2006A&A...457..787S

Query : 2006A&A...457..787S

2006A&A...457..787S - Astronomy and Astrophysics, volume 457787-808 (2006/10-3)

Stellar populations of early-type galaxies in different environments. I. Line-strength indices. Relations of line-strengths with σ.

SANCHEZ-BLAZQUEZ P., GORGAS J., CARDIEL N. and GONZALEZ J.J.

Abstract (from CDS):

This paper commences a series devoted to the study of the stellar content of early-type galaxies. The goal of the series is to set constraints on the evolutionary status of these objects. In this paper we describe the details of the galaxy sample, the observations, and the data reduction. Line-strength indices and velocity dispersions (σ) are measured in 98 early-type galaxies drawn from different environments, and the relation of the indices with the velocity dispersion analysed in detail. The present sample indicates that some of the index-σ relations depend on galaxy environment. In particular, the slope of the relation between Balmer lines and σ is steeper for galaxies in the Virgo cluster, small groups, and in the field than for galaxies in the Coma cluster. In several indices there is also a significant offset in the zero point between the relations defined by the different subsamples. The slopes of the index-σ relation for the Virgo and low-density environment galaxies are explained by a variation of both age and metallicity, with velocity dispersion, as previously noted in other studies. For the galaxies in the Coma cluster, however, the relation of the indices with σ only requires a variation of the abundance along the σ sequence. In agreement with other studies, we find that the models that better reproduce the slopes are those in which the α elements vary more than the Fe-peak elements along the σ sequence, while, at a given σ, older galaxies show an higher α/Fe ratio. The results can be explained assuming that galaxies in the Coma cluster have experienced a truncated star formation and chemical enrichment history compared to a more continuous time-extended history for their counterparts in lower density environments.

Abstract Copyright: ∼

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

CDS comments: Table 1 objects DRCG 27-NNN are [D80] ACO 1656 NNN in Simbad.

Simbad objects: 129

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Number of rows : 129
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 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
2 NAME M31 Group GrG 00 47 28.6 +40 17 23           ~ 65 0
3 NGC 315 LIN 00 57 48.88334410 +30 21 08.8119345 12.80 12.20 11.16 11.26   ~ 869 2
4 LGG 18 GrG 01 10 41.2 +32 11 23           ~ 11 0
5 NGC 507 rG 01 23 39.950 +33 15 22.22   13.0       ~ 459 1
6 LGG 26 GrG 01 27 17.2 +34 19 08           ~ 6 0
7 NGC 584 Sy2 01 31 20.7231919800 -06 52 04.770287472 11.93 11.44 10.48     ~ 417 2
8 NAME NGC 584 Group GrG 01 33 21.4 -07 01 17           ~ 20 0
9 NGC 636 EmG 01 39 06.5293238064 -07 30 45.475975296   12.5       ~ 196 0
10 NGC 821 AG? 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 592 0
11 LGG 103 GrG 03 43 07.8 -04 18 07           ~ 13 0
12 NGC 1453 EmG 03 46 27.2307890592 -03 58 07.831476768   13   11.30   ~ 189 0
13 NGC 1600 rG 04 31 39.858 -05 05 09.97   8.9   10.81   ~ 409 1
14 LGG 123 GrG 04 56 38 -04 44.6           ~ 5 0
15 NGC 1700 EmG 04 56 56.3160873072 -04 51 56.794713228   12   11.14   ~ 356 1
16 NGC 2329 rG 07 09 08.0049393360 +48 36 55.726108020   13.7 13.99     ~ 143 3
17 ACO 569 ClG 07 09 10.4 +48 37 10           ~ 172 1
18 NGC 2300 AG? 07 32 20.486 +85 42 31.90   12.2       ~ 346 0
19 NGC 2694 AG? 08 56 59.2596816360 +51 19 55.035258924   15.5       ~ 52 0
20 NGC 2693 GiG 08 56 59.2620417624 +51 20 50.738224092 13.45 12.84 11.88     ~ 137 1
21 LGG 168 GrG 09 06 47.0 +50 36 58           ~ 3 0
22 LGG 171 GrG 09 11 26.2 +34 56 06           ~ 5 0
23 NGC 2778 GiP 09 12 24.3741783168 +35 01 39.140496840   13.1       ~ 303 0
24 NGC 2832 LIN 09 19 46.853 +33 44 59.07   13.3 13.17     ~ 274 3
25 ACO 779 ClG 09 20 02.70 +33 45 29.7           ~ 261 0
26 NGC 3115 GiG 10 05 13.9270507008 -07 43 06.982712292   11   9.37   ~ 1067 2
27 NAME M 96 Group GrG 10 46 45 +11 49.1           ~ 330 0
28 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 798 1
29 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1504 0
30 LGG 217 GrG 10 48 34.7 +12 40 15           ~ 8 0
31 NGC 3605 GiG 11 16 46.5896102400 +18 01 01.777666908   12.7       ~ 261 0
32 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 527 0
33 LGG 233 GrG 11 20 41.4 +03 15 19           ~ 8 0
34 NGC 3641 GiG 11 21 08.8111086864 +03 11 40.530956028   14.10 13.20     ~ 113 1
35 LGG 236 GrG 11 23 59.4 +38 40 42           ~ 8 0
36 LGG 237 GrG 11 24 25.6 +17 22 44           ~ 5 0
37 NGC 3665 GiG 11 24 43.630 +38 45 46.05 13.71 13.26 11.62     ~ 364 1
38 NGC 3818 EmG 11 41 57.3563891040 -06 09 20.459153376   13   11.78   ~ 186 0
39 IC 767 GiG 12 11 02.7290142024 +12 06 14.382907236   14.6       ~ 64 0
40 LGG 278 GrG 12 17 45.9 +06 09 17           ~ 9 0
41 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
42 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 988 2
43 NAME Coma I Group GrG 12 22 19.4 +29 53 47           ~ 112 0
44 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 871 0
45 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1841 2
46 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1126 1
47 NGC 4415 GiG 12 26 40.4842511880 +08 26 08.595255480   14.2       ~ 120 0
48 NGC 4431 GiP 12 27 27.3817521552 +12 17 25.041554808 14.17 13.74 12.89     ~ 171 2
49 LGG 286 GrG 12 27 59 +12 49.4           ~ 3 0
50 IC 794 GiG 12 28 08.6096744256 +12 05 35.874205512   14.07 13.44   12.39 ~ 121 1
51 NGC 4464 GiG 12 29 21.2937802368 +08 09 23.807609316   13.5       ~ 242 0
52 NGC 4467 GiG 12 29 30.2447376768 +07 59 34.273371336   15.2       ~ 187 0
53 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
54 NGC 4478 GiP 12 30 17.4160005576 +12 19 42.790577160 12.82 12.36 11.45   10.17 ~ 508 1
55 NGC 4486B GiG 12 30 31.985 +12 29 24.85   14.5       ~ 428 0
56 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
57 NAME Virgo A Cluster GrG 12 30 49.2 +12 23 30           ~ 154 0
58 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
59 NGC 4489 GiG 12 30 52.2472748976 +16 45 31.866359004   13.2       ~ 264 0
60 NAME Vir B Cluster GrG 12 33 39.3 +10 10 57           ~ 143 0
61 M 89 Sy2 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 1037 2
62 NGC 4564 GiG 12 36 26.9869512504 +11 26 21.204472848 12.51 12.05 11.12     ~ 615 1
63 IC 3618 GiG 12 39 17.1257804112 +26 40 39.972372780   15.5       ~ 42 0
64 Z 159-43 GiG 12 39 18.9012835104 +27 46 24.663003852   15.3       ~ 44 0
65 M 104 LIN 12 39 59.43185902 -11 37 22.9961800 9.51 9.55 8.00 8.05   ~ 1465 2
66 M 59 GiG 12 42 02.2581375168 +11 38 48.909507756   11.0       ~ 721 0
67 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
68 M 60 GiC 12 43 39.9708251934 +11 33 09.688174067   10.3       ~ 1395 1
69 NGC 4673 GiG 12 45 34.6697689368 +27 03 38.999971728   13.7       ~ 85 0
70 NGC 4692 GiG 12 47 55.3116821448 +27 13 20.444822832   14.0       ~ 69 0
71 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 895 0
72 Z 159-83 EmG 12 49 42.2824118760 +26 53 31.218447156   14.9       ~ 57 0
73 Z 159-89 GiG 12 50 54.0392305128 +27 50 30.469067772   14.8       ~ 56 0
74 LGG 307 GrG 12 51 20.6 -10 00 46           ~ 5 0
75 NGC 4742 GiG 12 51 48.0416784480 -10 27 17.196625800   12   11.55   ~ 235 1
76 LGG 314 GrG 12 53 55.1 -06 15 41           ~ 8 0
77 IC 832 LIN 12 53 59.1049409712 +26 26 38.493325104   15.0       ~ 58 0
78 LEDA 83685 GiC 12 57 22.9237474704 +27 29 34.788416604   15.3       ~ 32 0
79 NGC 4839 BiC 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 482 3
80 NGC 4842A LIN 12 57 35.8534614792 +27 29 35.689996896   14.9       ~ 87 0
81 NGC 4842B LIN 12 57 36.1334483592 +27 29 05.381539332   16.30 15.46 15.15   ~ 57 1
82 IC 3957 GiC 12 59 07.5004634112 +27 46 04.045220580 16.15 15.862 14.72 14.332 13.683 ~ 113 0
83 IC 3959 GiG 12 59 08.2121809416 +27 47 02.945321736 15.56 15.2 14.03 13.771 13.064 ~ 143 0
84 NGC 4864 GiG 12 59 13.129 +27 58 36.91 15.338 14.8 13.872 13.321 12.594 ~ 136 0
85 IC 3963 GiC 12 59 13.5007965936 +27 46 28.624729584 16.11 15.837 14.72 14.33 13.71 ~ 91 0
86 NGC 4867 GiG 12 59 15.2505719952 +27 58 14.616353712 15.60 15.5 14.14 13.969 13.213 ~ 129 0
87 NGC 4865 EmG 12 59 19.8737739096 +28 05 03.488821044 15.06 14.6 13.692 13.131 12.443 ~ 115 0
88 MCG+05-31-063 G 12 59 20.5 +28 03 58 21.70 15.6 19.76     ~ 8 0
89 IC 3973 AG? 12 59 30.8230953864 +27 53 03.142254372 15.50 15.2 14.03 13.802 13.114 ~ 112 0
90 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
91 NGC 4875 GiC 12 59 37.9093929384 +27 54 26.400242232 16.03 15.92 14.57 14.322 13.605 ~ 99 0
92 LEDA 44644 G 12 59 39.6590757624 +27 57 14.115321252 16.97 16.99 15.59 15.41 14.99 ~ 75 0
93 LEDA 44651 EmG 12 59 40.2735433608 +27 58 05.677395348 17.47 17.375 16.02 15.812 15.153 ~ 62 0
94 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
95 GMP 3196 GiC 12 59 44.6993296392 +27 53 23.131781592 18.55 18.50 17.19 16.85 16.53 ~ 25 0
96 LEDA 1821341 G 12 59 50.18143 +27 54 45.4993 18.60 18.68 17.40 17.10 17.0 ~ 33 0
97 2MASX J12595140+2804232 GiC 12 59 51.409 +28 04 23.29 17.87 17.71 16.23 15.85 15.573 ~ 28 0
98 2MASX J12595760+2803543 GiC 12 59 57.607 +28 03 54.32 17.97 17.914 16.59 16.27 15.891 ~ 40 0
99 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1
100 2MASX J13001702+2803502 GiC 13 00 17.0317499136 +28 03 50.085089820 16.89 16.855 15.52 15.321 14.643 ~ 70 0
101 IC 4026 EmG 13 00 22.1409893328 +28 02 49.238219148 15.99 15.5 14.63 14.202 13.553 ~ 104 0
102 LEDA 126756 G 13 00 24.82156 +27 55 35.8484 18.50 18.52 16.57 16.21 16.499 ~ 36 0
103 LEDA 1822111 G 13 00 35.422 +27 56 33.88 18.56 18.66 16.79 16.47 16.629 ~ 32 0
104 IC 4042 AGN 13 00 42.7595583480 +27 58 16.579136856 15.44 15.272 14.01 13.713 13.025 ~ 105 0
105 LEDA 44809 EmG 13 00 42.8383665048 +27 57 47.226609072 16.34 16.013 14.96 14.501 13.813 ~ 80 0
106 NGC 4908 LIN 13 00 51.5428778808 +28 02 34.346182596 15.05 14.9 13.58 13.273 12.566 ~ 125 0
107 IC 4051 EmG 13 00 54.4630403184 +28 00 27.502143300 15.04 14.8 13.50 13.003 12.305 ~ 218 0
108 NGC 5638 GiP 14 29 40.3717451400 +03 13 59.987811648 12.57 12.14 11.20     ~ 252 2
109 LGG 386 GrG 14 39 38.0 +02 07 50           ~ 8 0
110 NGC 5796 GiP 14 59 24.115 -16 37 26.55   13   11.37   ~ 118 0
111 NGC 5812 EmG 15 00 55.708 -07 27 26.33   12   11.19   ~ 164 0
112 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
113 LGG 392 GrG 15 03 50 +01 55.6           ~ 6 0
114 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 304 0
115 NAME NGC 5846 Group GrG 15 05 47.0 +01 34 25           ~ 165 0
116 NGC 5845 GiG 15 06 00.7823239488 +01 38 01.704838596   13.8 11.20 12.06 9.94 ~ 403 0
117 NGC 5846A GiP 15 06 29.2023813744 +01 35 41.627266512   14.1 13.37 13.07 12.1 ~ 125 0
118 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
119 NGC 6125 AG? 16 19 11.5344941208 +57 59 02.863041504   13.0       ~ 106 0
120 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
121 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 793 2
122 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
123 NGC 6411 AG? 17 35 32.8446342384 +60 48 48.236693796   13.2       ~ 119 0
124 NGC 6482 GiG 17 51 48.8339247888 +23 04 18.889271112 12.71 12.35 11.45     ~ 220 1
125 NGC 6577 rG 18 12 01.2299050529 +21 27 48.442466070   14.7       ~ 31 1
126 NGC 6702 AG? 18 46 57.5835209136 +45 42 20.305242180 15.30 14.73 13.05     ~ 148 0
127 NGC 6703 AG? 18 47 18.8166660360 +45 33 02.274865812   12.29 11.34     ~ 225 0
128 NGC 7052 rG 21 18 33.0441963648 +26 26 49.174586196 15.52 14.85 13.09     ~ 348 1
129 NGC 7332 GiP 22 37 24.5373044952 +23 47 53.830708800   12.0       ~ 391 0

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