22.75 ~ 5 0
23 [BFT2010] 333.9953-17.6332 GiC 22 15 58.880 -17 37 59.21         23.49 ~ 6 0
24 [BMC2017] XMM2215 864 GiC 22 15 59.047 -17 38 02.62         23.34 ~ 6 0
25 [HLS2010] 7 GiC 22 15 59.080 -17 38 02.40         22.72 ~ 2 0
26 [BMC2017] XMM2215 971 GiC 22 15 59.142 -17 37 54.27         24.36 ~ 4 0
27 [HCS2007] 18 GiC 22 15 59.472 -17 38 37.39         23.09 ~ 3 0
28 SSTU J221559.68-173758.9 GiC 22 15 59.72 -17 37 59.0           ~ 10 0
29 [BMC2017] XMM2215 912 GiC 22 15 59.884 -17 37 59.29           ~ 4 0
30 [BMC2017] XMM2215 999 GiC 22 16 00.667 -17 37 51.62         23.66 ~ 4 1
31 [HCS2007] 20 GiC 22 16 03.096 -17 38 08.05           ~ 1 0
32 [BMC2017] XMM2215 615 GiC 22 16 03.176 -17 38 29.67           ~ 3 0
33 [HCS2007] 27 GiC 22 16 04.156 -17 34 23.08         23.41 ~ 2 0
34 [HCS2007] 25 GiC 22 16 09.525 -17 38 26.23         23.81 ~ 2 0
35 [HCS2007] 26 GiC 22 16 10.303 -17 36 23.36         23.54 ~ 2 0
36 ClG J2235-2557 ClG 22 35 20.6 -25 57 42           ~ 151 0

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