2012ApJ...746...14M

Query : 2012ApJ...746...14M

2012ApJ...746...14M - Astrophys. J., 746, 14 (2012/February-2)

The C+N+O abundance of ω Centauri giant stars: implications for the chemical-enrichment scenario and the relative ages of different stellar populations.

MARINO A.F., MILONE A.P., PIOTTO G., CASSISI S., D'ANTONA F., ANDERSON J., APARICIO A., BEDIN L.R., RENZINI A. and VILLANOVA S.

Abstract (from CDS):

We present a chemical-composition analysis of 77 red-giant stars in Omega Centauri. We have measured abundances for carbon and nitrogen, and combined our results with abundances of O, Na, La, and Fe that we determined in our previous work. Our aim is to better understand the peculiar chemical-enrichment history of this cluster by studying how the total C+N+O content varies among the different metallicity stellar groups, and among stars at different places along the Na-O anticorrelation. We find that the (anti)correlations among the light elements that would be expected on theoretical grounds for matter that has been nuclearly processed via high-temperature proton captures. The overall [(C+N+O)/Fe] increases by ∼0.5 dex from [Fe/H] ~-2.0 to [Fe/H] ~-0.9. Our results provide insight into the chemical-enrichment history of the cluster, and the measured CNO variations provide important corrections for estimating the relative ages of the different stellar populations.

Abstract Copyright: ∼

Journal keyword(s): globular clusters: individual: NGC 5139 - stars: abundances - stars: Population II

Simbad objects: 85

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Number of rows : 85
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 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
3 NGC 5139 584 RG* 13 26 18.330 -47 26 25.74   14.371 13.220   12.060 ~ 11 0
4 Cl* NGC 5139 WFI 249670 RG* 13 26 22.4993627736 -47 24 37.787658048   14.698 13.834   12.661 ~ 7 0
5 2MASS J13262508-4729001 RG* 13 26 25.0801269552 -47 29 00.195988200   13.301 11.997   10.679 ~ 10 0
6 2MASS J13262628-4725199 RG* 13 26 26.2932907728 -47 25 19.986342636 14.99 13.430 11.979   10.592 ~ 14 0
7 Cl* NGC 5139 WFI 229207 RG* 13 26 26.8214597760 -47 29 17.907995076   14.443 13.386   12.144 ~ 3 0
8 2MASS J13262727-4728306 RG* 13 26 27.2824502784 -47 28 30.718175772   13.423 12.192   10.838 ~ 7 0
9 2MASS J13262845-4733184 RG* 13 26 28.4479310736 -47 33 18.519944976   13.340 11.941   10.667 ~ 12 0
10 2MASS J13262926-4724426 RG* 13 26 29.2725463272 -47 24 42.606230148   13.351 11.937   10.605 ~ 13 0
11 Cl* NGC 5139 WFI 239549 RG* 13 26 29.575 -47 26 55.53   14.382 13.423   12.186 ~ 3 0
12 NGC 5139 436 RG* 13 26 30.8205584616 -47 24 51.999657660   13.942 12.774   11.548 ~ 15 0
13 NGC 5139 5108 RG* 13 26 31.3855256400 -47 24 19.041386868   14.253 13.197   12.032 ~ 12 0
14 2MASS J13263176-4726384 RG* 13 26 31.766 -47 26 38.40   14.306 13.256   12.077 ~ 4 0
15 2MASS J13263286-4732191 RG* 13 26 32.8747299360 -47 32 19.100955660   13.762 12.317   10.948 ~ 19 0
16 2MASS J13263349-4726570 RG* 13 26 33.5076014304 -47 26 57.091766640   13.731 12.472   11.082 ~ 6 0
17 2MASS J13263357-4727330 RG* 13 26 33.5810213400 -47 27 32.952187512   13.465 12.105   10.714 ~ 10 0
18 2MASS J13263549-4726387 RG* 13 26 35.4993121512 -47 26 38.742259884   14.083 12.942   11.674 ~ 4 0
19 2MASS J13263572-4730232 RG* 13 26 35.7437789016 -47 30 23.250999492 15.12 13.370 11.865   10.521 ~ 8 0
20 NGC 5139 4807 RG* 13 26 35.7552462792 -47 25 24.371030172   14.638 13.647   12.562 ~ 11 0
21 2MASS J13263600-4726303 RG* 13 26 36.0090086640 -47 26 30.297993756 14.59 13.340 12.030   10.550 ~ 13 0
22 2MASS J13263611-4730532 RG* 13 26 36.1272914136 -47 30 53.281470600   13.602 12.357   10.876 ~ 8 0
23 Cl* NGC 5139 LEID 52096 RG* 13 26 36.7329253056 -47 32 55.608819684   14.674 13.653   12.477 ~ 6 0
24 2MASS J13263672-4730227 RG* 13 26 36.7399954560 -47 30 22.834183500   14.129 13.142   11.917 ~ 9 0
25 2MASS J13263700-4727259 RG* 13 26 37.0229167392 -47 27 25.828956432   14.007 12.890   11.611 ~ 8 0
26 2MASS J13263716-4732264 RG* 13 26 37.1759010336 -47 32 26.426951952 14.27 13.460 12.329   11.122 ~ 13 0
27 2MASS J13263724-4728311 RG* 13 26 37.2506022696 -47 28 31.086323832   13.222 11.875   10.489 ~ 8 0
28 NGC 5139 4813 RG* 13 26 37.3109927688 -47 25 22.235602188   14.648 13.618   12.536 ~ 11 0
29 2MASS J13263768-4725388 RG* 13 26 37.6864539576 -47 25 38.889081552   13.895 12.858   11.586 ~ 11 0
30 2MASS J13263843-4729296 RG* 13 26 38.4328167912 -47 29 29.668484112   14.424 13.299   12.054 ~ 4 0
31 2MASS J13263888-4729021 RG* 13 26 38.8932926328 -47 29 02.130510768   13.550 12.085   10.714 ~ 5 0
32 NGC 5139 343 RG* 13 26 38.944 -47 25 29.89   13.978 12.872   11.737 ~ 12 0
33 2MASS J13263897-4726468 RG* 13 26 38.9900159928 -47 26 46.790963160   13.469 12.284   10.908 ~ 6 0
34 2MASS J13263943-4730471 RG* 13 26 39.4358037624 -47 30 47.156789304   14.392 13.17   11.963 ~ 7 0
35 2MASS J13263958-4727367 RG* 13 26 39.59 -47 27 36.7   14.965 13.771   12.421 ~ 5 0
36 2MASS J13264098-4730522 RG* 13 26 40.9984405896 -47 30 52.246408896   13.909 12.641   11.381 ~ 8 0
37 2MASS J13264114-4731441 RG* 13 26 41.1438857472 -47 31 44.203593900   13.845 12.398   11.088 ~ 7 0
38 2MASS J13264139-4730127 RG* 13 26 41.4095183568 -47 30 12.823060572 14.50 13.440 12.310   10.766 ~ 11 0
39 2MASS J13264519-4729455 RG* 13 26 45.2095761816 -47 29 45.519493164   13.619 12.488   10.984 ~ 7 0
40 2MASS J13264599-4726345 RG* 13 26 46.0049074728 -47 26 34.581457356   13.870 12.561   11.228 ~ 6 0
41 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
42 NGC 5139 152 RG* 13 26 48.1913201496 -47 29 59.080269660   13.459 12.18   10.658 ~ 7 0
43 2MASS J13264834-4725245 RG* 13 26 48.3567270648 -47 25 24.520515492   14.256 13.164   11.883 ~ 5 0
44 2MASS J13264862-4731549 RG* 13 26 48.622 -47 31 54.96   15.692 14.787   11.847 ~ 6 0
45 2MASS J13264887-4727282 RG* 13 26 48.8826527328 -47 27 28.166703624   14.782 13.568   12.152 ~ 5 0
46 2MASS J13264905-4726552 RG* 13 26 49.058 -47 26 55.27   13.737 12.483   11.212 ~ 8 0
47 2MASS J13264907-4727423 RG* 13 26 49.0788720960 -47 27 42.261569316   13.620 12.508   11.203 ~ 7 0
48 Cl* NGC 5139 L 1821 RG* 13 26 49.6397905632 -47 25 15.649640904   14.980 13.716   12.490 ~ 6 0
49 2MASS J13264968-4725315 RG* 13 26 49.6980527064 -47 25 31.544122188 14.31 12.990 11.647   10.438 ~ 8 0
50 Cl* NGC 5139 WFI 241561 RG* 13 26 50.7051573240 -47 26 27.123220644   14.654 13.779   12.554 ~ 3 0
51 2MASS J13265076-4733038 RG* 13 26 50.7729103008 -47 33 03.857447520   13.83 12.31   11.037 ~ 21 0
52 2MASS J13265132-4731190 RG* 13 26 51.3262890672 -47 31 19.006466304 14.98 13.490 12.022   10.627 ~ 12 0
53 2MASS J13265353-4731582 RG* 13 26 53.5348359192 -47 31 58.283487660   13.475 11.906   10.472 ~ 12 0
54 Cl* NGC 5139 WFI 230070 RG* 13 26 54.010 -47 29 05.63   14.253 13.136   11.904 ~ 4 0
55 2MASS J13265466-4732035 RG* 13 26 54.6780783720 -47 32 03.616194228   14.172 12.984   11.856 ~ 7 0
56 2MASS J13265472-4726285 RG* 13 26 54.7206285792 -47 26 28.608274572   13.467 12.065   10.742 ~ 3 0
57 2MASS J13265489-4730149 RG* 13 26 54.9006164784 -47 30 14.927042988   13.479 12.283   11.021 ~ 8 0
58 2MASS J13265531-4725438 RG* 13 26 55.3173946968 -47 25 43.887090288 15.35 13.660 12.107   10.730 ~ 13 0
59 Cl* NGC 5139 WFI 230804 RG* 13 26 56.0439604560 -47 28 55.248349404   14.532 13.418   12.098 ~ 5 0
60 2MASS J13265696-4731433 RG* 13 26 56.9795311824 -47 31 43.407062904   13.644 12.421   11.176 ~ 6 0
61 2MASS J13265743-4729349 RG* 13 26 57.4477702008 -47 29 35.000190024   13.447 12.241   10.863 ~ 8 0
62 2MASS J13265907-4729498 RG* 13 26 59.0794501896 -47 29 49.926330060   13.629 12.434   10.995 ~ 8 0
63 2MASS J13265920-4728403 RG* 13 26 59.2111540224 -47 28 40.382499252   14.085 12.856   11.442 ~ 9 0
64 NGC 5139 9040 RG* 13 26 59.6114131968 -47 27 01.099689408   13.854 12.73   11.377 ~ 8 0
65 2MASS J13265996-4728333 RG* 13 26 59.9720135304 -47 28 33.462669036   13.570 12.316   10.698 ~ 6 0
66 2MASS J13270028-4727409 RG* 13 27 00.2945188512 -47 27 40.978830060   14.060 12.808   11.299 ~ 8 0
67 Cl* NGC 5139 WFI 234159 RG* 13 27 00.3230871072 -47 28 08.658275052   14.750 13.626   12.245 ~ 4 0
68 2MASS J13270032-4732040 RG* 13 27 00.3367137768 -47 32 04.099046208   13.891 12.670   11.429 ~ 6 0
69 Cl* NGC 5139 LEID 40359 RG* 13 27 00.5427513120 -47 27 29.775912552   14.221 12.81   11.850 ~ 6 0
70 2MASS J13270114-4730063 RG* 13 27 01.1562887592 -47 30 06.434196660   13.580 12.291   10.859 ~ 9 0
71 NGC 5139 467 RG* 13 27 01.1653735224 -47 24 40.277507148   13.912 12.760   11.464 ~ 13 0
72 2MASS J13270119-4732325 RG* 13 27 01.2022578936 -47 32 32.604489060   14.842 13.507   12.166 ~ 8 0
73 2MASS J13270340-4727383 RG* 13 27 03.4144040736 -47 27 38.392357032   13.603 12.324   10.853 ~ 9 0
74 2MASS J13270355-4726389 RG* 13 27 03.5659261896 -47 26 38.919545304   13.629 12.283   11.026 ~ 10 0
75 2MASS J13270471-4725276 RG* 13 27 04.7216043624 -47 25 27.711897096   13.672 12.499   11.227 ~ 10 0
76 2MASS J13270485-4726107 RG* 13 27 04.8653677920 -47 26 10.796359200 14.36 13.170 11.761   10.384 ~ 13 0
77 Cl* NGC 5139 LEID 33139 RG* 13 27 06.9223203000 -47 24 23.407434468   14.880 13.645   12.289 ~ 14 0
78 Cl* NGC 5139 L 3238 RG* 13 27 08.8302565752 -47 30 21.979327500   14.269 13.216   12.101 ~ 6 0
79 2MASS J13271378-4729405 RG* 13 27 13.7883633072 -47 29 40.466977944   14.149 12.962   11.699 ~ 11 0
80 2MASS J13271417-4730390 RG* 13 27 14.1819764904 -47 30 38.993314104   13.573 12.286   10.994 ~ 12 0
81 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
82 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
83 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
84 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1164 0
85 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0

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