2003A&A...398..949I

Query : 2003A&A...398..949I

2003A&A...398..949I - Astronomy and Astrophysics, volume 398949-957 (2003/2-2)

New UBVRI color distributions in E-type galaxies. II. Central and mean metallicities.

IDIART T.P., MICHARD R. and DE FREITAS PACHECO J.A.

Abstract (from CDS):

Central and mean metallicities are calculated for a sample of 40 early-type galaxies, whose color gradients were reported in a previous paper (Idiart et al., 2002A&A...383...30I). The present color-metallicity calibration was derived from a grid of evolutionary models which fit the color-magnitude sequence of ellipticals in Coma and Virgo clusters. The mean metallicity gradient derived from our data is (Δ[Fe/H]/Δlogr)=-0.26±0.08 and the mean sample average metallicity is <[Fe/H]≥0.01±0.11 (rmsd). Central and mean metallicities are correlated with the central velocity dispersion, consistent with the interpretation by metallicity variations of the color-magnitude sequence and of color gradients. Age effects are also discussed, in particular concerning the interpretation of the Hβ line strength in those objects.

Abstract Copyright: ∼

Journal keyword(s): galaxies: ellipticals and lenticular, cD - galaxies: abundances

Simbad objects: 43

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Number of rows : 43
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 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 526 2
2 NGC 2974 Sy2 09 42 33.2918467632 -03 41 57.038311068   12.19   10.77   ~ 463 0
3 NGC 3115 GiG 10 05 13.9270507008 -07 43 06.982712292   11   9.37   ~ 1067 2
4 NGC 3193 GiP 10 18 24.884 +21 53 38.32 12.29 11.83 10.88 12.19   ~ 301 1
5 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 798 1
6 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1504 0
7 NGC 3605 GiG 11 16 46.5896102400 +18 01 01.777666908   12.7       ~ 261 0
8 NGC 3607 Sy2 11 16 54.65687 +18 03 06.5120   13.84 12.76     ~ 490 1
9 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 527 0
10 NGC 3610 GiG 11 18 25.2827189856 +58 47 10.433735988   11.4       ~ 327 0
11 NGC 3613 GiG 11 18 36.130 +57 59 59.73   11.6       ~ 221 0
12 NGC 3640 GiG 11 21 06.852 +03 14 05.15 11.89 11.36 10.44     ~ 291 3
13 NGC 3872 GiP 11 45 49.069 +13 46 00.07   12.9       ~ 96 0
14 NGC 4125 GiP 12 08 06.017 +65 10 26.88 11.14 10.65 9.72     ~ 448 2
15 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
16 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 988 2
17 NGC 4283 GiG 12 20 20.7691223880 +29 18 39.154727556 13.47 13.00 12.07     ~ 209 1
18 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 871 0
19 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1841 2
20 NGC 4387 GiG 12 25 41.6768484264 +12 48 37.804615956 13.42 13.01 12.12   10.87 ~ 409 1
21 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1126 1
22 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
23 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 671 1
24 NGC 4478 GiP 12 30 17.4160005576 +12 19 42.790577160 12.82 12.36 11.45   10.17 ~ 508 1
25 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
26 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
27 NGC 4494 GiP 12 31 24.0391348536 +25 46 30.071664120   10.55 9.74     ~ 491 0
28 NGC 4550 GiP 12 35 30.5913588048 +12 13 14.921166792 12.97 12.56 11.68     ~ 558 1
29 NGC 4551 GiP 12 35 37.9542692328 +12 15 50.284593432 13.49 12.97 12.02     ~ 371 1
30 M 89 Sy2 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 1037 2
31 NGC 4564 GiG 12 36 26.9869512504 +11 26 21.204472848 12.51 12.05 11.12     ~ 615 1
32 M 59 GiG 12 42 02.2581375168 +11 38 48.909507756   11.0       ~ 721 0
33 NAME NGC 4636 Group GrG 12 42 49.5 +02 41 08           ~ 570 0
34 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
35 M 60 GiC 12 43 39.9708251934 +11 33 09.688174067   10.3       ~ 1395 1
36 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
37 NGC 5322 SyG 13 49 15.24 +60 11 25.8   11.3       ~ 432 2
38 NGC 5576 GiP 14 21 03.691 +03 16 15.78 12.25 11.85 10.96     ~ 347 1
39 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
40 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 304 0
41 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
42 M 102 SyG 15 06 29.561 +55 45 47.91 11.12 10.74 9.89     ~ 578 2
43 NGC 5982 LIN 15 38 39.778 +59 21 21.21   12.4       ~ 302 0

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