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Query : 2000AJ....120..165T |
2000AJ....120..165T - Astron. J., 120, 165-188 (2000/July-0)
The stellar population histories of early-type galaxies. II. Controlling parameters of the stellar populations.
TRAGER S.C., FABER S.M., WORTHEY G. and GONZALEZ J.J.
Abstract (from CDS):
Although SSP parameters are heavily weighted by young stars, modeling them still places tight constraints on the total star formation history of elliptical galaxies. The relation between [E/Fe] and σ is consistent with a higher effective yield of Type II SNe elements at higher σ. This might occur if the IMF is enhanced in massive stars at high σ, or if more SNe II-enriched gas is retained by deeper galactic potential wells. Either way, modulating Type II yields versus σ seems to fit the data better than modulating Type Ia yields. The Z-plane is harder to explain and may be a powerful clue to star formation in elliptical galaxies if it proves to be general. Present data favor a ``frosting'' model in which low apparent SSP ages are produced by adding a small frosting of younger stars to an older ``base'' population (assuming no change in σ). If the frosting abundances are close to or slightly greater than the base population, simple two-component models run along lines of constant σ in the Z-plane, as required. This favors star formation from well-mixed pre-enriched gas rather than unmixed low-metallicity gas from an accreted object.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Abundances - Galaxies: Elliptical and Lenticular, cD - Galaxies: Evolution - Galaxies: Formation - Galaxies: Stellar Content
Simbad objects: 56
Number of rows : 56 |
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 | M 32 | GiG | 00 42 41.82480 | +40 51 54.6120 | 9.51 | 9.03 | 8.08 | ~ | 2154 | 2 | ||
2 | M 31 | AGN | 00 42 44.330 | +41 16 07.50 | 4.86 | 4.36 | 3.44 | ~ | 12646 | 1 | ||
3 | NGC 315 | LIN | 00 57 48.88334410 | +30 21 08.8119345 | 12.80 | 12.20 | 11.16 | 11.26 | ~ | 787 | 2 | |
4 | NGC 507 | BiC | 01 23 39.950 | +33 15 22.22 | 13.0 | ~ | 440 | 3 | ||||
5 | NGC 547 | AGN | 01 26 00.6208982520 | -01 20 42.432452268 | 13.16 | 13.34 | ~ | 349 | 4 | |||
6 | ACO 194 | ClG | 01 26 01.3 | -01 22 02 | ~ | 350 | 2 | |||||
7 | NGC 584 | Sy2 | 01 31 20.7231919800 | -06 52 04.770287472 | 11.93 | 11.44 | 10.48 | ~ | 402 | 2 | ||
8 | NGC 636 | EmG | 01 39 06.5293238064 | -07 30 45.475975296 | 12.5 | ~ | 190 | 0 | ||||
9 | 2E 0150.5-1358 | ClG | 01 53 00.40 | -13 44 18.0 | ~ | 387 | 0 | |||||
10 | NGC 720 | Sy1 | 01 53 00.523 | -13 44 19.25 | 12.4 | 10.36 | ~ | 522 | 0 | |||
11 | NGC 821 | AG? | 02 08 21.1358498040 | +10 59 41.832436704 | 12.210 | 11.310 | 10.739 | 9.744 | ~ | 572 | 0 | |
12 | NGC 1336 | GiG | 03 26 32.1845365512 | -35 42 48.662672184 | 13.12 | 11.95 | ~ | 135 | 0 | |||
13 | NGC 1339 | EmG | 03 28 06.5493649512 | -32 17 09.840527844 | 12.63 | 11.18 | ~ | 163 | 0 | |||
14 | NGC 1351 | GiG | 03 30 34.9598617824 | -34 51 14.242996620 | 12.30 | 10.85 | ~ | 181 | 0 | |||
15 | NGC 1373 | GiP | 03 34 59.1993515280 | -35 10 15.879086760 | 14.44 | 14.03 | 13.26 | ~ | 129 | 1 | ||
16 | NGC 1374 | EmG | 03 35 16.5885737352 | -35 13 34.563417168 | 12.46 | 11.97 | 11.08 | 10.59 | ~ | 297 | 1 | |
17 | NGC 1379 | GiP | 03 36 03.9668625792 | -35 26 28.547476800 | 12.17 | 12.04 | 10.91 | 10.60 | ~ | 265 | 1 | |
18 | NGC 1399 | BiC | 03 38 29.083 | -35 27 02.67 | 11.05 | 9.74 | 9.59 | 8.12 | ~ | 1570 | 1 | |
19 | ACO S 373 | ClG | 03 38 29.4 | -35 27 08 | ~ | 1827 | 0 | |||||
20 | NGC 1404 | GiP | 03 38 51.917 | -35 35 39.81 | 11.53 | 10.69 | 10.00 | 9.03 | ~ | 751 | 1 | |
21 | NGC 1419 | GiG | 03 40 42.1036600944 | -37 30 38.778564456 | 13.56 | 12.07 | ~ | 138 | 0 | |||
22 | NGC 1427 | GiG | 03 42 19.4455150392 | -35 23 33.169251120 | 11.89 | 10.44 | ~ | 281 | 0 | |||
23 | NGC 1453 | EmG | 03 46 27.2307890592 | -03 58 07.831476768 | 13 | 11.30 | ~ | 180 | 0 | |||
24 | IC 2006 | EmG | 03 54 28.4628183240 | -35 58 01.673622516 | 12.39 | 10.94 | 11.9 | ~ | 207 | 0 | ||
25 | NGC 1600 | GiG | 04 31 39.858 | -05 05 09.97 | 8.9 | 10.81 | ~ | 381 | 0 | |||
26 | NGC 1700 | EmG | 04 56 56.3160873072 | -04 51 56.794713228 | 12 | 11.14 | ~ | 348 | 1 | |||
27 | NGC 2300 | AG? | 07 32 20.486 | +85 42 31.90 | 12.2 | ~ | 335 | 0 | ||||
28 | NGC 2778 | GiP | 09 12 24.3741783168 | +35 01 39.140496840 | 13.1 | ~ | 287 | 0 | ||||
29 | NGC 3377 | GiP | 10 47 42.400 | +13 59 08.30 | 11.55 | 11.24 | 10.38 | ~ | 775 | 1 | ||
30 | M 105 | LIN | 10 47 49.600 | +12 34 53.87 | 10.56 | 9.76 | 9.12 | 8.18 | ~ | 1463 | 0 | |
31 | NGC 3608 | LIN | 11 16 58.967 | +18 08 54.71 | 11.7 | ~ | 508 | 0 | ||||
32 | NGC 3818 | EmG | 11 41 57.3563891040 | -06 09 20.459153376 | 13 | 11.78 | ~ | 178 | 0 | |||
33 | NGC 4261 | LIN | 12 19 23.2160630 | +05 49 29.700024 | 13.92 | 12.87 | ~ | 1223 | 0 | |||
34 | NGC 4278 | LIN | 12 20 06.8242 | +29 16 50.722 | 11.54 | 11.09 | 10.16 | ~ | 946 | 2 | ||
35 | M 84 | Sy2 | 12 25 03.74333 | +12 53 13.1393 | 12.67 | 12.09 | 10.49 | ~ | 1762 | 2 | ||
36 | NAME Virgo Cluster | ClG | 12 26 32.1 | +12 43 24 | ~ | 6644 | 0 | |||||
37 | M 49 | Sy2 | 12 29 46.8 | +08 00 01 | 13.21 | 12.17 | ~ | 2094 | 2 | |||
38 | NGC 4478 | GiP | 12 30 17.4160005576 | +12 19 42.790577160 | 12.82 | 12.36 | 11.45 | 10.17 | ~ | 490 | 1 | |
39 | NGC 4489 | GiG | 12 30 52.2472748976 | +16 45 31.866359004 | 13.2 | ~ | 252 | 0 | ||||
40 | M 89 | LIN | 12 35 39.80733343 | +12 33 22.8308657 | 11.29 | 10.73 | 9.75 | ~ | 995 | 2 | ||
41 | M 60 | GiP | 12 43 39.9680 | +11 33 09.696 | 10.3 | ~ | 1348 | 1 | ||||
42 | NGC 4697 | GiG | 12 48 35.8981498824 | -05 48 02.482374564 | 10.97 | 9.83 | ~ | 859 | 0 | |||
43 | NGC 5638 | GiP | 14 29 40.3717451400 | +03 13 59.987811648 | 12.57 | 12.14 | 11.20 | ~ | 243 | 2 | ||
44 | NGC 5812 | EmG | 15 00 55.708 | -07 27 26.33 | 12 | 11.19 | ~ | 159 | 0 | |||
45 | NGC 5813 | LIN | 15 01 11.2302420864 | +01 42 07.141569696 | 12.00 | 11.45 | 10.46 | 10.06 | ~ | 637 | 1 | |
46 | NGC 5831 | GiG | 15 04 07.0002600408 | +01 13 11.705607012 | 13.1 | 11.19 | ~ | 294 | 0 | |||
47 | NGC 5846 | BiC | 15 06 29.253 | +01 36 20.29 | 11.9 | 9.74 | ~ | 850 | 1 | |||
48 | NGC 6125 | AG? | 16 19 11.5344941208 | +57 59 02.863041504 | 13.0 | ~ | 101 | 0 | ||||
49 | NGC 6702 | AG? | 18 46 57.5835209136 | +45 42 20.305242180 | 15.30 | 14.73 | 13.05 | ~ | 142 | 0 | ||
50 | NGC 6703 | AG? | 18 47 18.8166660360 | +45 33 02.274865812 | 12.29 | 11.34 | ~ | 217 | 0 | |||
51 | NGC 7052 | rG | 21 18 33.0441963648 | +26 26 49.174586196 | 15.52 | 14.85 | 13.09 | ~ | 323 | 1 | ||
52 | NGC 7454 | GiG | 23 01 06.5120307216 | +16 23 18.484008792 | 13.6 | ~ | 147 | 0 | ||||
53 | NGC 7562 | GiP | 23 15 57.4982037648 | +06 41 15.227839176 | 13.0 | ~ | 166 | 0 | ||||
54 | NGC 7619 | GiG | 23 20 14.524 | +08 12 22.63 | 12.7 | ~ | 449 | 0 | ||||
55 | NGC 7626 | rG | 23 20 42.524 | +08 13 01.43 | 12.8 | ~ | 426 | 1 | ||||
56 | NGC 7785 | AG? | 23 55 19.0388560224 | +05 54 56.735224164 | 13.00 | ~ | 175 | 0 |
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