2006A&A...457..823S


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET20:52:50

2006A&A...457..823S - Astronomy and Astrophysics, volume 457, 823-839 (2006/10-3)

Stellar populations of early-type galaxies in different environments. III. Line-strength gradients.

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

Abstract (from CDS):

This is the third paper of 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. We present line-strength gradients for 22 spectral indices measured in a sample of 82 early-type galaxies in different environments, including the high-density cores of the Coma cluster, the Virgo cluster, poor groups, and isolated field galaxies. Using new evolutionary population synthesis models, we derive age and metallicity gradients, and compare the mean values with the predictions of different galaxy formation models. We explore the behaviour of individual chemical species by deriving the metallicity gradient with different indicators. We find that the strength of the metallicity gradient inferred from stellar population models depends on the specific Lick index employed. In particular, metallicity gradients obtained with CN2 and C4668 combined with Hβ are steeper than those measured using Ca4227 or Fe4383. The correlation of the metallicity gradients with other parameters also depends on the specific index employed. If the metallicity gradient is obtained using CN2 and Mgb, then it correlates with the central age of the galaxies. On the contrary, if Fe4383 or Ca4227 is used, the metallicity gradient correlates with the velocity dispersion gradient. This may suggest that several mechanisms have helped to set the age and metallicity gradients in early-type galaxies. While we do not find any correlation between the metallicity gradient and the central velocity dispersion for galaxies in low-density environments, we find a marginal correlation between the metallicity gradient and the mass for galaxies in the centre of the Coma cluster. We also find a trend for which galaxies in denser environments show a steeper metallicity gradient than galaxies in less dense environments. We interpret these results in light of the different mechanisms proposed to explain the observed changes between galaxies as a function of environment.

Abstract Copyright:

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

Simbad objects: 84

goto Full paper

goto View the reference in ADS

Number of rows : 84

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 2034 2
2 NGC 315 LIN 00 57 48.88335 +30 21 08.8122 12.80 12.20 11.16 11.26   ~ 719 2
3 NGC 507 BiC 01 23 39.950 +33 15 22.22   13.0       ~ 399 3
4 NGC 584 GiP 01 31 20.755 -06 52 05.02 11.93 11.44 10.48     ~ 369 2
5 NGC 636 GiG 01 39 06.529 -07 30 45.37   12.5       ~ 181 0
6 NGC 821 G 02 08 21.150 +10 59 41.53   12.210 11.310 10.739 9.744 ~ 545 0
7 NGC 1453 GiG 03 46 27.269 -03 58 07.55   13   11.30   ~ 155 0
8 NGC 1600 GiG 04 31 39.858 -05 05 09.97   8.9   10.81   ~ 337 0
9 NGC 1700 GiG 04 56 56.347 -04 51 56.64   12   11.14   ~ 333 1
10 NGC 2329 AGN 07 09 08.0060407484 +48 36 55.739351597   13.7 13.99     ~ 118 3
11 NGC 2300 IG 07 32 20.486 +85 42 31.90   12.2       ~ 317 0
12 NGC 2693 GiG 08 56 59.246 +51 20 50.49 13.45 12.84 11.88     ~ 115 1
13 NGC 2694 G 08 56 59.2589823857 +51 19 55.043499519   15.5       ~ 45 0
14 NGC 2778 GiP 09 12 24.3746247420 +35 01 39.130438907   13.1       ~ 269 0
15 NGC 2832 BiC 09 19 46.853 +33 44 59.07   13.3 13.17     ~ 248 3
16 NGC 3115 GiG 10 05 13.978 -07 43 06.89   11   9.37   ~ 942 2
17 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 735 1
18 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1392 0
19 NGC 3605 GiG 11 16 46.622 +18 01 01.71   12.7       ~ 245 0
20 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 482 0
21 NGC 3641 GiG 11 21 08.8116222566 +03 11 40.530887495   14.10 13.20     ~ 96 1
22 NGC 3665 rG 11 24 43.630 +38 45 46.05 13.71 13.26 11.62     ~ 308 1
23 NGC 3818 GiG 11 41 57.3592664401 -06 09 20.448440482   13   11.78   ~ 171 0
24 IC 767 GiG 12 11 02.7295327117 +12 06 14.387322515   14.6       ~ 50 0
25 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1132 0
26 NGC 4278 LIN 12 20 06.8253868 +29 16 50.713486 11.54 11.09 10.16     ~ 895 2
27 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 805 0
28 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1662 2
29 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5979 0
30 NGC 4415 GiG 12 26 40.4850067522 +08 26 08.578644376   14.2       ~ 99 0
31 NGC 4431 GiP 12 27 27.3822223151 +12 17 25.034830442 14.17 13.74 12.89     ~ 150 1
32 IC 794 GiG 12 28 08.6084194302 +12 05 35.868939739   14.07 13.44   12.39 ~ 100 1
33 NGC 4464 GiG 12 29 21.313 +08 09 23.63   13.5       ~ 219 0
34 NGC 4467 GiG 12 29 30.267 +07 59 34.62   15.2       ~ 163 0
35 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1984 2
36 NGC 4478 GiP 12 30 17.439 +12 19 42.88 12.82 12.36 11.45   10.17 ~ 474 1
37 UGCA 283 GiG 12 30 31.985 +12 29 24.85   14.5       ~ 388 0
38 NGC 4489 GiG 12 30 52.240 +16 45 31.31   13.2       ~ 242 0
39 M 89 LIN 12 35 39.8073444 +12 33 22.830809 11.29 10.73 9.75     ~ 938 2
40 NGC 4564 GiG 12 36 26.994 +11 26 21.55 12.51 12.05 11.12     ~ 569 1
41 IC 3618 GiG 12 39 17.1236649221 +26 40 39.991093297   15.5       ~ 37 0
42 MCG+05-30-048 GiG 12 39 18.9004373332 +27 46 24.666090443   15.3       ~ 41 0
43 M 104 LIN 12 39 59.43185 -11 37 22.9954 9.51 9.55 8.00 8.05   ~ 1295 3
44 M 59 GiG 12 42 02.322 +11 38 48.95   11.0       ~ 667 0
45 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1048 1
46 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1265 0
47 NGC 4673 GiG 12 45 34.706 +27 03 38.61   13.7       ~ 80 0
48 NGC 4692 GiG 12 47 55.3114447860 +27 13 20.435601614   14.0       ~ 64 0
49 NGC 4697 GiG 12 48 35.8992791099 -05 48 02.497675635   10.97   9.83   ~ 813 0
50 MCG+05-30-094 EmG 12 49 42.2826055080 +26 53 31.215813513   14.9       ~ 50 0
51 MCG+05-30-101 GiG 12 50 54.0390607247 +27 50 30.466246871   14.8       ~ 51 0
52 NGC 4742 GiG 12 51 48.0411725334 -10 27 17.200326999   12   11.55   ~ 214 1
53 IC 832 LIN 12 53 59.1047721802 +26 26 38.492290193   15.0       ~ 50 0
54 NGC 4839 rG 12 57 24.353 +27 29 51.80 13.56 13.02 12.06     ~ 432 3
55 NGC 4842 G 12 57 35.8533828680 +27 29 35.687792422   14.9       ~ 76 0
56 IC 3957 GiC 12 59 07.5001740726 +27 46 04.044641926 16.15 15.862 14.72 14.332 13.683 ~ 105 0
57 IC 3959 GiG 12 59 08.200 +27 47 02.82 15.56 15.2 14.03 13.771 13.064 ~ 131 0
58 NGC 4864 GiG 12 59 13.129 +27 58 36.91 15.338 14.8 13.872 13.321 12.594 ~ 129 0
59 IC 3963 GiC 12 59 13.5008761088 +27 46 28.624742868 16.11 15.837 14.72 14.33 13.71 ~ 75 0
60 NGC 4865 GiG 12 59 19.8715789990 +28 05 03.527652983 15.06 14.6 13.692 13.131 12.443 ~ 102 0
61 IC 3973 G 12 59 30.8226348968 +27 53 03.169645916 15.50 15.2 14.03 13.802 13.114 ~ 99 0
62 NGC 4874 LIN 12 59 35.709 +27 57 33.80 13.01 13.7 11.40 12.122 11.386 ~ 730 3
63 NGC 4875 GiC 12 59 37.9094191824 +27 54 26.397642327 16.03 15.92 14.57 14.322 13.605 ~ 88 0
64 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4317 2
65 NGC 4889 BiC 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 658 1
66 IC 4042 AGN 13 00 42.7593522197 +27 58 16.582669061 15.44 15.272 14.01 13.713 13.025 ~ 93 0
67 NGC 4908 LIN 13 00 51.581 +28 02 34.19 15.05 14.9 13.58 13.273 12.566 ~ 115 0
68 IC 4051 GiG 13 00 54.456 +28 00 27.20 15.04 14.8 13.50 13.003 12.305 ~ 202 0
69 NGC 5638 GiP 14 29 40.389 +03 14 00.39 12.57 12.14 11.20     ~ 229 2
70 NGC 5796 GiP 14 59 24.115 -16 37 26.55   13   11.37   ~ 105 0
71 NGC 5812 GiP 15 00 55.708 -07 27 26.33   12   11.19   ~ 151 0
72 NGC 5813 LIN 15 01 11.265 +01 42 07.09 12.00 11.45 10.46 10.06   ~ 588 1
73 NGC 5831 GiG 15 04 07.024 +01 13 11.70   13.1   11.19   ~ 281 0
74 NGC 5845 GiG 15 06 00.787 +01 38 01.77   13.8 11.20 12.06 9.94 ~ 360 0
75 MCG+00-38-026 GiP 15 06 29.199 +01 35 41.55   14.1 13.37 13.07 12.1 ~ 108 0
76 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 786 1
77 NGC 6125 G 16 19 11.554 +57 59 02.80   13.0       ~ 88 0
78 3C 338.0 QSO 16 28 38.2447110 +39 33 04.233634   12.78 11.78     ~ 713 5
79 NGC 6411 G 17 35 32.820 +60 48 48.19   13.2       ~ 105 0
80 NGC 6482 GiG 17 51 48.8334002678 +23 04 18.884647281 12.71 12.35 11.45     ~ 192 1
81 NGC 6702 G 18 46 57.5820964893 +45 42 20.301418496 15.30 14.73 13.05     ~ 133 0
82 NGC 6703 G 18 47 18.8165361086 +45 33 02.284879274   12.29 11.34     ~ 209 0
83 NGC 7052 rG 21 18 33.047 +26 26 48.65 15.52 14.85 13.09     ~ 303 1
84 NGC 7332 GiP 22 37 24.522 +23 47 54.06   12.0       ~ 358 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2006A&A...457..823S and select 'bookmark this link' or equivalent in the popup menu


2021.02.26-20:52:51

© Université de Strasbourg/CNRS

    • Contact