2010ApJ...725.1252D

Query : 2010ApJ...725.1252D

2010ApJ...725.1252D - Astrophys. J., 725, 1252-1276 (2010/December-2)

Star formation histories in a cluster environment at z ∼ 0.84.

DEMARCO R., GOBAT R., ROSATI P., LIDMAN C., RETTURA A., NONINO M., VAN DER WEL A., JEE M.J., BLAKESLEE J.P., FORD H.C. and POSTMAN M.

Abstract (from CDS):

We present a spectrophotometric analysis of galaxies belonging to the dynamically young, massive cluster RX J0152.7-1357 at z ∼ 0.84, aimed at understanding the effects of the cluster environment on the star formation history (SFH) of cluster galaxies and the assembly of the red sequence (RS). We use VLT/FORS spectroscopy, ACS/WFC optical, and NTT/SofI near-IR data to characterize SFHs as a function of color, luminosity, morphology, stellar mass, and local environment from a sample of 134 spectroscopic members. In order to increase the signal-to-noise ratio, individual galaxy spectra are stacked according to these properties. Moreover, the D4000, Balmer, CN3883, Fe4383, and C4668 indices are also quantified. The SFH analysis shows that galaxies in the blue faint-end of the RS have on average younger stars (Δt ∼ 2 Gyr) than those in the red bright-end. We also found, for a given luminosity range, differences in age (Δt ∼ 0.5-1.3 Gyr) as a function of color, indicating that the intrinsic scatter of the RS may be due to age variations. Passive galaxies in the blue faint-end of the RS are preferentially located in the low density areas of the cluster, likely being objects entering the RS from the "blue cloud." It is likely that the quenching of the star formation of these RS galaxies is due to interaction with the intracluster medium. Furthermore, the SFH of galaxies in the RS as a function of stellar mass reveals signatures of "downsizing" in the overall cluster.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: RX J0152.7-1357 - galaxies: evolution - galaxies: formation

VizieR on-line data: <Available at CDS (J/ApJ/725/1252): table1.dat>

Nomenclature: Table 1: [DRL2005] NNNNa N=32 among (Nos 18-5063) added.

Simbad objects: 136

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Number of rows : 136
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 [DCL2021] Cl0152.7-1357 a EmG 01 52 30.42 -13 57 14.1           ~ 4 0
2 [DRL2005] 3013 EmG 01 52 30.91 -13 57 43.5           ~ 3 0
3 [TKA2006] F1-36 EmG 01 52 31.28 -13 56 46.2     25.50 24.41   ~ 2 0
4 [DRL2005] 1514 GiC 01 52 32.49 -14 00 29.4           ~ 2 0
5 [DRL2005] 5010 EmG 01 52 34.2 -13 56 18           ~ 1 0
6 [TKA2006] F1-31 EmG 01 52 34.38 -13 56 18.3     24.07 23.56   ~ 2 0
7 [DRL2005] 1496 GiC 01 52 34.49 -13 58 41.8           ~ 5 0
8 [DRL2005] 161 EmG 01 52 34.82 -13 59 46.9           ~ 3 0
9 [DRL2005] 735 EmG 01 52 34.9 -13 57 10           ~ 1 0
10 [DRL2005] 184 EmG 01 52 35.03 -13 59 42.0           ~ 3 0
11 [DRL2005] 805 GiC 01 52 35.14 -13 57 36.5           ~ 2 0
12 [DRL2005] 396 GiC 01 52 35.16 -13 58 39.9           ~ 2 0
13 [DRL2005] 144 EmG 01 52 35.19 -13 59 47.8           ~ 3 0
14 [DRL2005] 1112 EmG 01 52 35.7 -13 55 45           ~ 1 0
15 [DRL2005] 291 GiC 01 52 35.75 -13 59 10.9           ~ 2 0
16 [DRL2005] 511 GiC 01 52 35.75 -13 58 07.5           ~ 2 0
17 [DRL2005] 1367 GiC 01 52 35.97 -13 56 30.1           ~ 2 0
18 [DRL2005] 1226 GiC 01 52 36.01 -13 56 03.2           ~ 2 0
19 [DRL2005] 1239 GiC 01 52 36.10 -13 56 05.7           ~ 3 0
20 [DRL2005] 551 EmG 01 52 36.17 -13 57 47.5           ~ 6 0
21 [DRL2005] 682 GiC 01 52 36.3 -13 56 52           ~ 1 0
22 [DRL2005] 436 G 01 52 36.81 -13 58 27.2     24.89 23.68   ~ 2 0
23 [DRL2005] 67 EmG 01 52 37.06 -14 00 08.6           ~ 2 0
24 [DRL2005] 650 EmG 01 52 37.33 -13 56 33.4           ~ 4 0
25 [DRL2005] 394 EmG 01 52 37.35 -13 58 33.0           ~ 3 0
26 [DRL2005] 1172 GiC 01 52 37.42 -13 55 47.2           ~ 2 0
27 [DRL2005] 859 GiC 01 52 37.54 -13 54 26.2           ~ 2 0
28 [DRL2005] 1131 EmG 01 52 37.55 -13 55 38.1           ~ 3 0
29 [DCL2021] Cl0152.7-1357 c EmG 01 52 37.88 -13 56 09.1           ~ 4 0
30 [DRL2005] 344 GiC 01 52 37.99 -13 58 54.8           ~ 2 0
31 [DRL2005] 1258 EmG 01 52 38.02 -13 56 25.8           ~ 3 0
32 [DCL2021] Cl0152.7-1357 d EmG 01 52 38.22 -13 55 38.6           ~ 4 0
33 [DRL2005] 1338 GiC 01 52 38.48 -13 56 31.1           ~ 2 0
34 [DRL2005] 347 EmG 01 52 38.61 -13 58 54.6           ~ 3 0
35 [DRL2005] 241 GiC 01 52 38.65 -13 59 20.7           ~ 5 0
36 [DRL2005] 418 GiC 01 52 38.88 -13 58 31.2           ~ 2 0
37 [DRL2005] 295 EmG 01 52 39.38 -13 59 04.2           ~ 3 0
38 [DRL2005] 509 GiC 01 52 39.41 -13 58 06.0           ~ 3 0
39 [DRL2005] 498 GiC 01 52 39.47 -13 58 07.8           ~ 2 0
40 [DRL2005] 1146 EmG 01 52 39.64 -13 55 45.9           ~ 4 0
41 [DRL2005] 332 GiC 01 52 39.65 -13 58 56.1           ~ 5 0
42 [EJP2000] F GiC 01 52 39.67 -13 58 25.8           ~ 4 0
43 [TKA2006] F1-23 EmG 01 52 39.68 -13 56 29.8     24.37 23.69   ~ 2 0
44 [DRL2005] 270 EmG 01 52 39.72 -13 59 14.2           ~ 3 0
45 [DRL2005] 557 AGN 01 52 39.78 -13 57 40.1           ~ 3 0
46 [DRL2005] 474 GiC 01 52 39.8 -13 58 17           ~ 1 0
47 [DRL2005] 1067 G 01 52 39.8 -13 55 20           ~ 1 0
48 [EJP2000] E GiC 01 52 39.82 -13 58 23.8           ~ 5 0
49 [DRL2005] 234 EmG 01 52 39.87 -13 59 17.2           ~ 3 0
50 [DRL2005] 267 EmG 01 52 39.91 -13 59 18.9           ~ 3 0
51 [DRL2005] 598 GiC 01 52 39.93 -13 57 41.3           ~ 2 0
52 [DRL2005] 327 EmG 01 52 40.20 -13 58 58.6           ~ 3 0
53 [DRL2005] 513 GiC 01 52 40.25 -13 58 04.4           ~ 2 0
54 [DRL2005] 455 GiC 01 52 40.34 -13 58 22.4           ~ 4 0
55 [DRL2005] 477 GiC 01 52 40.41 -13 58 11.7           ~ 2 0
56 [DRL2005] 397 GiC 01 52 40.45 -13 58 37.7           ~ 2 0
57 [DRL2005] 1246 G 01 52 40.51 -13 56 09.3           ~ 3 0
58 [DRL2005] 468 GiC 01 52 40.64 -13 58 14.4           ~ 3 0
59 [DRL2005] 895 GiC 01 52 40.89 -13 54 31.8           ~ 3 0
60 [DRL2005] 1132 G 01 52 41.1 -13 55 40           ~ 1 0
61 [DRL2005] 113 GiC 01 52 41.17 -13 59 56.8           ~ 2 0
62 [DRL2005] 377 EmG 01 52 41.19 -13 58 42.5           ~ 3 0
63 ClG J0152-1358 ClG 01 52 41.3 -13 58 13           ~ 262 3
64 [DRL2005] 18 EmG 01 52 41.55 -14 00 26.1           ~ 3 0
65 [DRL2005] 898 EmG 01 52 41.60 -13 54 30.5           ~ 3 0
66 [DRL2005] 889 GiC 01 52 41.67 -13 54 29.1           ~ 2 0
67 [DRL2005] 1006 EmG 01 52 41.76 -13 55 03.9           ~ 3 0
68 [DRL2005] 547 GiC 01 52 41.78 -13 57 57.2           ~ 2 0
69 [DRL2005] 491 GiC 01 52 41.82 -13 58 12.9           ~ 4 0
70 [DRL2005] 129 GiC 01 52 41.86 -13 59 51.4           ~ 2 0
71 [DRL2005] 85 GiC 01 52 41.89 -13 59 53.9           ~ 2 0
72 [DRL2005] 1204 G 01 52 42.3 -13 56 01           ~ 1 0
73 [DRL2005] 571 GiC 01 52 42.38 -13 57 49.6           ~ 4 0
74 [DCL2021] Cl0152.7-1357 e GiC 01 52 42.51 -13 56 19.6           ~ 7 0
75 [DRL2005] 182 EmG 01 52 42.8 -13 59 38           ~ 1 0
76 [DCL2021] Cl0152.7-1357 f GiC 01 52 42.82 -13 57 53.7           ~ 6 0
77 [DRL2005] 1454 GiC 01 52 42.91 -13 57 25.2           ~ 2 0
78 [DRL2005] 1442 GiC 01 52 42.92 -13 57 33.6           ~ 6 0
79 [DRL2005] 97 GiC 01 52 43.08 -14 00 01.6           ~ 2 0
80 [DRL2005] 445 GiC 01 52 43.09 -13 58 21.8           ~ 2 0
81 [DRL2005] 5049 EmG 01 52 43.1 -13 54 29           ~ 1 0
82 [DRL2005] 1465 GiC 01 52 43.30 -13 57 25.3           ~ 2 0
83 [DRL2005] 626 GiC 01 52 43.32 -13 55 41.9           ~ 2 0
84 [DRL2005] 928 G 01 52 43.5 -13 54 42           ~ 1 0
85 [DRL2005] 688 GiC 01 52 43.53 -13 56 54.7           ~ 2 0
86 [DRL2005] 1151 GiC 01 52 43.55 -13 55 51.2           ~ 2 0
87 [DRL2005] 177 GiC 01 52 43.56 -13 59 38.6           ~ 2 0
88 [DRL2005] 35 EmG 01 52 43.6 -14 00 21           ~ 1 0
89 [DRL2005] 5034 G 01 52 43.6 -13 58 39           ~ 1 0
90 [DRL2005] 1225 GiC 01 52 43.61 -13 56 01.5           ~ 2 0
91 [OOP2020] CL J0152.7-1357 BCG BiC 01 52 43.7842 -13 57 18.558           ~ 4 0
92 [DRL2005] 5042 EmG 01 52 43.79 -14 00 33.9     24.97 23.78   ~ 2 0
93 [EJP2000] C GiC 01 52 43.79 -13 57 18.4           ~ 4 0
94 [VV2006] J015243.8-135900 QSO 01 52 43.8050644248 -13 59 01.290771780   20.96   20.84   ~ 10 0
95 [DRL2005] 595 GiC 01 52 44.07 -13 57 46.0           ~ 2 0
96 [DRL2005] 1532 EmG 01 52 44.14 -14 00 38.6           ~ 3 0
97 [TKA2006] F3-11 G 01 52 44.30 -14 00 06.2     24.83 23.56   ~ 2 0
98 [DRL2005] 1102 G 01 52 44.4 -13 55 27           ~ 1 0
99 [DRL2005] 1184 GiC 01 52 44.47 -13 55 52.0           ~ 2 0
100 [DRL2005] 663 GiC 01 52 44.79 -13 56 37.1           ~ 2 0
101 [DRL2005] 648 GiC 01 52 44.91 -13 56 34.1           ~ 2 0
102 [DRL2005] 701 GiC 01 52 44.94 -13 57 02.7           ~ 4 0
103 [DRL2005] 145 EmG 01 52 45.1 -13 59 52           ~ 1 0
104 [DRL2005] 1356 GiC 01 52 45.3 -13 56 37           ~ 1 0
105 [DRL2005] 47 EmG 01 52 45.54 -14 00 15.3           ~ 3 0
106 [DRL2005] 654 GiC 01 52 45.57 -13 56 38.3           ~ 4 0
107 [DRL2005] 1386 GiC 01 52 45.68 -13 56 43.9           ~ 4 0
108 [DRL2005] 679 GiC 01 52 45.79 -13 56 57.7           ~ 2 0
109 [DRL2005] 1383 EmG 01 52 46.8 -13 56 50           ~ 1 0
110 [DRL2005] 868 EmG 01 52 46.81 -13 54 29.1           ~ 3 0
111 [DRL2005] 5063 G 01 52 46.9 -13 54 09           ~ 1 0
112 [DRL2005] 328 G 01 52 47.0 -13 59 01           ~ 1 0
113 [DRL2005] 204 EmG 01 52 47.32 -13 59 26.1           ~ 3 0
114 [DRL2005] 1483 G 01 52 47.4 -13 57 18           ~ 1 0
115 [DRL2005] 5027 EmG 01 52 47.7 -14 00 47           ~ 1 0
116 [DRL2005] 1099 GiC 01 52 47.91 -13 55 29.4           ~ 2 0
117 [DRL2005] 26b EmG 01 52 48.29 -14 00 24.0           ~ 3 0
118 [DRL2005] 248 EmG 01 52 48.33 -13 59 21.6           ~ 3 0
119 [DRL2005] 522 EmG 01 52 49.1 -13 58 03           ~ 1 0
120 [DRL2005] 258 GiC 01 52 49.41 -13 58 31.2           ~ 2 0
121 [DRL2005] 5015 GiC 01 52 49.6 -13 58 39           ~ 1 0
122 [DRL2005] 306 EmG 01 52 49.66 -13 58 28.0           ~ 4 0
123 [DRL2005] 811 EmG 01 52 50.2 -13 57 40           ~ 1 0
124 [DRL2005] 931 GiC 01 52 50.43 -13 57 11.6     24.68 23.53   ~ 3 0
125 [DRL2005] 1499 GiC 01 52 50.88 -13 57 30.1     24.54 23.51   ~ 3 0
126 [DRL2005] 543 GiC 01 52 50.91 -13 57 52.9           ~ 2 0
127 [DRL2005] 1530 EmG 01 52 50.99 -14 00 20.7           ~ 3 0
128 [DRL2005] 1500 GiC 01 52 51.05 -13 57 27.5           ~ 2 0
129 [DRL2005] 131 GiC 01 52 51.91 -13 58 16.4           ~ 2 0
130 [DRL2005] 1501 GiC 01 52 51.92 -13 58 15.3           ~ 2 0
131 [DRL2005] 1290 EmG 01 52 52.72 -13 56 22.7           ~ 3 0
132 [DRL2005] 432 GiC 01 52 52.75 -13 58 23.8           ~ 2 0
133 [DRL2005] 125 EmG 01 52 52.93 -13 59 53.1           ~ 3 0
134 [TKA2006] F2- 8 EmG 01 52 54.05 -13 58 48.2     22.91 22.24   ~ 2 0
135 [DRL2005] 3015 GiC 01 52 55.71 -13 56 49.5           ~ 2 0
136 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 458 0

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