2005ApJ...624..124U

Query : 2005ApJ...624..124U

2005ApJ...624..124U - Astrophys. J., 624, 124-134 (2005/May-1)

Cl 1205+44: a fossil group at z = 0.59.

ULMER M.P., ADAMI C., COVONE G., DURRET F., LIMA NETO G.B., SABIRLI K., HOLDEN B., KRON R.G. and ROMER A.K.

Abstract (from CDS):

This is a report of Chandra, XMM-Newton, Hubble Space Telescope, and Astrophysical Research Consortium telescope observations of an extended X-ray source at z=0.59. The apparent member galaxies range from spiral to elliptical, and are all relatively red (i'-Ksabout 3). We interpret this object to be a fossil group based on the difference between the brightness of the first and second brightest cluster members in the i' band, and because the rest-frame bolometric X-ray luminosity is about 9.2x1043h–270 ergs/s. This makes Cl 1205+44 the highest redshift fossil group yet reported. The system also contains a central double-lobed radio galaxy that appears to be growing via the accretion of smaller galaxies. We discuss the formation and evolution of fossil groups in light of the high redshift of Cl 1205+44.

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Journal keyword(s): Galaxies: Clusters: Individual: Alphanumeric: Cl 1205+44 (read: ClG J1205+4429) - X-Rays: Individual: Alphanumeric: Cl 1205+44 (read: RX J1205.8+4429)

Nomenclature: Table 1: [UAC2005] N (Nos 1-8).

CDS comments: Cl 1205+44 = ClG J1205+4429, Fig. 7 : RX J1340.6 and RX J1416.4 are respectively RX J1340.6+4018 and RX J1416.4+2315, Fig. 10 and par. 1.3 : FIRST 1205 +44 = FIRST J120551.6+442911 + FIRST J120550.8+442908

Simbad objects: 17

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Number of rows : 17
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 ACO 194 ClG 01 26 01.3 -01 22 02           ~ 363 2
2 NGC 1550 BiC 04 19 37.9450450152 +02 24 35.918168940   14.0       ~ 183 1
3 BAX 064.9080+02.4099 GrG 04 19 38.2 +02 25 12           ~ 44 1
4 ClG J0848+4456 ClG 08 48 46.9 +44 56 22           ~ 62 1
5 [JML2007] J120550.30+442918.6 GiG 12 05 50.40 +44 29 18.6       22.35   ~ 2 0
6 FIRST J120550.8+442908 Rad 12 05 50.840 +44 29 08.12           ~ 1 1
7 [UAC2005] 7 GiG 12 05 51.390 +44 29 09.86       20.64   ~ 4 1
8 [UAC2005] 8 GiG 12 05 51.60 +44 28 52.3           ~ 1 0
9 NVSS J120551+442910 Rad 12 05 51.660 +44 29 11.10           ~ 3 2
10 [UAC2005] 3 GiG 12 05 51.84 +44 29 32.3           ~ 1 0
11 ClG J1205+4429 GrG 12 05 52.3 +44 29 22           ~ 24 0
12 [UAC2005] 6 GiG 12 05 52.56 +44 29 14.3           ~ 1 0
13 [JML2007] J120552.69+442918.8 GiG 12 05 52.80 +44 29 18.6       22.55   ~ 2 0
14 [UAC2005] 2 GiG 12 05 53.28 +44 29 37.7           ~ 1 0
15 [UAC2005] 1 GiC 12 05 53.76 +44 29 45.6           ~ 1 0
16 BAX 205.1392+40.2967 ClG 13 40 33.4 +40 17 48           ~ 45 1
17 BAX 214.1083+23.2564 GrG 14 16 27.70 +23 15 25.9           ~ 65 0

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