2004A&A...423..833M

Query : 2004A&A...423..833M

2004A&A...423..833M - Astronomy and Astrophysics, volume 423, 833-847 (2004/9-1)

Peculiarities and populations in elliptical galaxies. I. An old question revisited.

MICHARD R. and PRUGNIEL P.

Abstract (from CDS):

Morphological peculiarities, as defined from isophote asymmetries and number of detected shells, jets or similar features, have been estimated in a sample of 117 E classified galaxies, and qualified by an ad hoc Σ2 index. The overall frequency of ``peculiar'' objects (Pec subsample) is 32.5%. It decreases with the cosmic density of the environment, being minimal for the Virgo cluster, the densest environment in the sampled volume. This environmental effect is stronger for galaxies with relatively large Σ2. The Pec subsample objects are compared with ``normal'' objects (Nop subsample) as regards their basic properties. Firstly, they systematically deviate from the Fundamental Plane and the Faber-Jackson relation derived for the Nop subsample, being too bright for their mass. Secondly, the dust content of galaxies, as estimated from IRAS fluxes, are similar in both subsamples. Third, the same is true of the frequency of Kinematically Distinct cores (KDC), suggesting that KDC and morphological peculiarities do not result from the same events in the history of E-galaxies. Using the Nop sample alone, we obtain very tight reference relations between stellar population indicators (U-B, B-V, B-R, V-I, Mg2, Hβ, <Fe>, Mgb) and the central velocity dispersion σ0. The discussion of the residuals of these relations allows us to classify the Pec galaxies in two families i.e. the YP or NGC 2865 family, and the NP or NGC 3923 one. Galaxies in the first group show consistent evidence for a younger stellar population mixed with the old one, in agreement with classical results (Schweizer et al., 1990ApJ...364L..33S; Schweizer & Seitzer, 1992AJ....104.1039S). The second group, however, has ``normal``, or reddish, populations. It is remarkable that a fraction (circa 40%) of morphologically perturbed objects do not display any signature of a young population, either because the event responsible for the pecularity is too ancient, or because it did not produce significant star formation (or eventually that the young sub-population has high metallicity). A preliminary attempt is made to interpret the populations of Pec objects by combining a young Single Stellar Population with a Nop galaxy, with only limited success, perhaps largely due to uncertainties in the SSP indices used.

Abstract Copyright: ∼

Journal keyword(s): galaxies: elliptical and lenticulars, CD - galaxies: photometry

VizieR on-line data: <Available at CDS (J/A+A/423/833): table7.dat table10.dat>

Simbad objects: 118

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Number of rows : 118
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 584 Sy2 01 31 20.7231919800 -06 52 04.770287472 11.93 11.44 10.48     ~ 402 2
2 NGC 596 GiG 01 32 51.9046959816 -07 01 53.646821220   11.5       ~ 240 0
3 NGC 636 EmG 01 39 06.5293238064 -07 30 45.475975296   12.5       ~ 190 0
4 2E 0150.5-1358 ClG 01 53 00.40 -13 44 18.0           ~ 387 0
5 NGC 720 Sy1 01 53 00.523 -13 44 19.25   12.4   10.36   ~ 522 0
6 NGC 821 AG? 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 572 0
7 NGC 990 GiG 02 36 18.206 +11 38 31.57   13.9       ~ 45 0
8 NGC 1052 Sy2 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1299 2
9 NGC 1172 GiP 03 01 36.0605047968 -14 50 11.499147312   12.87       ~ 149 0
10 NGC 1199 GiP 03 03 38.4220343160 -15 36 48.461862600   13.99 12.97 12.31 11.59 ~ 184 1
11 NGC 1209 EmG 03 06 03.020 -15 36 40.58   12   11.42   ~ 146 0
12 NGC 1339 EmG 03 28 06.5493649512 -32 17 09.840527844   12.63   11.18   ~ 163 0
13 NGC 1340 GiG 03 28 19.6251763296 -31 04 05.435465520   11.20 10.32 9.70   ~ 214 1
14 NGC 1374 EmG 03 35 16.5885737352 -35 13 34.563417168 12.46 11.97 11.08 10.59   ~ 297 1
15 NGC 1379 GiP 03 36 03.9668625792 -35 26 28.547476800 12.17 12.04 10.91 10.60   ~ 265 1
16 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1570 1
17 NGC 1395 SyG 03 38 29.789 -23 01 39.69   10.71   8.99   ~ 279 0
18 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 751 1
19 NGC 1407 GiG 03 40 11.904 -18 34 49.36   10.64 9.67 9.13   ~ 585 1
20 NGC 1427 GiG 03 42 19.4455150392 -35 23 33.169251120   11.89   10.44   ~ 281 0
21 NGC 1426 GiG 03 42 49.0997091480 -22 06 30.173615028   12.21 11.44 10.90   ~ 196 0
22 NGC 1439 GiG 03 44 49.9398454104 -21 55 14.341002960   12.23   10.86   ~ 172 0
23 NGC 1453 EmG 03 46 27.2307890592 -03 58 07.831476768   13   11.30   ~ 180 0
24 NGC 1537 GiG 04 13 40.6728494904 -31 38 42.789379560   11.54   10.11   ~ 102 0
25 NGC 1549 GiP 04 15 45.223 -55 35 32.50 11.22 10.48 9.79 9.08   ~ 240 1
26 NGC 1600 GiG 04 31 39.858 -05 05 09.97   8.9   10.81   ~ 381 0
27 NGC 1653 Sy2 04 45 47.3444905032 -02 23 34.441646712   12.9       ~ 59 0
28 NGC 1700 EmG 04 56 56.3160873072 -04 51 56.794713228   12   11.14   ~ 348 1
29 NGC 2305 GiG 06 48 37.2713054112 -64 16 23.745616176   12.82   10.98   ~ 77 0
30 NGC 2314 GiG 07 10 32.5398383160 +75 19 36.192302256   13.1       ~ 80 1
31 NGC 2434 EmG 07 34 51.1504542360 -69 17 02.996020032 12.82 12.50 11.26 10.84   ~ 186 1
32 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 503 2
33 NGC 2778 GiP 09 12 24.3741783168 +35 01 39.140496840   13.1       ~ 287 0
34 NGC 2865 GiG 09 23 30.205 -23 09 41.37   12.39 11.43 11.06   ~ 240 0
35 NGC 2974 Sy2 09 42 33.2918467632 -03 41 57.038311068   12.19   10.77   ~ 438 0
36 NGC 2986 EmG 09 44 16.0193679072 -21 16 40.971622512   11.60 10.93 9.96   ~ 168 0
37 NGC 3078 AGN 09 58 24.59498715 -26 55 35.9552427   12.00 11.07 10.51   ~ 156 0
38 NGC 3087 EmG 09 59 08.6617003728 -34 13 30.853679304   12.69 11.55 11.02   ~ 82 0
39 NGC 3091 BiC 10 00 14.125 -19 38 11.32   12.04 10.61 10.56 9.25 ~ 184 0
40 NGC 3193 GiP 10 18 24.884 +21 53 38.32 12.29 11.83 10.88 12.19   ~ 289 1
41 NGC 3226 GiP 10 23 27.0064075320 +19 53 54.674937420   14.32 13.33     ~ 428 1
42 NGC 3250 GiG 10 26 32.2832570136 -39 56 38.471500356   12.26 11.03 10.57   ~ 95 0
43 NGC 3258 EmG 10 28 53.588 -35 36 19.98   12.50 11.72 10.86   ~ 187 0
44 NGC 3268 EmG 10 30 00.6490581240 -35 19 31.519591284   12.57 11.77 10.68   ~ 154 0
45 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 775 1
46 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1463 0
47 NGC 3557 Sy1 11 09 57.653 -37 32 21.02   11.50 10.40 9.79   ~ 275 2
48 NGC 3585 GiG 11 13 17.109 -26 45 17.96   10.64   9.22   ~ 289 0
49 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 508 0
50 NGC 3610 GiG 11 18 25.2827189856 +58 47 10.433735988   11.4       ~ 311 0
51 NGC 3613 GiG 11 18 36.130 +57 59 59.73   11.6       ~ 213 0
52 NGC 3640 GiG 11 21 06.852 +03 14 05.15 11.89 11.36 10.44     ~ 275 3
53 NGC 3818 EmG 11 41 57.3563891040 -06 09 20.459153376   13   11.78   ~ 178 0
54 NGC 3904 GiG 11 49 13.206 -29 16 36.09   11.82 10.96 10.29   ~ 156 0
55 NGC 3923 GiG 11 51 01.783 -28 48 22.36 11.41 10.59 9.80 8.88   ~ 439 1
56 NGC 3962 LIN 11 54 40.0986420456 -13 58 30.234748836   13.16 12.16 11.15   ~ 154 0
57 NGC 4125 GiP 12 08 06.017 +65 10 26.88 11.14 10.65 9.72     ~ 427 2
58 NGC 4168 Sy1 12 12 17.2692381408 +13 12 18.688208724 12.58 12.11 11.18     ~ 376 2
59 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1223 0
60 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 946 2
61 NGC 4291 GiG 12 20 17.699 +75 22 15.47   17.0       ~ 304 1
62 NGC 4339 GiP 12 23 34.9398092592 +06 04 54.467043780   13.1       ~ 242 0
63 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 841 0
64 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1762 2
65 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1084 1
66 IC 3370 Sy2 12 27 37.3278534168 -39 20 16.247588712   11.99 12.12 10.39   ~ 149 0
67 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2093 2
68 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 644 1
69 NGC 4478 GiP 12 30 17.4160005576 +12 19 42.790577160 12.82 12.36 11.45   10.17 ~ 490 1
70 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7190 3
71 NGC 4494 GiP 12 31 24.0391348536 +25 46 30.071664120   10.55 9.74     ~ 474 0
72 M 89 LIN 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 995 2
73 NGC 4564 GiG 12 36 26.9869512504 +11 26 21.204472848 12.51 12.05 11.12     ~ 595 1
74 NGC 4589 LIN 12 37 24.9875 +74 11 30.903   12.0       ~ 285 1
75 NGC 4648 GiG 12 41 44.3891511144 +74 25 15.700353240   12.6       ~ 117 0
76 M 59 GiG 12 42 02.2581375168 +11 38 48.909507756   11.0       ~ 693 0
77 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1117 1
78 M 60 GiP 12 43 39.9680 +11 33 09.696   10.3       ~ 1348 1
79 NGC 4645 GiG 12 44 10.0048812288 -41 44 59.895170736   12.82 11.68 11.76   ~ 81 0
80 NGC 4660 GiP 12 44 31.9814021280 +11 11 25.739106972   12.1       ~ 417 0
81 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 859 0
82 NGC 4696 BiC 12 48 49.2724775784 -41 18 39.304053252   11.21   10.7   ~ 490 3
83 NGC 4729 GiG 12 51 46.2922103760 -41 07 56.089689600   13.49   11.82   ~ 57 1
84 NGC 4767 GiG 12 53 52.9471545720 -39 42 51.419007360   12.62 11.53 10.90   ~ 88 0
85 NGC 4976 GiG 13 08 37.526 -49 30 23.07   11.05 10.20     ~ 103 1
86 NGC 5017 GiG 13 12 54.5176056816 -16 45 56.864317068   13.2   12.49   ~ 68 0
87 NGC 5018 GiP 13 13 01.0452720960 -19 31 05.649751992   11.71   10.31   ~ 313 1
88 NGC 5044 BiC 13 15 23.9607836592 -16 23 07.547751744   11.9   10.74   ~ 501 0
89 NGC 5061 Sy2 13 18 05.054 -26 50 14.00   11.18 10.41 9.66 13.59 ~ 175 0
90 NGC 5077 AGN 13 19 31.66962921 -12 39 25.0765176   13.87 12.85 11.30   ~ 295 0
91 NGC 5198 GiP 13 30 11.3858465016 +46 40 14.667297420   13.2       ~ 177 0
92 NGC 5322 SyG 13 49 15.24 +60 11 25.8   11.3       ~ 415 2
93 NGC 5557 GiG 14 18 25.708 +36 29 37.28   12.2       ~ 222 0
94 NGC 5576 GiP 14 21 03.691 +03 16 15.78 12.25 11.85 10.96     ~ 329 1
95 NGC 5638 GiP 14 29 40.3717451400 +03 13 59.987811648 12.57 12.14 11.20     ~ 243 2
96 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 637 1
97 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 294 0
98 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 849 1
99 NGC 5898 EmG 15 18 13.5683042256 -24 05 52.428845076   12.37 11.52 10.71   ~ 153 1
100 NGC 5903 GiG 15 18 36.529 -24 04 06.94   12.11 11.48 10.73   ~ 141 1
101 NGC 5982 LIN 15 38 39.778 +59 21 21.21   12.4       ~ 293 0
102 NGC 6411 AG? 17 35 32.8446342384 +60 48 48.236693796   13.2       ~ 113 0
103 NGC 6758 GiG 19 13 52.3655323032 -56 18 36.095195484   12.53 11.56 10.83   ~ 82 0
104 NGC 6851 EmG 20 03 34.3587786984 -48 17 04.350059196   12.83 11.67 11.31   ~ 95 0
105 NGC 6868 Sy2 20 09 54.082 -48 22 46.25   11.58 9.22 10.01 7.91 ~ 226 1
106 NGC 6876 GiG 20 18 19.146 -70 51 31.80   11.76 11.54 10.45   ~ 129 0
107 NGC 6909 AG? 20 27 38.9325072768 -47 01 37.164117144   12.76 11.88 11.52   ~ 108 0
108 NGC 7097 EmG 21 40 12.9231946008 -42 32 21.879559932   12.66 11.71 11.21   ~ 119 0
109 NGC 7144 GiG 21 52 42.4890937656 -48 15 13.729791132   11.87 10.71 10.39   ~ 152 1
110 NGC 7145 GiG 21 53 20.237 -47 52 56.96   12.13 11.23 10.77   ~ 117 0
111 NGC 7391 EmG 22 50 36.1354224576 -01 32 41.420188356   13.7       ~ 65 0
112 IC 1459 AGN 22 57 10.60682195 -36 27 43.9966421   10.96 11.85 9.34 10.3 ~ 624 2
113 NGC 7454 GiG 23 01 06.5120307216 +16 23 18.484008792   13.6       ~ 147 0
114 NGC 7507 GiG 23 12 07.595 -28 32 22.70   11.60   9.98   ~ 179 0
115 NGC 7562 GiP 23 15 57.4982037648 +06 41 15.227839176   13.0       ~ 166 0
116 NGC 7619 GiG 23 20 14.524 +08 12 22.63   12.7       ~ 449 0
117 NGC 7626 rG 23 20 42.524 +08 13 01.43   12.8       ~ 426 1
118 NGC 7785 AG? 23 55 19.0388560224 +05 54 56.735224164   13.00       ~ 175 0

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