2009MNRAS.398..133L

Query : 2009MNRAS.398..133L

2009MNRAS.398..133L - Mon. Not. R. Astron. Soc., 398, 133-156 (2009/September-1)

Stellar populations in the centres of brightest cluster galaxies.

LOUBSER S.I., SANCHEZ-BLAZQUEZ P., SANSOM A.E. and SOECHTING I.K.

Abstract (from CDS):

This paper is part of a series devoted to the study of the stellar populations in brightest cluster galaxies (BCGs), aimed at setting constraints on the formation and evolution of these objects. We have obtained high signal-to-noise ratio, long-slit spectra of 49 BCGs in the nearby Universe. Here, we derive single stellar population (SSP)-equivalent ages, metallicities and α-abundance ratios in the centres of the galaxies using the Lick system of absorption line indices. We systematically compare the indices and derived parameters for the BCGs with those of large samples of ordinary elliptical galaxies in the same mass range. We find no significant differences between the index-velocity dispersion relations of the BCG data and those of normal ellipticals, but we do find subtle differences between the derived SSP parameters. The BCGs show, on average, higher metallicity ([Z/H]) and α-abundance ([E/Fe]) values. We analyse possible correlations between the derived parameters and the internal properties of the galaxies (velocity dispersion, rotation, luminosity) and those of the host clusters (density, mass, distance from BCG to X-ray peak, presence of cooling flows), with the aim of dissentangling if the BCG properties are more influenced by their internal or host cluster properties. The SSP parameters show very little dependence on the mass or luminosity of the galaxies, or the mass or density of the host clusters. Of this sample, 26 per cent show luminosity-weighted ages younger than 6 Gyr, probably a consequence of recent - if small - episodes of star formation. In agreement with previous studies, the BCGs with intermediate ages tend to be found in cooling-flow clusters with large X-ray excess.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: formation - galaxies: stellar content

VizieR on-line data: <Available at CDS (J/MNRAS/398/133): tabled1.dat tabled2.dat>

Simbad objects: 100

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Number of rows : 100
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 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
2 Z 384-34 BiC 00 56 16.101 -01 15 19.77   14.40 14.45     ~ 82 1
3 MCG-04-03-044 rG 01 02 41.43 -21 52 41.8   14.54 15.1 12.94   ~ 77 3
4 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 391 1
5 LEDA 4072 G 01 08 50.8 -15 24 29   14.75       ~ 9 0
6 ACO 151 ClG 01 08 52.3 -15 25 01           ~ 199 1
7 ACO 2877 ClG 01 09 49.3 -45 54 02           ~ 160 2
8 IC 1633 rG 01 09 55.5490585560 -45 55 52.102562844   12.23       ~ 93 3
9 ACO 189 ClG 01 23 40.4 +01 38 38           ~ 103 1
10 NGC 533 rG 01 25 31.4074984248 +01 45 33.236656812   13.1 14.11     ~ 237 1
11 NGC 541 AGN 01 25 44.3069825040 -01 22 46.086331044 13.42 13.03 12.08     ~ 219 2
12 NAME Minkowski's Object GiC 01 25 47.4 -01 22 21   16       ~ 81 1
13 ACO 194 ClG 01 26 01.3 -01 22 02           ~ 363 2
14 ACO 376 ClG 02 45 48 +36 51.6           B8.5 161 1
15 MCG+06-07-004 BiC 02 46 03.9460542576 +36 54 18.840411612   15.50       ~ 46 1
16 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
17 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
18 MCG-06-10-002 rG 04 13 58.7325830136 -38 05 50.064366876   15.19   13.40   ~ 33 0
19 RXC J0413.9-3805 ClG 04 13 58.8 -38 05 53           ~ 24 0
20 MCG-02-12-039 rG 04 33 37.8465077496 -13 15 42.989961204   13.95 14.22     ~ 104 2
21 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
22 ACO S 479 ClG 04 37 45 -51 26.1           ~ 5 0
23 ESO 202-43 BiC 04 37 47.655 -51 25 23.32   14.19   12.48   ~ 24 0
24 MCG-03-13-025 BiC 04 54 52.262 -18 06 56.12   13.34   11.64   ~ 66 1
25 CAN 28 ClG 04 54 52.318 -18 06 56.52           ~ 32 0
26 CAN 27 ClG 04 58.8 -00 28           ~ 12 0
27 NGC 1713 Sy2 04 58 54.6092804904 -00 29 20.290542972   13.88       ~ 65 0
28 ACO 548 ClG 05 47 01.7 -25 36 59           B8 209 2
29 MCG-04-14-033 BiC 05 48 38.3525613720 -25 28 40.090047312   14.02       ~ 41 0
30 2MASX J09083238-0937470 BiC 09 08 32.388 -09 37 47.06   14.32   13.32   ~ 41 2
31 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
32 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
33 ACO 780 ClG 09 18 30 -12 15.7           ~ 469 0
34 NGC 2832 LIN 09 19 46.853 +33 44 59.07   13.3 13.17     ~ 274 3
35 ACO 779 ClG 09 20 02.70 +33 45 29.7           ~ 261 0
36 Z 8-75 BiC 10 13 38.2582731024 -00 55 31.510821720   13.68       ~ 71 2
37 ACO 957 ClG 10 14 02.35 -00 53 30.0           ~ 225 2
38 MCG-01-27-002 BiC 10 20 26.587 -06 31 34.71   15.223   13.874   ~ 26 0
39 ACO 978 ClG 10 20 26.66 -06 31 37.5           ~ 126 1
40 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
41 NGC 3311 EmG 10 36 42.821 -27 31 42.02   11.93 10.93 10.00 9.67 ~ 310 2
42 NGC 3842 BiC 11 44 02.155 +19 56 59.37 14.22 13.70 11.82 12.04   ~ 308 3
43 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
44 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
45 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
46 2MASX J12571157-1724344 LIN 12 57 11.580 -17 24 34.47   13.50   12.56   ~ 62 2
47 ACO 1644 ClG 12 57 11.6 -17 24 34           ~ 391 1
48 NGC 4839 BiC 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 482 3
49 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
50 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
51 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1
52 NGC 4946 GiG 13 05 29.3769395952 -43 35 28.165516872   13.31   11.61   ~ 60 0
53 MCG-05-32-026 rG 13 27 56.884 -31 29 43.71   13.88 15 12.24 12.76 ~ 88 2
54 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
55 2MASX J13530637+0508586 BiC 13 53 06.3979419960 +05 08 59.034710652   15.30       ~ 37 1
56 ACO 1809 ClG 13 53 07.68 +05 08 32.7           ~ 179 0
57 ACO 1837 ClG 14 01 36.2 -11 07 48           ~ 106 0
58 LEDA 94244 EmG 14 01 36.3752546016 -11 07 43.633813296   14.87   13.48   ~ 24 0
59 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
60 IC 1101 rG 15 10 56.100 +05 44 41.19   15.10       ~ 165 2
61 ACO 2147 ClG 16 02 11.96 +15 55 11.5           ~ 416 0
62 Z 108-73 rG 16 02 17.0257413888 +15 58 28.670337876   14.9       ~ 95 0
63 NGC 6034 Sy2 16 03 32.08333486 +17 11 55.3098953   15.2       ~ 105 1
64 NGC 6047 rG 16 05 08.9880545352 +17 43 47.574625512   15.4       ~ 118 1
65 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
66 ACO 2162 ClG 16 12 30.0 +29 32 23           ~ 149 0
67 NGC 6086 LIN 16 12 35.5357829352 +29 29 05.246712168   14.8       ~ 202 1
68 NGC 6160 rG 16 27 41.122 +40 55 37.08   14.8       ~ 73 0
69 ACO 2197 ClG 16 27 48.01 +40 58 04.5           ~ 290 0
70 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
71 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 793 2
72 NGC 6173 LIN 16 29 44.8864037664 +40 48 41.890972320   14.0       ~ 180 0
73 NGC 6269 rG 16 57 58.1011343880 +27 51 15.883449192   14.4 13.73     ~ 109 1
74 AWM 5 ClG 16 58 00.8 +27 51 16     14.00     ~ 66 0
75 ACO S 805 ClG 18 47 14.4 -63 19 45           ~ 137 3
76 IC 4765 rG 18 47 18.150 -63 19 52.14   12.33 11.36 10.53 10.75 ~ 88 2
77 NGC 7012 GiG 21 06 45.5157195024 -44 48 52.793246088   13.67   12.03   ~ 22 0
78 ACO S 921 ClG 21 06 49 -44 49.9           ~ 8 0
79 ESO 146-28 G 22 28 51.0804230352 -60 52 55.480031148   14.02 12.90 12.62   ~ 26 0
80 BAX 337.2125-60.8811 ClG 22 28 51.3 -60 53 56           ~ 11 0
81 ACO S 1065 ClG 22 49 19 -37 29.1           ~ 15 1
82 MCG-06-50-003 rG 22 49 22.6378378728 -37 28 18.228688608   13.76 15.0 12.50   ~ 34 1
83 NGC 7597 GiG 23 18 30.2155492104 +18 41 20.556703500   15.3       ~ 43 0
84 ACO 2572 ClG 23 18 31.2 +18 41 52           ~ 142 1
85 NGC 7647 BiC 23 23 57.4310112528 +16 46 38.141670936   14.61 14.45     ~ 79 0
86 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 327 1
87 NGC 7649 rG 23 24 20.087 +14 38 49.68   15.65       ~ 62 1
88 ACO 2593 ClG 23 24 27.15 +14 33 40.2           ~ 231 0
89 ACO 2622 ClG 23 34 53 +27 25.6           ~ 93 0
90 4C 27.53A rG 23 35 01.4782510920 +27 22 20.679250476   15.28       ~ 50 1
91 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 515 2
92 NGC 7720 Sy1 23 38 29.38324020 +27 01 53.2580084   13.9 13.3     ~ 565 4
93 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 349 3
94 IC 5358 rG 23 47 45.1086508608 -28 08 26.650470372   13.42 14.72 11.99   ~ 88 1
95 ACO 2666 ClG 23 50 56.2 +27 08 41           ~ 204 0
96 NGC 7768 BiC 23 50 58.5485212104 +27 08 50.446633668   14.0 14.23     ~ 198 0
97 ACO 2670 ClG 23 54 10.51 -10 23 06.8           ~ 364 0
98 2MASX J23541371-1025084 LIN 23 54 13.6827414192 -10 25 08.481024912   15.32       ~ 55 2
99 MCG-06-01-008 QSO 23 57 00.7406438328 -34 45 32.994968292   13.89 13.26 12.19   ~ 131 2
100 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 400 1

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