2012ApJ...750L..14C

Query : 2012ApJ...750L..14C

2012ApJ...750L..14C - Astrophys. J., 750, L14 (2012/May-1)

Chemical tagging of three distinct populations of red giants in the globular cluster NGC 6752.

CARRETTA E., BRAGAGLIA A., GRATTON R.G., LUCATELLO S. and D'ORAZI V.

Abstract (from CDS):

We present aluminum, magnesium, and silicon abundances in the metal-poor globular cluster NGC 6752 for a sample of more than 130 red giants with homogeneous oxygen and sodium abundances. We find that [Al/Fe] shows a spread of about 1.4 dex among giants in NGC 6752 and is anticorrelated with [Mg/Fe] and [O/Fe] and correlated with [Na/Fe] and [Si/Fe]. These relations are not continuous in nature, but the distribution of stars is clearly clustered around three distinct Al values, low, intermediate, and high. These three groups nicely correspond to the three distinct sequences previously detected using Strömgren photometry along the red giant branch. These two independent findings strongly indicate the existence of three distinct stellar populations in NGC 6752. Comparing the abundances of O and Mg, we find that the population with intermediate chemical abundances cannot originate from material with the same composition of the most O- and Mg-poor population, diluted by material with that of the most O- and Mg-rich one. This calls for different polluters.

Abstract Copyright: ∼

Journal keyword(s): globular clusters: general - globular clusters: individual: NGC 6752 - stars: abundances - stars: evolution - stars: Population II

VizieR on-line data: <Available at CDS (J/ApJ/750/L14): table1.dat>

Simbad objects: 141

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Number of rows : 141
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 * 4 Cet V* 00 07 44.1111674208 -02 32 55.248548028 5.82 6.29 6.43     ApSi 93 0
2 HD 344 HB* 00 08 03.4868999832 -33 31 45.568976952   6.787 5.662     K1III 44 0
3 * bet Cas dS* 00 09 10.68518 +59 08 59.2120 2.73 2.61 2.27 1.97 1.77 F2III 551 0
4 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
5 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
6 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
7 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
8 Cl* NGC 6752 CS 106 RG* 19 09 52.1905787376 -59 57 43.889037480   14.426 13.621     ~ 16 0
9 Cl* NGC 6752 CBG 35726 RG* 19 09 54.0542786232 -59 59 25.880380692   14.433 13.603     ~ 12 0
10 Cl* NGC 6752 CS 107 RG* 19 09 54.3140920560 -59 57 34.259732748   13.384 12.348     ~ 14 0
11 Cl* NGC 6752 CBG 40120 RG* 19 09 56.3160871608 -59 51 27.664068708   13.856 12.946     ~ 9 0
12 2MASS J19095985-5955577 RG* 19 09 59.8638513552 -59 55 57.738234936   14.872 14.099     ~ 10 0
13 Cl* NGC 6752 CBG 38743 RG* 19 10 00.5883324480 -59 55 12.940347396   14.359 13.522     ~ 11 0
14 Cl* NGC 6752 CBG 39656 RG* 19 10 01.5125509704 -59 53 08.393466300   14.214 13.360     ~ 11 0
15 Cl* NGC 6752 CBG 38673 RG* 19 10 04.2589116936 -59 55 20.992735956   14.519 13.688     ~ 12 0
16 Cl* NGC 6752 CBG 36058 RG* 19 10 08.9693979408 -59 59 02.333211108   13.915 13.022     ~ 12 0
17 2MASS J19100924-6001058 RG* 19 10 09.2536186752 -60 01 05.899329768   15.290 14.533     ~ 8 0
18 Cl* NGC 6752 CBG 38291 RG* 19 10 09.4002069984 -59 56 04.511543280   13.907 12.991     ~ 9 0
19 2MASS J19100970-6001178 RG* 19 10 09.7157359392 -60 01 17.860240164   15.229 14.486     ~ 8 0
20 Cl* NGC 6752 CBG 46737 RG* 19 10 12.3625783368 -60 05 52.220972832   13.977 13.091     ~ 16 0
21 Cl* NGC 6752 CBG 32829 RG* 19 10 13.3755089112 -60 03 49.456076508   13.840 12.908     ~ 9 0
22 Cl* NGC 6752 BUON 4437 RG* 19 10 15.0801435576 -59 55 52.293005400   13.723 12.794     ~ 16 0
23 2MASS J19101583-5956304 RG* 19 10 15.8550400320 -59 56 30.390191124   14.147 13.273     ~ 9 0
24 Cl* NGC 6752 BUON 4216 RG* 19 10 19.5305698584 -60 00 30.156575040   14.520 13.698     ~ 17 0
25 Cl* NGC 6752 CBG 33818 RG* 19 10 20.4123153864 -60 01 56.524029708   14.092 13.225     ~ 12 0
26 2MASS J19102119-5959495 RG* 19 10 21.2033829096 -59 59 49.598244744   14.15 13.06     ~ 8 0
27 Cl* NGC 6752 CBG 36088 RG* 19 10 21.8083762320 -59 58 59.801928960   15.123 14.358     ~ 12 0
28 Cl* NGC 6752 CBG 32978 RG* 19 10 23.0583261408 -60 03 33.556383864   14.758 13.969     ~ 15 0
29 Cl* NGC 6752 CBG 46460 RG* 19 10 23.1666892440 -60 07 04.873507608   15.037 14.286     ~ 11 0
30 Cl* NGC 6752 CBG 46601 RG* 19 10 23.4735776712 -60 06 25.739592156   15.282 14.526     ~ 13 0
31 2MASS J19102534-5958092 RG* 19 10 25.3531627704 -59 58 09.283077948   15.182 14.436     ~ 10 0
32 NGC 6752 67 RG* 19 10 25.9459355640 -59 59 05.050889808   14.38 13.59     ~ 18 0
33 Cl* NGC 6752 CBG 17761 RG* 19 10 36.3086975880 -59 58 58.447510500   14.046 13.129     ~ 12 0
34 NGC 6752 57 RG* 19 10 36.4928689368 -59 56 07.703392560   14.62 14.00     ~ 18 0
35 Cl* NGC 6752 CBG 23086 RG* 19 10 36.6592187496 -59 57 39.763852992   14.911 14.118     ~ 12 0
36 2MASS J19103766-5959278 RG* 19 10 37.6525034424 -59 59 27.898399428   14.450 13.630     ~ 7 0
37 Cl* NGC 6752 CBG 30376 RG* 19 10 37.6959313296 -59 53 23.787926880   14.536 13.688     ~ 11 0
38 Cl* NGC 6752 CBG 14140 RG* 19 10 37.7160740972 -59 59 47.753080835   14.511 13.686 13.519   ~ 5 0
39 2MASS J19103790-5958372 RG* 19 10 37.9036584504 -59 58 37.325961084   13.872 12.964     ~ 5 0
40 2MASS J19103797-5957287 RG* 19 10 37.9634442192 -59 57 28.753430364   13.37 12.64     ~ 8 0
41 Cl* NGC 6752 CBG 29064 RG* 19 10 38.6610895440 -59 54 50.808945420   14.225 13.363     ~ 14 0
42 NGC 6752 62 RG* 19 10 39.0487357944 -59 57 50.469747264   14.35 13.27     ~ 12 0
43 2MASS J19104082-6000598 RG* 19 10 40.8402846936 -60 00 59.826263724   15.296 14.531     ~ 5 0
44 2MASS J19104100-5958224 RG* 19 10 40.9987352712 -59 58 22.466214444   14.584 13.746     ~ 5 0
45 Cl* NGC 6752 CBG 4602 RG* 19 10 41.2440068160 -60 04 36.746552676   14.597 13.778     ~ 14 0
46 NGC 6752 56 RG* 19 10 42.2963349864 -59 56 34.908109800   14.60 14.08     ~ 12 0
47 2MASS J19104255-5955059 RG* 19 10 42.5501463864 -59 55 05.967110388   14.953 14.165     ~ 8 0
48 2MASS J19104322-5958599 RG* 19 10 43.2079713648 -59 58 59.863573380   14.133 13.264     ~ 7 0
49 Cl* NGC 6752 CBG 14537 RG* 19 10 43.8200177558 -59 59 41.502972220   14.913 14.135     ~ 17 0
50 2MASS J19104387-5958326 RG* 19 10 43.8524783722 -59 58 32.783171646   15.148 14.398     ~ 5 0
51 2MASS J19104403-6000236 RG* 19 10 44.0488022208 -60 00 23.589764604   13.330 12.299     ~ 9 0
52 2MASS J19104435-5958396 RG* 19 10 44.3366558444 -59 58 39.715103752   15.140 14.383     ~ 10 0
53 2MASS J19104463-6002549 RG* 19 10 44.6435716560 -60 02 54.880164492   14.962 14.186     ~ 9 0
54 2MASS J19104470-6000431 RG* 19 10 44.7151677216 -60 00 43.053434424   14.956 14.197     ~ 7 0
55 2MASS J19104476-5952179 RG* 19 10 44.7572924472 -59 52 17.923861056   13.678 12.696     ~ 13 0
56 NGC 6752 55 RG* 19 10 46.1704717344 -59 56 26.704204764   13.40 12.24     ~ 19 0
57 2MASS J19104669-5958507 RG* 19 10 46.7052443016 -59 58 50.624521104   13.596 12.688     ~ 6 0
58 2MASS J19104745-6001057 RG* 19 10 47.457 -60 01 05.75   14.603 13.769     ~ 5 0
59 2MASS J19104746-5959279 RG* 19 10 47.4628724810 -59 59 28.035922825   13.603 12.654     ~ 8 0
60 Cl* NGC 6752 CBG 4787 RG* 19 10 47.7053318688 -60 04 22.963281744   14.535 13.693     ~ 8 1
61 Cl* NGC 6752 CBG 18231 RG* 19 10 47.7611447285 -59 58 52.433972214   15.199 14.483     ~ 8 0
62 2MASS J19104849-5958599 RG* 19 10 48.4976831822 -59 58 59.777771639   14.394 13.578     ~ 7 0
63 NGC 6752 5 RG* 19 10 48.6380923344 -60 01 55.414478928   14.402 13.743 13.633   ~ 18 0
64 Cl* NGC 6752 CBG 21694 RG* 19 10 48.9973964904 -59 58 03.247945650   14.527 13.696     ~ 11 0
65 2MASS J19104975-5959454 RG* 19 10 49.7773278096 -59 59 45.390286968   15.229 14.482     ~ 3 0
66 Cl* NGC 6752 BUON 2728 RG* 19 10 49.9412104080 -60 02 25.640269368   14.528 13.697     ~ 13 0
67 Cl* NGC 6752 CBG 13385 RG* 19 10 50.2048662648 -59 59 59.065495404   14.429 13.605     ~ 11 0
68 2MASS J19105022-5959273 RG* 19 10 50.2215571151 -59 59 27.233445641   15.098 14.337     ~ 9 0
69 2MASS J19105123-5957526 RG* 19 10 51.2539540176 -59 57 52.543083348   14.546 13.704     ~ 7 0
70 2MASS J19105170-5959200 RG* 19 10 51.702 -59 59 20.04   13.763 12.833     ~ 5 0
71 2MASS J19105196-6000045 RG* 19 10 51.9718990032 -60 00 04.489904232   14.107 13.225     ~ 6 0
72 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
73 Cl* NGC 6752 CBG 22948 RG* 19 10 52.3242731304 -59 57 42.345203580   14.513 13.682     ~ 11 0
74 2MASS J19105441-6000206 RG* 19 10 54.4242637296 -60 00 20.621840544   13.784 12.842     ~ 8 0
75 2MASS J19105486-5956459 RG* 19 10 54.8606962440 -59 56 45.961030536   13.77 13.07     ~ 9 0
76 2MASS J19105512-5959466 RG* 19 10 55.1593983360 -59 59 46.692687120   13.419 12.416     ~ 5 0
77 NGC 6752 48 RG* 19 10 55.4747278920 -59 55 44.917750200   13.90 12.96     ~ 17 0
78 Cl* NGC 6752 CBG 15323 RG* 19 10 55.540 -59 59 30.68   13.871 12.971     ~ 5 0
79 2MASS J19105575-5959059 RG* 19 10 55.7741251368 -59 59 05.829471096   14.374 13.553     ~ 4 0
80 2MASS J19105581-5958535 RG* 19 10 55.814 -59 58 53.50   14.871 14.091     ~ 5 0
81 2MASS J19105583-5956183 RG* 19 10 55.8492607560 -59 56 18.288178800   15.322 14.553     ~ 7 0
82 2MASS J19105654-5957494 RG* 19 10 56.5614080760 -59 57 49.412279556   14.990 14.231     ~ 7 0
83 Cl* NGC 6752 CBG 24880 RG* 19 10 56.7445560960 -59 57 05.346695376   12.945 11.806     ~ 15 0
84 2MASS J19105678-5958246 RG* 19 10 56.7963372048 -59 58 24.636532656   13.704 12.765     ~ 7 0
85 Cl* NGC 6752 CBG 4625 RG* 19 10 57.5033981544 -60 04 35.268936708   14.135 13.235     ~ 12 0
86 Cl* NGC 6752 CBG 15222 RG* 19 10 57.5971635960 -59 59 31.941470796   14.543 13.730     ~ 9 0
87 2MASS J19105770-5959184 RG* 19 10 57.7115549826 -59 59 18.283505090   14.493 13.672     ~ 7 0
88 2MASS J19105787-6000418 RG* 19 10 57.8905979208 -60 00 41.767828560   14.941 14.187     ~ 10 0
89 2MASS J19105930-5959164 RG* 19 10 59.3123853768 -59 59 16.385042112   13.385 12.395     ~ 7 0
90 2MASS J19105963-5958533 RG* 19 10 59.6512491888 -59 58 53.216252148   14.473 13.648     ~ 7 0
91 2MASS J19105985-5957522 RG* 19 10 59.8669972104 -59 57 52.220933100   12.986 11.856     ~ 7 0
92 2MASS J19110030-5958229 RG* 19 11 00.3098961888 -59 58 22.893728844   14.466 13.632     ~ 7 0
93 2MASS J19110066-6001085 RG* 19 11 00.6790078512 -60 01 08.474663424   14.599 13.754     ~ 5 0
94 2MASS J19110083-5957520 RG* 19 11 00.8458634088 -59 57 51.992950248   14.314 13.467     ~ 9 0
95 2MASS J19110116-5959122 RG* 19 11 01.1708144352 -59 59 12.178368168   14.888 14.086     ~ 7 0
96 Cl* NGC 6752 CBG 5530 RG* 19 11 01.9742373888 -60 03 32.869316808   14.538 13.708     ~ 11 0
97 2MASS J19110323-5959422 RG* 19 11 03.2736336360 -59 59 42.235202904   14.928 14.135     ~ 5 0
98 2MASS J19110417-6000299 RG* 19 11 04.1805427152 -60 00 29.927395656   15.249 14.504     ~ 7 0
99 Cl* NGC 6752 CBG 29686 RG* 19 11 04.3502282856 -59 54 15.185627316   14.464 13.629     ~ 11 0
100 2MASS J19110438-6000002 RG* 19 11 04.3966729800 -60 00 00.143330220   14.561 13.716     ~ 5 0
101 Cl* NGC 6752 CBG 30409 RG* 19 11 04.5300464952 -59 53 19.873249584   14.416 13.568     ~ 12 0
102 2MASS J19110565-5957041 RG* 19 11 05.6722017720 -59 57 04.053854160   15.264 14.526     ~ 11 0
103 2MASS J19110714-5959442 RG* 19 11 07.1518034232 -59 59 44.170964628   13.27 12.27     ~ 16 0
104 NGC 6752 14 RG* 19 11 07.7040565728 -60 01 23.911253436   14.63 13.78     ~ 13 0
105 Cl* NGC 6752 CBG 21948 RG* 19 11 07.9440247896 -59 57 59.080714524   14.402 13.582     ~ 9 0
106 2MASS J19110801-5959598 RG* 19 11 08.0259792240 -59 59 59.777559060   14.814 13.981     ~ 7 0
107 NGC 6752 40 RG* 19 11 08.6005699224 -59 57 35.878113540   14.82 14.12     ~ 14 0
108 Cl* NGC 6752 CBG 29265 RG* 19 11 08.7017107464 -59 54 40.423896432   14.935 14.147     ~ 13 0
109 2MASS J19111014-5957416 RG* 19 11 10.1541361296 -59 57 41.661949896   15.230 14.480     ~ 3 0
110 Cl* NGC 6752 CBG 14084 RG* 19 11 10.2285406104 -59 59 48.354399204   14.533 13.709     ~ 12 0
111 NGC 6752 28 RG* 19 11 11.1684637896 -60 00 16.942232952   14.07 13.33     ~ 19 0
112 GES J19111155-6001172 RG* 19 11 11.5621929528 -60 01 17.148849852   14.999 14.214     ~ 9 0
113 NGC 6752 37 RG* 19 11 11.6425951848 -59 58 28.749173376   14.89 14.08     ~ 21 0
114 NGC 6752 17 RG* 19 11 13.4059513224 -60 02 30.244768548   14.85 14.06     ~ 20 0
115 2MASS J19111448-6001048 RG* 19 11 14.5027612392 -60 01 04.821767004   14.519 13.681     ~ 7 0
116 2MASS J19111574-5959001 RG* 19 11 15.7523596996 -59 59 00.089964690   15.092 14.304     ~ 9 0
117 Cl* NGC 6752 CBG 31745 RG* 19 11 15.8749682040 -59 50 22.342519068   14.250 13.396     ~ 10 0
118 2MASS J19111810-6001125 RG* 19 11 18.1142353224 -60 01 12.512071020   15.19 14.48     ~ 8 0
119 NGC 6752 21 RG* 19 11 18.4464151560 -60 01 34.907763900   15.08 14.38     ~ 13 0
120 NGC 6752 32 RG* 19 11 18.5097639600 -59 59 41.691616980   14.58 13.63     ~ 17 0
121 Cl* NGC 6752 CL 1015 RG* 19 11 18.8129918784 -60 06 45.871175520   13.018 11.924 11.667   ~ 22 0
122 NGC 6752 30 RG* 19 11 19.4663098272 -60 00 34.729621596   13.27 12.195     ~ 32 0
123 Cl* NGC 6752 CBG 30426 RG* 19 11 20.3342288856 -59 53 18.327807492   14.885 14.075     ~ 11 0
124 Cl* NGC 6752 CBG 21647 RG* 19 11 22.7219966664 -59 58 03.411774984   15.072 14.289     ~ 13 0
125 Cl* NGC 6752 BUON 1113 RG* 19 11 23.1147114120 -59 59 39.720399864   14.815 14.002     ~ 19 0
126 Cl* NGC 6752 CBG 26529 Ce* 19 11 24.8888667048 -59 56 24.298621368   14.305 13.444     ~ 15 0
127 Cl* NGC 6752 CBG 6840 RG* 19 11 24.9826752552 -60 02 30.775324380   15.105 14.340     ~ 13 0
128 Cl* NGC 6752 CBG 30272 RG* 19 11 29.2169953320 -59 53 31.810368516   13.892 12.970     ~ 12 0
129 Cl* NGC 6752 CBG 19323 RG* 19 11 31.9375095624 -59 58 37.238379024   14.569 13.725     ~ 11 0
130 Cl* NGC 6752 CBG 31731 RG* 19 11 31.9499653416 -59 50 24.037581516   14.302 13.417     ~ 10 0
131 Cl* NGC 6752 YGN 4 RG* 19 11 32.6634739224 -60 00 02.105715024   14.322 13.491     ~ 18 0
132 Cl* NGC 6752 CBG 31538 RG* 19 11 34.7098342320 -59 51 01.893490344   14.254 13.341     ~ 10 0
133 Cl* NGC 6752 CBG 2704 RG* 19 11 42.9063259944 -59 54 24.431999616   14.545 13.718     ~ 9 0
134 Cl* NGC 6752 CS 124 RG* 19 11 43.0601728728 -59 56 45.303246420   14.192 13.343     ~ 15 0
135 Cl* NGC 6752 CS 125 RG* 19 11 46.2521447112 -59 56 58.867757952   13.217   11.956   ~ 18 0
136 Cl* NGC 6752 CS 128 RG* 19 11 46.6900455792 -59 58 08.745061980   14.604 13.791     ~ 15 0
137 Cl* NGC 6752 CBG 1584 RG* 19 11 52.3443608400 -59 58 52.754866500   15.007 14.241     ~ 12 0
138 Cl* NGC 6752 CBG 2817 RG* 19 11 53.2579609296 -59 53 50.022987720   14.755 13.939     ~ 12 0
139 Cl* NGC 6752 CBG 1493 RG* 19 11 54.7848203280 -59 59 15.366501924   14.643 13.858     ~ 9 0
140 2MASS J19120074-6000118 RG* 19 12 00.7521501600 -60 00 11.833699680   14.383 13.556     ~ 6 0
141 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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