2012ApJ...754L..38J

Query : 2012ApJ...754L..38J

2012ApJ...754L..38J - Astrophys. J., 754, L38 (2012/August-1)

Oxygen and sodium abundances in M13 (NGC 6205) giants: linking globular cluster formation scenarios, deep mixing, and post-RGB evolution.

JOHNSON C.I. and PILACHOWSKI C.A.

Abstract (from CDS):

We present O, Na, and Fe abundances, as well as radial velocities, for 113 red giant branch (RGB) and asymptotic giant branch (AGB) stars in the globular cluster M13. The abundances and velocities are based on spectra obtained with the WIYN-Hydra spectrograph, and the observations range in luminosity from the horizontal branch (HB) to RGB tip. The results are examined in the context of recent globular cluster formation scenarios. We find that M13 exhibits many key characteristics that suggest its formation and chemical enrichment are well described by current models. Some of these observations include the central concentration of O-poor stars, the notable decrease in [O/Fe] (but small increase in [Na/Fe]) with increasing luminosity that affects primarily the "extreme" population, the small fraction of stars with halo-like composition, and the paucity of O-poor AGB stars. In agreement with recent work, we conclude that the most O-poor M13 giants are likely He-enriched and that most (all?) O-poor RGB stars evolve to become extreme HB and AGB-manqué stars. In contrast, the "primordial" and "intermediate" population stars appear to experience standard HB and AGB evolution.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: halo - globular clusters: general - globular clusters: individual (M13, NGC 6205) - stars: abundances - stars: Population II

VizieR on-line data: <Available at CDS (J/ApJ/754/L38): table1.dat>

Simbad objects: 117

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Number of rows : 117
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 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
2 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
3 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
4 Cl* NGC 6205 KAD 188 RG* 16 40 42.9835015056 +36 27 41.839350912   14.44 13.39     ~ 32 0
5 2MASS J16410615+3625227 RG* 16 41 06.1480978464 +36 25 22.739126520   15.30 14.46     ~ 23 0
6 Cl* NGC 6205 AJ 3 RG* 16 41 06.4884305088 +36 28 13.733500476   14.29 13.25     ~ 35 0
7 NGC 6205 6 * 16 41 09.9360699984 +36 30 10.392889356   15.17 15.00     ~ 20 0
8 NGC 6205 16 RG* 16 41 15.1067397216 +36 23 53.929527180   15.48 14.60     ~ 24 0
9 NGC 6205 18 RG* 16 41 15.2185516776 +36 29 24.028790424   14.71 13.78     ~ 23 0
10 NGC 6205 26 RG* 16 41 17.0022368616 +36 25 48.070016976   14.59 13.58     ~ 28 0
11 2MASS J16411772+3629298 RG* 16 41 17.7255144336 +36 29 29.924091996   15.35 14.51     ~ 12 0
12 2MASS J16411863+3628434 RG* 16 41 18.6332061792 +36 28 43.394651256   15.89 15.12     ~ 6 0
13 NGC 6205 70 RG* 16 41 23.5306872480 +36 30 17.265922560   13.71 12.12     ~ 93 0
14 NGC 6205 72 RG* 16 41 24.0799988472 +36 25 30.784251324   13.54 12.32     ~ 73 0
15 NGC 6205 79 RG* 16 41 24.5006885952 +36 29 37.852746900   15.07 14.18     ~ 20 0
16 NGC 6205 77 RG* 16 41 24.6362215608 +36 25 45.116782032   13.97 12.77     ~ 49 0
17 NGC 6205 81 * 16 41 24.7640891976 +36 30 15.124002588   14.90 13.97     ~ 7 0
18 2MASS J16412684+3625286 RG* 16 41 26.8354247760 +36 25 28.778840760   15.64 14.85     ~ 10 0
19 NGC 6205 96 RG* 16 41 27.0864680880 +36 28 00.359401188   13.79 12.52     ~ 71 0
20 2MASS J16412735+3629304 RG* 16 41 27.3538189512 +36 29 30.440185692   15.84 15.09     ~ 5 0
21 NGC 6205 114 RG* 16 41 28.3661190048 +36 27 03.868185744   14.45 13.45     ~ 34 0
22 2MASS J16412970+3632136 RG* 16 41 29.6984778744 +36 32 13.557316164   15.44 14.58     ~ 5 0
23 2MASS J16413013+3626354 RG* 16 41 30.1280619792 +36 26 35.569874328   14.92 14.24     K4.5II-III 13 0
24 NGC 6205 158 RG* 16 41 30.5281002456 +36 29 43.440409140   13.89 12.70     ~ 46 0
25 2MASS J16413082+3630130 AB* 16 41 30.8206687560 +36 30 12.984390252   14.52 13.62     ~ 42 0
26 NGC 6205 162 * 16 41 30.8916928776 +36 25 31.694946348   15.02 14.09     ~ 8 0
27 NGC 6205 169 RG* 16 41 31.0624701336 +36 25 58.802287728   13.94 12.78     ~ 27 0
28 NGC 6205 176 RG* 16 41 31.2512479680 +36 28 02.289000108   14.18 13.31     ~ 21 0
29 NGC 6205 172 RG* 16 41 31.2715475520 +36 25 18.371836236   14.56 13.56     ~ 25 0
30 NGC 6205 193 RG* 16 41 31.8185979288 +36 28 55.418087172   14.60 13.63     ~ 17 0
31 NGC 6205 194 RG* 16 41 31.9970786088 +36 28 29.999965224   13.54 12.03     ~ 58 0
32 NGC 6205 198 * 16 41 32.3411464872 +36 27 34.758240804   13.02 12.95     ~ 6 0
33 NGC 6205 199 RG* 16 41 32.5304694216 +36 24 42.571380852   12.65 11.93 11.90   ~ 65 0
34 NGC 6205 240 RG* 16 41 33.9173386656 +36 30 05.682748896   13.71 12.34     ~ 45 0
35 NGC 6205 252 RG* 16 41 34.3412115240 +36 30 13.276471320   13.098 11.771 12.393 11.36 ~ 34 0
36 NGC 6205 244 RG* 16 41 34.3634099664 +36 25 04.761614316   13.91 12.67 12.305   ~ 41 0
37 NGC 6205 250 RG* 16 41 34.4760486024 +36 26 36.434435028   13.72 12.37     ~ 24 0
38 NGC 6205 261 RG* 16 41 34.7595031656 +36 27 59.516329536   13.50 12.17   10.79 ~ 44 0
39 NGC 6205 262 RG* 16 41 34.8156068016 +36 27 19.620308880   13.64 12.25     ~ 32 0
40 NGC 6205 269 * 16 41 34.9360666056 +36 27 30.522081456     13.14     ~ 7 0
41 NGC 6205 296 * 16 41 35.6927065296 +36 26 48.844562064   13.81 12.56     G2/5Ib 11 0
42 2MASS J16413629+3625104 RG* 16 41 36.2863923696 +36 25 10.303652496   13.81 12.58     ~ 33 0
43 2MASS J16413643+3617081 RG* 16 41 36.4282225272 +36 17 08.046335040   14.99 14.02     ~ 9 0
44 NGC 6205 324 RG* 16 41 36.6351298080 +36 26 35.468102904   13.65 12.00     ~ 47 0
45 NGC 6205 343 * 16 41 37.0734032976 +36 27 10.777338828     13.07     ~ 7 0
46 NGC 6205 353 RG* 16 41 37.2458990832 +36 29 36.770441640   13.92 12.83     G5Ib 23 0
47 NGC 6205 367 * 16 41 37.7329 +36 27 56.730   13.81 12.56     ~ 11 0
48 NGC 6205 370 * 16 41 37.7668671528 +36 26 23.962368444   14.35 13.47     ~ 10 0
49 NGC 6205 384 RG* 16 41 38.0572209744 +36 27 49.288027572   13.76 12.48     ~ 18 0
50 NGC 6205 398 * 16 41 38.31 +36 28 30.1     12.60     ~ 8 0
51 2MASS J16413862+3630369 RG* 16 41 38.6145378912 +36 30 36.829673568   15.17 14.31     ~ 7 0
52 NGC 6205 436 RG* 16 41 39.0073073760 +36 26 35.083463892   14.28 13.43     ~ 19 0
53 NGC 6205 465 RG* 16 41 39.6052268496 +36 27 38.071474200   13.81 12.50     ~ 23 0
54 NGC 6205 476 * 16 41 39.8140 +36 26 55.760     13.13     ~ 8 0
55 NGC 6205 481 * 16 41 39.8269333656 +36 28 29.020325340     12.34     G2Ib 7 0
56 NGC 6205 488 RG* 16 41 39.8599313496 +36 29 17.280549492   15.08 14.11     ~ 11 0
57 NGC 6205 557 RG* 16 41 40.8015636552 +36 34 11.459110044   15.06 14.13     ~ 24 0
58 2MASS J16414108+3627550 AB* 16 41 41.0779533936 +36 27 54.827369172   13.65 12.58     ~ 16 0
59 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
60 NGC 6205 584 * 16 41 41.74 +36 27 18.9     12.55     ~ 7 0
61 NGC 6205 594 * 16 41 41.8795852032 +36 28 13.644974820     12.86     ~ 7 0
62 2MASS J16414189+3628184 RG* 16 41 41.8841862576 +36 28 18.322587048   14.16 13.10     ~ 11 0
63 NGC 6205 598 RG* 16 41 41.9443189176 +36 26 51.715259736   13.64 12.00     ~ 57 0
64 NGC 6205 609 * 16 41 42.2287116192 +36 26 23.396606412   14.95 13.96     ~ 6 1
65 2MASS J16414255+3626563 RG* 16 41 42.5493186408 +36 26 56.173428780   13.42 11.94     ~ 38 0
66 NGC 6205 644 * 16 41 42.7790229528 +36 28 59.092696380     13.18     ~ 5 0
67 NGC 6205 666 * 16 41 43.310 +36 26 27.55     12.73     ~ 8 0
68 NGC 6205 674 * 16 41 43.3915680120 +36 27 15.573879900     12.58     ~ 7 0
69 NGC 6205 677 * 16 41 43.5660152336 +36 25 45.781233834   14.68 13.75     ~ 10 0
70 2MASS J16414398+3622338 AB* 16 41 43.9791716280 +36 22 33.652315128   14 12.96     ~ 40 0
71 NGC 6205 726 RG* 16 41 44.7755349216 +36 23 27.274350408   14.66 13.58     ~ 32 0
72 NGC 6205 745 RG* 16 41 44.8522130952 +36 30 51.375592656   13.821 12.525 12.242   ~ 37 0
73 NGC 6205 754 RG* 16 41 45.1676876808 +36 28 13.098883980   14.07 12.88     ~ 21 0
74 NGC 6205 766 RG* 16 41 45.2787311568 +36 31 06.799082448   14.53 13.54     ~ 40 0
75 2MASS J16414545+3630114 AB* 16 41 45.4395271368 +36 30 11.313200160   14.21 13.21     G5Ib-II 30 0
76 NGC 6205 777 RG* 16 41 45.4598742936 +36 29 58.531324416   13.99 12.86     ~ 24 0
77 2MASS J16414564+3631473 RG* 16 41 45.6435715608 +36 31 47.306230536   15.13 14.26     ~ 19 0
78 NGC 6205 793 * 16 41 46.0104223584 +36 27 03.687197292   14.64 13.68     ~ 4 0
79 NGC 6205 800 * 16 41 46.3369343664 +36 23 09.988848204   14.73 13.80     ~ 10 0
80 NGC 6205 824 * 16 41 46.5667375392 +36 29 24.091165824   15.21 14.34     ~ 7 0
81 2MASS J16414664+3628203 AB* 16 41 46.6346814600 +36 28 20.200750356   13.76 12.78     ~ 18 0
82 NGC 6205 830 RG* 16 41 46.7933487912 +36 27 03.777026652   13.93 12.68     ~ 18 0
83 2MASS J16414703+3625576 RG* 16 41 47.0167556736 +36 25 57.511404084   13.48 12.03     ~ 40 0
84 NGC 6205 845 RG* 16 41 47.1708648528 +36 27 43.760735208   13.87 12.53     ~ 20 0
85 NGC 6205 853 RG* 16 41 47.4290997048 +36 28 28.339241700   13.68 12.20     ~ 38 0
86 NGC 6205 863 RG* 16 41 47.6694606984 +36 29 07.991058156   13.589 12.584 12.835   ~ 12 0
87 NGC 6205 871 * 16 41 47.8903199928 +36 30 34.557000336   14.84 13.89     ~ 5 0
88 NGC 6205 877 RG* 16 41 47.9932095912 +36 29 53.047472712   14.1 13.03     ~ 22 0
89 NGC 6205 919 * 16 41 49.2574815672 +36 24 47.077855884   14.14 13.03     ~ 17 0
90 2MASS J16414966+3627104 AB* 16 41 49.6538685192 +36 27 10.284278652   13.84 12.68     ~ 24 0
91 2MASS J16414970+3627489 RG* 16 41 49.6881218256 +36 27 48.777763752   13.47 12.04     ~ 28 0
92 2MASS J16415003+3625105 AB* 16 41 50.0214941088 +36 25 10.396554816   14.13 13.14     ~ 21 0
93 NGC 6205 956 * 16 41 50.16 +36 28 15.7     13.26     ~ 6 0
94 NGC 6205 954 RG* 16 41 50.2992880776 +36 24 15.542524512   13.63 12.09     ~ 68 0
95 NGC 6205 955 RG* 16 41 50.3678850672 +36 23 41.605888344   14.82 13.79     ~ 28 0
96 NGC 6205 967 * 16 41 50.6073994200 +36 28 18.806576160   14.21 13.15     ~ 7 0
97 NGC 6205 973 RG* 16 41 50.9158586208 +36 28 54.352362612   13.65 11.91     ~ 73 0
98 NGC 6205 1001 RG* 16 41 52.3802949168 +36 28 39.406611792   14.88 13.99     ~ 34 0
99 NGC 6205 1023 RG* 16 41 54.1018338672 +36 26 09.077208828   14.11 12.99     ~ 19 0
100 NGC 6205 1030 RG* 16 41 54.6139486176 +36 27 22.832245044   14.27 13.18     ~ 17 0
101 NGC 6205 1032 RG* 16 41 54.9377488560 +36 27 41.960257704   14.73 13.81     ~ 18 0
102 2MASS J16415543+3633266 AB* 16 41 55.4264362824 +36 33 26.636168952   14.33 13.49     ~ 28 0
103 NGC 6205 1051 RG* 16 41 57.3434198280 +36 25 21.620976312   15 14.12     ~ 23 0
104 NGC 6205 1050 RG* 16 41 57.4121655000 +36 23 15.299567124   15.20 14.29     ~ 17 0
105 2MASS J16415842+3628312 AB* 16 41 58.4135522256 +36 28 31.106669268   14.90 14.05     ~ 23 0
106 NGC 6205 1072 RG* 16 42 00.3746677368 +36 25 24.812792976   15.16 14.31     ~ 15 0
107 2MASS J16420085+3623338 AB* 16 42 00.8451358560 +36 23 33.678694248   13.89 12.88     ~ 30 0
108 2MASS J16420331+3627553 RG* 16 42 03.3038196840 +36 27 55.199206116   15.70 14.92     ~ 7 0
109 NGC 6205 1096 * 16 42 03.3364465584 +36 29 12.125721084   15.26 14.40     ~ 11 0
110 2MASS J16420340+3630182 RG* 16 42 03.3983637168 +36 30 18.223848108   15.32 14.40     ~ 12 0
111 2MASS J16420985+3622261 RG* 16 42 09.8490868032 +36 22 26.085743076   14.86 14.12     ~ 10 0
112 Cl* NGC 6205 KAD 647 RG* 16 42 11.1608590872 +36 18 22.459898412   15.61 14.71     G2 18 0
113 Cl* NGC 6205 CM 12 RG* 16 42 13.6720083336 +36 33 14.776612056     15.28     ~ 21 0
114 Cl* NGC 6205 KAD 656 RG* 16 42 14.8163303232 +36 27 19.888681896   14.16 13.04     ~ 29 0
115 Cl* NGC 6205 KAD 659 RG* 16 42 16.5285131928 +36 24 58.640906016   15.16 14.24 13.1   ~ 20 0
116 2MASS J16422126+3633533 AB* 16 42 21.2650516272 +36 33 53.299708992   15.06 14.26     ~ 22 0
117 Cl* NGC 6205 KAD 699 RG* 16 42 37.8750263808 +36 24 12.677133564   14.7 13.75     ~ 26 0

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