2012A&A...546A...6A

Query : 2012A&A...546A...6A

2012A&A...546A...6A - Astronomy and Astrophysics, volume 546A6-6 (2012/10-1)

The enrichment history of the intracluster medium: a Bayesian approach.

ANDREON S.

Abstract (from CDS):

This work measures the evolution of the iron content in galaxy clusters by a rigorous analysis of the data of 130 clusters at 0.1<z<1.3. This task is made difficult by a) the low signal-to-noise ratio of abundance measurements and the upper limits; b) possible selection effects; c) boundaries in the parameter space; d) non-Gaussian errors; e) the intrinsic variety of the objects studied; and f) abundance systematics. We introduce a Bayesian model to address all these issues at the same time, thus allowing cross-talk (covariance). On simulated data, the Bayesian fit recovers the input enrichment history, unlike in standard analysis. After accounting for a possible dependence on X-ray temperature, for metal abundance systematics, and for the intrinsic variety of studied objects, we found that the present-day metal content is not reached either at high or at low redshifts, but gradually over time: iron abundance increases by a factor 1.5 in the 7Gyr sampled by the data. Therefore, feedback in metal abundance does not end at high redshift. Evolution is established with a moderate amount of evidence, 19 to 1 odds against faster or slower metal enrichment histories. We quantify, for the first time, the intrinsic spread in metal abundance, 18±3%, after correcting for the effect of evolution, X-ray temperature, and metal abundance systematics. Finally, we also present an analytic approximation of the X-ray temperature and metal abundance likelihood functions, which are useful for other regression fitting involving these parameters. The data for the 130 clusters and code used for the stochastic computation are provided with the paper.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: intracluster medium - X-rays: diffuse background - methods: statistical

VizieR on-line data: <Available at CDS (J/A+A/546/A6): table1.dat>

Simbad objects: 131

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Number of rows : 131
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 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 648 1
3 BAX 006.9575+26.2739 ClG 00 27 45.90 +26 16 25.0           ~ 44 0
4 ClG J0030+2618 ClG 00 30 33.6 +26 18 16           ~ 65 0
5 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 195 0
6 ACO 115 ClG 00 55 59 +26 23.2           ~ 295 1
7 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 326 0
8 [HXX2004] SW Clump X 01 52 39.7 -13 58 30           ~ 5 1
9 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 241 0
10 [HXX2004] NE Clump X 01 52 44.1 -13 57 22           ~ 6 1
11 ACT-CL J0159.8-0849 ClG 01 59 49.4 -08 50 00           ~ 98 0
12 ClG J0216-1747 ClG 02 16 32.8 -17 47 11           ~ 16 0
13 ACT-CL J0232.2-4421 ClG 02 32 18.69 -44 20 41.5           ~ 130 0
14 ClG J0242-2132 ClG 02 42 35.9 -21 32 26           ~ 55 0
15 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 389 0
16 ACO 402 ClG 02 57 41.33 -22 09 14.4           ~ 62 0
17 ClG 0302+17 ClG 03 05 19.0 +17 28 38     21.00     ~ 58 0
18 ClG J0318-0302 ClG 03 18 16.61 -03 01 59.4           ~ 27 0
19 RX J0329.6-0211 ClG 03 29 41.6 -02 11 47           ~ 155 0
20 ClG J0337-2522 ClG 03 37 44.9 -25 22 39           ~ 22 0
21 ACT-CL J0404.6+1108 ClG 04 04 37.4 +11 09 57           ~ 36 0
22 ClG J0429-0253 ClG 04 29 36.0 -02 53 09           ~ 131 0
23 ACT-CL J0438.9+0716 ClG 04 39 00.7 +07 15 45           ~ 62 0
24 BAX 069.7593+05.3453 ClG 04 39 02.2 +05 20 43           ~ 82 0
25 ClG J0451+0006 ClG 04 51 54.6 +00 06 19           ~ 57 0
26 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
27 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
28 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 368 0
29 ACO S 506 ClG 05 01 04.4 -24 24 41           ~ 60 0
30 BAX 076.3329-28.8181 ClG 05 05 19.9 -28 49 05           ~ 16 0
31 ClG J0522-3624 ClG 05 22 13.8 -36 24 49           ~ 41 0
32 ClG J0542-4100 ClG 05 42 49.9 -40 59 58           ~ 67 0
33 ClG J0647+7015 ClG 06 47 50.0 +70 14 55           ~ 177 0
34 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
35 ClG J0717+3745 ClG 07 17 36.50 +37 45 23.0           ~ 511 0
36 B3 0714+378 Rad 07 17 36.6 +37 45 01           ~ 170 2
37 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 196 0
38 ClG J0744+3927 ClG 07 44 52.5 +39 27 30           ~ 189 0
39 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
40 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 277 0
41 ClG J0847+3449 ClG 08 47 11.3 +34 49 16           ~ 27 0
42 ClG J0848+4456 ClG 08 48 46.9 +44 56 22           ~ 62 1
43 ZwCl 0847+3617 ClG 08 50 12.0 +36 03 36           ~ 75 0
44 ClG J0853+5759 ClG 08 53 13.4 +57 59 44           ~ 27 0
45 ClG 0906.5+1110 ClG 09 09 12.7 +10 58 32           ~ 108 0
46 ClG J0910+5422 ClG 09 10 44.9 +54 22 09           ~ 94 0
47 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 308 0
48 ACO 781 ClG 09 20 25.4 +30 30 07           ~ 167 0
49 ClG J0926+1242 ClG 09 26 36.6 +12 42 59           ~ 43 0
50 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
51 ClG J0947+7623 ClG 09 46 59.916 +76 23 43.99           ~ 165 0
52 NVSS J094712+762312 Rad 09 47 12.37 +76 23 09.3           ~ 151 1
53 ZwCl 0947+1723 ClG 09 49 51.8 +17 07 05           ~ 92 0
54 ClG J0956+4107 ClG 09 56 03.4 +41 07 14           ~ 44 0
55 ACO 907 ClG 09 58 21.84 -11 03 47.5           ~ 137 0
56 ClG J1008+5342 ClG 10 08.7 +53 42           ~ 6 0
57 ZwCl 1006+1201 ClG 10 08 47.1 +11 47 55     18.0     ~ 75 0
58 ClG 1008-12 ClG 10 10 34.1 -12 39 48     18.0     ~ 155 0
59 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
60 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 458 0
61 ClG J1113-2615 ClG 11 13 05.7 -26 15 36           ~ 37 0
62 ACO 1204 ClG 11 13 32.2 +17 35 40           ~ 101 0
63 ClG J1117+1744 ClG 11 17 30.2 +17 44 44           ~ 35 0
64 ClG J1120+4318 ClG 11 20 07.6 +43 18 07           ~ 65 0
65 ClG J1120+2326 ClG 11 20 57.9 +23 26 41           ~ 42 0
66 ACO 1240 ClG 11 23 37.7 +43 03 28           ~ 113 0
67 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 168 0
68 ClG 1137+66 ClG 11 40 23.0 +66 08 16     21.0     ~ 141 0
69 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 546 0
70 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 456 0
71 ClG J1205+4429 GrG 12 05 52.3 +44 29 22           ~ 24 0
72 ClG 1208+39 ClG 12 11 16.0 +39 11 41     19.8     ~ 38 0
73 ClG J1213+0253 ClG 12 13 34.4 +02 53 57           ~ 34 0
74 ClG J1221+4918 ClG 12 21 25.0 +49 18 07           ~ 60 0
75 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 228 0
76 ZwCl 1231+1007 ClG 12 34 21.9 +09 47 02           ~ 72 0
77 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 158 0
78 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 149 1
79 ClG J1311-0311 ClG 13 11 01.7 -03 10 38           ~ 120 0
80 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
81 ClG J1317+2911 ClG 13 17 21.70 +29 11 18.1           ~ 33 0
82 ACO 1722 ClG 13 20 08.3 +70 04 33           ~ 63 0
83 ClG 1322+3027 ClG 13 24 48.2 +30 11 34           ~ 68 0
84 ZwCl 1332+5043 ClG 13 34 20.0 +50 30 54           ~ 42 0
85 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 335 0
86 BAX 205.7046+40.4697 ClG 13 42 49.1 +40 28 11           ~ 22 0
87 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
88 ClG J1350+6007 ClG 13 50 48.55 +60 07 06.7           ~ 46 0
89 ClG J1354-0221 ClG 13 54 17.00 -02 22 13.1           ~ 52 0
90 ClG J1415+3611 ClG 14 15 11.1 +36 12 03           ~ 85 1
91 [VMF98] 158 ClG 14 16 28.1 +44 46 38           ~ 50 0
92 ClG J1423+2404 ClG 14 23 47.7 +24 04 40           ~ 231 0
93 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
94 ACO 1942 ClG 14 38 21.8673 +03 40 13.247           ~ 122 0
95 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
96 ClG J1504-0248 ClG 15 04 07.4 -02 48 15           ~ 186 0
97 ACO 2034 ClG 15 10 03.9 +33 30 57           ~ 248 1
98 ClG J1517+3127 ClG 15 17 55.9 +31 27 35           ~ 12 0
99 ACO 2069 ClG 15 24 02.92 +29 53 20.3           ~ 165 0
100 ClG J1524+0957 ClG 15 24 40.3 +09 57 35           ~ 64 0
101 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7 17.819 ~ 155 1
102 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 188 0
103 ACO 2125 ClG 15 41 14.1 +66 15 57           ~ 124 1
104 ClG 1603+4313 ClG 16 04 23.7 +43 04 52           ~ 134 1
105 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
106 ClG J1621+3810 ClG 16 21 25.5 +38 09 43           ~ 83 0
107 ClG 1621+26 ClG 16 23 35.7 +26 33 50           ~ 145 0
108 ACO 2204 ClG 16 32 47.7 +05 34 18           ~ 457 0
109 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
110 ClG J1641+4001 ClG 16 41 52.3 +40 01 29           ~ 43 0
111 ClG J1701+6414 ClG 17 01 22.6 +64 14 09           ~ 78 0
112 ClG J1716+6708 ClG 17 16 49.6 +67 08 30           ~ 137 0
113 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 131 0
114 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 284 0
115 ClG J1720+3536 ClG 17 20 16.8 +35 36 27           ~ 150 1
116 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 370 0
117 ACO 2294 ClG 17 24 10.1 +85 53 09           ~ 69 0
118 MCS J1824.3+4309 ClG 18 24 19.0 +43 09 49           ~ 19 0
119 ClG J1931-2635 ClG 19 31 49.6 -26 34 33           ~ 181 0
120 ACT-CL J2011.4-5724 ClG 20 11 26.8 -57 25 09           ~ 48 0
121 ClG 2053-04 ClG 20 56 21.2 -04 37 46   21.0       ~ 168 0
122 ClG J2129-0741 ClG 21 29 26.0 -07 41 28           ~ 189 0
123 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 308 0
124 ACO 2409 ClG 22 00 52.7 +20 58 27           ~ 101 0
125 BAX 337.1433+20.6131 ClG 22 28 32.6 +20 37 08           ~ 132 0
126 ClG J2229-2756 ClG 22 29 45.36 -27 55 36.5           ~ 50 0
127 MCS J2245.0+2637 ClG 22 45 04.5 +26 38 07           ~ 40 0
128 BAX 341.8712+03.6203 ClG 22 47 29.5 +03 37 08           ~ 27 1
129 ACO S 1063 ClG 22 48 45.4 -44 31 42           ~ 395 0
130 ClG J2302+0844 ClG 23 02 48.1 +08 43 50           ~ 43 0
131 ACO 2631 ClG 23 37 40.7 +00 16 35           ~ 183 0

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