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Query : 2000MNRAS.315..184K |
2000MNRAS.315..184K - Mon. Not. R. Astron. Soc., 315, 184-208 (2000/June-2)
The stellar populations of early-type galaxies in the Fornax cluster.
KUNTSCHNER H.
Abstract (from CDS):
Galaxies with old stellar populations show tight scaling relations between metal-line indices and the central velocity dispersion. Remarkably also, the Fe lines are well correlated with σ0. Our detailed analysis of the stellar populations suggests that these scaling relations are driven mostly by metallicity. Galaxies with a young stellar component do generally deviate from the main relation. In particular, the lower luminosity S0s show a large spread.
Our conclusions are based on several age/metallicity diagnostic diagrams in the Lick/IDS system comprising established indices such as Mg2 and Hβ as well as new and more sensitive indices such as HγA and Fe3, a combination of three prominent Fe lines. The inferred difference in the age distribution between lenticular and elliptical galaxies is a robust conclusion, as the models generate consistent relative ages using different age and metallicity indicators, even though the absolute ages remain uncertain. The absolute age uncertainty is mainly caused by the effects of non-solar abundance ratios which are not yet accounted for by the stellar population models. Furthermore, we find that elliptical galaxies and the bulge of one bright S0 are overabundant in magnesium, where the most luminous galaxies show the strongest overabundances. The stellar populations of young and faint S0s are consistent with solar abundance ratios or a weak Mg underabundance. Two of the faintest lenticular galaxies in our sample have blue continua and extremely strong Balmer-line absorption, suggesting star formation <2Gyr ago.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): galaxies: abundances - galaxies: clusters: individual: Fornax - galaxies: elliptical and lenticular, cD - galaxies: formation - galaxies: kinematics and dynamics
Simbad objects: 41
Number of rows : 41 |
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 | * del Psc | PM* | 00 48 40.9443145328 | +07 35 06.294902124 | 7.83 | 5.95 | 4.44 | 3.27 | 2.40 | K5-III | 187 | 0 |
2 | NGC 1316 | BL? | 03 22 41.789 | -37 12 29.52 | 9.81 | 9.15 | 8.53 | 7.66 | ~ | 1387 | 1 | |
3 | NGC 1336 | GiG | 03 26 32.1845365512 | -35 42 48.662672184 | 13.12 | 11.95 | ~ | 135 | 0 | |||
4 | ESO 358-6 | GiG | 03 27 18.0282957096 | -34 31 35.315736492 | 14.15 | 12.95 | ~ | 93 | 0 | |||
5 | NGC 1339 | EmG | 03 28 06.5493649512 | -32 17 09.840527844 | 12.63 | 11.18 | ~ | 163 | 0 | |||
6 | NGC 1351 | GiG | 03 30 34.9598617824 | -34 51 14.242996620 | 12.30 | 10.85 | ~ | 181 | 0 | |||
7 | NGC 1373 | GiP | 03 34 59.1993515280 | -35 10 15.879086760 | 14.44 | 14.03 | 13.26 | ~ | 129 | 1 | ||
8 | NGC 1374 | EmG | 03 35 16.5885737352 | -35 13 34.563417168 | 12.46 | 11.97 | 11.08 | 10.59 | ~ | 297 | 1 | |
9 | NGC 1375 | GiG | 03 35 16.8025873104 | -35 15 56.371399740 | 13.50 | 13.02 | 12.40 | 11.74 | ~ | 165 | 1 | |
10 | IC 1963 | GiG | 03 35 31.0692175536 | -34 26 49.368859656 | 12.90 | 11.71 | ~ | 135 | 0 | |||
11 | ESO 358-25 | EmG | 03 35 33.134 | -32 27 53.55 | 13.90 | ~ | 83 | 0 | ||||
12 | NGC 1379 | GiP | 03 36 03.9668625792 | -35 26 28.547476800 | 12.17 | 12.04 | 10.91 | 10.60 | ~ | 265 | 1 | |
13 | NGC 1380 | Sy2 | 03 36 27.590 | -34 58 34.68 | 11.32 | 10.94 | 9.93 | 9.37 | ~ | 429 | 1 | |
14 | NGC 1381 | GiP | 03 36 31.6592184144 | -35 17 42.739221912 | 12.90 | 12.47 | 11.50 | 11.02 | ~ | 254 | 1 | |
15 | ESO 358-33 | GiG | 03 36 47.5007323848 | -34 44 22.739259552 | 13.63 | 13.36 | 12.41 | 12.00 | ~ | 143 | 1 | |
16 | NGC 1399 | BiC | 03 38 29.083 | -35 27 02.67 | 11.05 | 9.74 | 9.59 | 8.12 | ~ | 1570 | 1 | |
17 | ACO S 373 | ClG | 03 38 29.4 | -35 27 08 | ~ | 1827 | 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 1419 | GiG | 03 40 42.1036600944 | -37 30 38.778564456 | 13.56 | 12.07 | ~ | 138 | 0 | |||
20 | ESO 358-50 | GiG | 03 41 03.6078361560 | -33 46 45.297655572 | 13.86 | 12.57 | ~ | 88 | 0 | |||
21 | NGC 1427 | GiG | 03 42 19.4455150392 | -35 23 33.169251120 | 11.89 | 10.44 | ~ | 281 | 0 | |||
22 | NGC 1428 | GiG | 03 42 22.73 | -35 09 14.4 | 13.77 | 12.49 | ~ | 112 | 0 | |||
23 | ESO 358-59 | GiG | 03 45 03.5753235792 | -35 58 21.372259872 | 14.08 | 12.85 | ~ | 121 | 0 | |||
24 | ESO 359-2 | GiG | 03 50 36.7310457912 | -35 54 34.013712996 | 14.48 | 13.49 | ~ | 83 | 0 | |||
25 | IC 2006 | EmG | 03 54 28.4628183240 | -35 58 01.673622516 | 12.39 | 10.94 | 11.9 | ~ | 207 | 0 | ||
26 | * phi02 Ori | PM* | 05 36 54.3885728561 | +09 17 26.416510827 | 5.70 | 5.04 | 4.09 | 3.33 | 2.78 | G9.5IIIbFe-2.5 | 359 | 0 |
27 | HD 40657 | PM* | 06 00 03.3496339392 | -03 04 27.330496968 | 6.95 | 5.74 | 4.52 | 3.59 | 2.92 | K1.5III-IIIbCN-1 | 73 | 0 |
28 | * nu.02 CMa | PM* | 06 36 41.0376788353 | -19 15 21.169452656 | 5.96 | 5.011 | 3.91 | 3.13 | 2.61 | K1.5III-IVFe1 | 260 | 1 |
29 | * 20 Mon | PM* | 07 10 13.6815026472 | -04 14 13.585055244 | 6.73 | 5.95 | 4.92 | 4.13 | 3.61 | K0III | 148 | 0 |
30 | * gam CMi | SB* | 07 28 09.7942869528 | +08 55 31.888128216 | 7.26 | 5.73 | 4.30 | 3.19 | 2.40 | K3-IIIFe-0.5 | 103 | 0 |
31 | LAWD 25 | WD* | 07 40 20.7886676070 | -17 24 49.156867583 | 13.36 | 13.061 | 12.886 | 12.70 | DZQA6 | 203 | 0 | |
32 | * alf Mon | PM* | 07 41 14.8319734511 | -09 33 04.077766984 | 5.83 | 4.95 | 3.93 | 3.16 | 2.64 | G9.5III-IIIbFe-0.5 | 201 | 0 |
33 | * G CMi | PM* | 08 02 15.9369212008 | +02 20 04.458846354 | 6.91 | 5.63 | 4.38 | 3.39 | 2.72 | K2IIIbFe-0.5: | 188 | 1 |
34 | HD 71597 | * | 08 28 14.5570296048 | +00 14 38.190835356 | 8.47 | 7.29 | K1IV | 48 | 0 | |||
35 | * iot Hya | PM* | 09 39 51.3614722468 | -01 08 34.118633450 | 6.68 | 5.23 | 3.91 | 2.92 | 2.25 | K2.5III | 179 | 0 |
36 | GD 108 | HS* | 10 00 47.2462375824 | -07 33 30.773994012 | 12.406 | 13.349 | 13.563 | 13.662 | 13.781 | sdB | 144 | 1 |
37 | * lam Hya | SB* | 10 10 35.2885811545 | -12 21 14.858923765 | 5.53 | 4.61 | 3.61 | 2.84 | 2.36 | K0IIIbCN0.5 | 205 | 0 |
38 | M 105 | LIN | 10 47 49.600 | +12 34 53.87 | 10.56 | 9.76 | 9.12 | 8.18 | ~ | 1463 | 0 | |
39 | * alf Crt | PM* | 10 59 46.4651557828 | -18 17 55.630394216 | 6.14 | 5.16 | 4.07 | 3.27 | 2.72 | K0IIIb | 215 | 0 |
40 | * psi01 Aqr | PM* | 23 15 53.4940495770 | -09 05 15.844964053 | 6.37 | 5.36 | 4.25 | 3.46 | 2.90 | K1-IIIFe-0.5 | 244 | 1 |
41 | HD 221148 | PM* | 23 29 32.0817754272 | -04 31 57.892874556 | 7.34 | 6.25 | K3-IIIbFe2 | 140 | 0 |
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