2010A&A...520A..95C


Query : 2010A&A...520A..95C

2010A&A...520A..95C - Astronomy and Astrophysics, volume 520, A95-95 (2010/9-2)

Detailed abundances of a large sample of giant stars in M 54 and in the Sagittarius nucleus.

CARRETTA E., BRAGAGLIA A., GRATTON R.G., LUCATELLO S., BELLAZZINI M., CATANZARO G., LEONE F., MOMANY Y., PIOTTO G. and D'ORAZI V.

Abstract (from CDS):

Homogeneous abundances of light elements, α-elements, and Fe-group elements from high-resolution FLAMES spectra are presented for 76 red giant stars in NGC 6715 (M 54), a massive globular cluster (GC) lying in the nucleus of the Sagittarius dwarf galaxy. We also derived detailed abundances for 27 red giants belonging to the Sgr nucleus. Our abundances measure the intrinsic metallicity dispersion (∼0.19dex, rms scatter) of M 54, with the bulk of stars peaking at [Fe/H]~-1.6 and a long tail extending to higher metallicities, similar to ω Cen. The spread in these probable nuclear star clusters exceeds those of most GCs: these massive clusters are located in a region intermediate between normal GCs and dwarf galaxies. The GC M 54 exibits a Na-O anticorrelation, a typical signature of GCs, which is instead absent for the Sgr nucleus. The light elements (Mg, Al, Si) participating in the high temperature Mg-Al cycle show that the entire pattern of (anti)correlations produced by proton-capture reactions in H-burning is clearly different between the most metal-rich and most metal-poor components in the two most massive GCs in the Galaxy, confirming early results based on the Na-O anticorrelation. As in ω Cen, stars affected by most extreme processing, i.e. showing the signature of more massive polluters, are those of the metal-rich component. These observations can be understood if the burst of star formation giving birth to the metal-rich component was delayed by as much as 10-30 Myr with respect to the metal-poor one. The evolution of these massive GCs can be easily reconciled in the general scenario for the formation of GCs sketched previously by ourselves, taking into account that ω Cen may have already incorporated the surrounding nucleus of its progenitor and lost the remainder of the hosting galaxy while the two are still observable as distinct components in M 54 and the surrounding field.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: atmospheres - stars: Population II - globular clusters: individual: NGC 6715 (M 54) - clusters: individual: NGC 5139 - globular clusters: general globular

VizieR on-line data: <Available at CDS (J/A+A/520/A95): table2.dat table3.dat table5.dat table6.dat table7.dat>

Nomenclature: Tables 2-3, 5-7: [CBG2010] NNNNNNNN N=103 among (Nos 15001387-42146527).

Simbad objects: 121

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Number of rows : 121
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME WLM Galaxy G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 624 2
2 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1232 4
3 NAME Sagittarius Stream St* 02 22 +00.0           ~ 757 0
4 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1611 1
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6277 1
6 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 876 0
7 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1332 0
8 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3229 0
9 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1757 0
10 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 931 0
11 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12903 0
12 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1295 0
13 2MASS J18541366-3033271 RG* 18 54 13.6547810592 -30 33 27.168901344   18.016 16.401   14.727 K 6 0
14 2MASS J18541827-3030460 RG* 18 54 18.2639827056 -30 30 46.036688616   17.617 16.162   14.713 ~ 1 0
15 2MASS J18541942-3029103 RG* 18 54 19.430 -30 29 10.40   17.993 16.420   14.837 ~ 1 0
16 2MASS J18542373-3024028 RG* 18 54 23.7233649072 -30 24 02.757202488   17.838 16.396   14.949 ~ 1 0
17 2MASS J18542499-3031568 RG* 18 54 24.9888664104 -30 31 56.822786760   17.571 16.127   14.598 ~ 4 0
18 2MASS J18542656-3031373 RG* 18 54 26.5605257424 -30 31 37.322058252   17.518 15.915 14.96 14.200 K 2 0
19 2MASS J18543308-3027192 RG* 18 54 33.0811253232 -30 27 19.129653072   17.859 15.918   14.298 ~ 1 0
20 2MASS J18543327-3033579 RG* 18 54 33.2706305640 -30 33 58.024602000   17.490 15.049   13.904 ~ 1 0
21 2MASS J18543395-3030293 RG* 18 54 33.9565977000 -30 30 29.386203228   18.029 16.347   14.566 ~ 4 0
22 2MASS J18543440-3033343 RG* 18 54 34.4078054448 -30 33 34.426575000   17.792 16.438   15.010 ~ 1 0
23 2MASS J18544474-3026168 RG* 18 54 44.7567891072 -30 26 16.796308848   17.693 16.233   14.631 ~ 2 0
24 2MASS J18544629-3031487 RG* 18 54 46.2930786480 -30 31 48.710160732   17.204 15.897   14.498 ~ 2 0
25 2MASS J18544943-3034297 RG* 18 54 49.4436867672 -30 34 29.739485100   17.366 15.940   14.319 ~ 1 0
26 2MASS J18545056-3029452 RG* 18 54 50.5701234960 -30 29 45.265827984   17.387 16.219   14.856 ~ 1 0
27 2MASS J18545211-3024229 RG* 18 54 52.1160959376 -30 24 22.888105164   17.789 16.183   14.699 ~ 2 0
28 2MASS J18545222-3029129 LP* 18 54 52.2234882624 -30 29 12.946408296   16.901 15.368   13.717 ~ 2 0
29 2MASS J18545238-3026303 RG* 18 54 52.3912627560 -30 26 30.287878548   17.593 16.388   15.058 ~ 2 0
30 2MASS J18545437-3033140 RG* 18 54 54.3809192664 -30 33 14.025831696   17.592 16.378   15.095 ~ 1 0
31 2MASS J18545470-3027044 RG* 18 54 54.7073400384 -30 27 04.443839928   16.692 15.176   13.542 ~ 3 0
32 2MASS J18545470-3024460 RG* 18 54 54.7126766544 -30 24 45.920488320   17.506 16.272   14.925 ~ 1 0
33 2MASS J18545574-3021018 RG* 18 54 55.7535368760 -30 21 01.818900648   17.968 16.378   14.626 ~ 1 0
34 2MASS J18545622-3028204 RG* 18 54 56.2265823672 -30 28 20.449547004   17.135 15.881   14.487 ~ 1 0
35 2MASS J18545682-3018190 RG* 18 54 56.824 -30 18 19.07   17.946 16.349   14.664 K 2 0
36 2MASS J18545711-3020453 RG* 18 54 57.1179695352 -30 20 45.332456568   17.361 16.032   14.607 ~ 2 0
37 2MASS J18545712-3029046 RG* 18 54 57.121 -30 29 04.60   17.264 15.960   14.527 ~ 1 0
38 2MASS J18545715-3034133 RG* 18 54 57.1572628896 -30 34 13.361617308   16.820 15.323   13.783 ~ 1 0
39 2MASS J18545774-3025574 LP* 18 54 57.7469224560 -30 25 57.398777364   17.010 15.297   13.613 ~ 3 0
40 [CBG2010] 38005587 RG* 18 54 57.9285035304 -30 26 55.398402312   17.668 16.319   14.798 ~ 1 0
41 2MASS J18545810-3028587 RG* 18 54 58.1120060448 -30 28 58.763368272   17.491 16.176   14.798 ~ 2 0
42 2MASS J18545830-3027343 RG* 18 54 58.3080400032 -30 27 34.338382884   17.454 15.578   13.798 ~ 1 0
43 2MASS J18545882-3029234 RG* 18 54 58.829 -30 29 23.43   17.361 15.981   14.574 ~ 1 0
44 [CBG2010] 38004627 RG* 18 54 59.080 -30 29 34.40   17.561 16.411   15.122 ~ 1 0
45 2MASS J18545920-3028403 RG* 18 54 59.2060062168 -30 28 40.284262776   16.892 15.422   13.890 ~ 3 0
46 [CBG2010] 38000557 LP* 18 54 59.4843053808 -30 28 19.474165092   16.768 15.100   13.415 ~ 2 0
47 2MASS J18545991-3032093 RG* 18 54 59.9129552184 -30 32 09.303218628   17.635 16.380   15.051 ~ 1 0
48 [CBG2010] 38009987 LP* 18 55 00.0950770920 -30 30 33.410838888   17.203 15.957   14.556 ~ 2 0
49 [CBG2010] 38000997 RG* 18 55 00.160 -30 28 35.88   16.996 15.493   14.004 ~ 1 0
50 [CBG2010] 38001267 RG* 18 55 00.2912507616 -30 28 47.420581548   17.011 15.661   14.223 ~ 1 0
51 2MASS J18550068-3027568 LP* 18 55 00.6849103344 -30 27 56.789478072   17.031 15.673   14.201 ~ 3 0
52 2MASS J18550076-3034068 RG* 18 55 00.7672003608 -30 34 06.871639332   17.099 15.815   14.422 ~ 2 0
53 2MASS J18550080-3027022 LP* 18 55 00.8072596056 -30 27 02.191419432   16.709 15.103   13.423 ~ 2 0
54 [CBG2010] 38000407 RG* 18 55 01.070 -30 28 33.46   16.684 15.172   13.584 ~ 1 0
55 2MASS J18550148-3029001 RG* 18 55 01.488 -30 29 00.11   16.689 15.194   13.609 ~ 1 0
56 [CBG2010] 38002927 RG* 18 55 01.670 -30 29 17.19   17.461 16.145   14.755 ~ 1 0
57 2MASS J18550175-3037120 RG* 18 55 01.7596865112 -30 37 12.089338536   17.735 16.346   14.880 ~ 3 0
58 [CBG2010] 38001557 RG* 18 55 01.8839030232 -30 28 21.900842256   17.082 15.758   14.345 ~ 1 0
59 [CBG2010] 38000867 RG* 18 55 02.2599152424 -30 29 10.320466272   16.905 15.490   13.976 ~ 2 0
60 2MASS J18550241-3029440 RG* 18 55 02.415 -30 29 44.00   17.477 16.137   14.772 ~ 1 0
61 [CBG2010] 38003657 RG* 18 55 02.560 -30 30 01.62   17.352 16.199   14.848 ~ 1 0
62 2MASS J18550285-3028122 RG* 18 55 02.853 -30 28 12.24   16.850 15.416   13.920 ~ 1 0
63 [CBG2010] 38000737 RG* 18 55 02.9157150168 -30 29 20.271733044   16.952 15.431   13.869 ~ 1 0
64 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1947 2
65 2MASS J18550313-3030521 RG* 18 55 03.1342257864 -30 30 52.164049572   17.614 16.423   15.128 ~ 1 0
66 2MASS J18550318-3030281 RG* 18 55 03.180 -30 30 28.14   17.439 16.151   14.757 ~ 1 0
67 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 995 0
68 [CBG2010] 38000927 RG* 18 55 03.5015682120 -30 29 21.199178688   17.137 15.500   13.841 ~ 1 0
69 [CBG2010] 24269257 RG* 18 55 03.5652602088 -30 27 59.961842172   17.111 15.372   13.712 ~ 1 0
70 [CBG2010] 38002997 RG* 18 55 03.7732919520 -30 28 06.695727348   17.474 16.174   14.828 ~ 1 0
71 [CBG2010] 38002977 RG* 18 55 03.870 -30 29 08.00   17.524 16.176   14.798 ~ 1 0
72 [CBG2010] 38002357 RG* 18 55 03.900 -30 29 31.50   17.256 15.972   14.576 ~ 2 0
73 2MASS J18550498-3028562 RG* 18 55 04.983 -30 28 56.27   17.113 15.838   14.452 ~ 2 0
74 [CBG2010] 24211267 RG* 18 55 05.100 -30 29 13.18   16.821 15.460   13.989 ~ 1 0
75 [CBG2010] 38004437 RG* 18 55 05.120 -30 28 17.73   17.661 16.452   15.152 ~ 1 0
76 2MASS J18550535-3028262 RG* 18 55 05.360 -30 28 26.23   17.594 16.032   14.358 ~ 1 0
77 [CBG2010] 38001327 RG* 18 55 05.5249758192 -30 29 18.834736092   17.096 15.707   14.165 ~ 2 0
78 2MASS J18550560-3026332 RG* 18 55 05.6040842328 -30 26 33.179950140   17.635 16.315   15.021 ~ 3 0
79 [CBG2010] 38002047 RG* 18 55 05.7702988944 -30 27 56.868630156   17.181 15.805   14.249 ~ 1 0
80 [CBG2010] 38000567 RG* 18 55 05.800 -30 28 44.47   16.775 15.240   13.622 ~ 1 0
81 [CBG2010] 38000327 RG* 18 55 05.9141823840 -30 28 11.167268844   16.776 15.065   13.320 ~ 1 0
82 2MASS J18550603-3028169 RG* 18 55 06.035 -30 28 17.00   16.980 15.626   14.236 ~ 1 0
83 2MASS J18550623-3030561 RG* 18 55 06.2326710648 -30 30 56.154587184   17.348 16.029   14.627 ~ 3 0
84 [CBG2010] 38003237 RG* 18 55 06.440 -30 29 11.77   17.444 16.251   14.931 ~ 1 0
85 [CBG2010] 38000517 RG* 18 55 06.5959936574 -30 28 54.798288254   16.915 15.282   13.604 ~ 1 0
86 [CBG2010] 15001387 RG* 18 55 07.9189482696 -30 25 02.893635768   16.945 15.475   13.935 ~ 1 0
87 [CBG2010] 38002197 RG* 18 55 07.930 -30 28 20.08   17.307 15.925   14.480 ~ 1 0
88 2MASS J18550901-3027365 RG* 18 55 09.0170322912 -30 27 36.545188608   17.391 16.103   14.710 ~ 1 0
89 [CBG2010] 38003847 RG* 18 55 09.0233238000 -30 30 29.691107496   17.603 16.357   15.030 ~ 1 0
90 [CBG2010] 38003047 RG* 18 55 09.190 -30 29 44.35   17.398 16.168   14.814 ~ 1 0
91 2MASS J18551026-3033406 RG* 18 55 10.2593393208 -30 33 40.643696160   17.148 15.089   13.370 ~ 2 0
92 2MASS J18551034-3027105 RG* 18 55 10.3420140960 -30 27 10.510036632   17.257 15.903   14.454 ~ 2 0
93 2MASS J18551040-3027399 RG* 18 55 10.3979214096 -30 27 39.878389692   17.365 15.996   14.577 ~ 1 0
94 2MASS J18551061-3029597 RG* 18 55 10.610 -30 29 59.71   17.766 16.481   15.161 ~ 3 0
95 2MASS J18551093-3019493 RG* 18 55 10.9313721264 -30 19 49.320858432   17.875 16.295   14.531 K 2 0
96 2MASS J18551137-3032350 RG* 18 55 11.3809062240 -30 32 35.147095116   17.441 16.174   14.797 ~ 1 0
97 2MASS J18551191-3027239 RG* 18 55 11.9182680768 -30 27 23.940258084   17.180 15.714   14.156 ~ 2 0
98 [CBG2010] 38011977 RG* 18 55 12.9880421760 -30 30 25.752413988   17.602 16.401   15.091 ~ 2 0
99 2MASS J18551359-3026042 RG* 18 55 13.5915823056 -30 26 04.242146928   16.880 15.624   13.636 ~ 1 0
100 2MASS J18551416-3028548 RG* 18 55 14.1655962096 -30 28 54.783742188   17.016 15.503   13.942 ~ 3 0
101 2MASS J18551487-3028282 RG* 18 55 14.8733131801 -30 28 28.150465259   17.245 16.207   14.698 ~ 1 0
102 2MASS J18551672-3027508 RG* 18 55 16.7280523992 -30 27 50.878585800   17.459 16.154   14.870 ~ 3 0
103 2MASS J18551684-3027074 RG* 18 55 16.847 -30 27 07.47   17.677 16.223   14.868 ~ 1 0
104 2MASS J18551842-3025181 RG* 18 55 18.4267760472 -30 25 18.202044972   17.688 16.111   14.673 ~ 5 0
105 2MASS J18551930-3036017 RG* 18 55 19.3083445368 -30 36 01.724843844   17.970 16.459   14.862 ~ 1 0
106 2MASS J18552010-3032039 RG* 18 55 20.1138786552 -30 32 03.859004004   17.767 16.395   14.911 ~ 1 0
107 2MASS J18552039-3026523 RG* 18 55 20.4006250296 -30 26 52.370428452   17.688 16.442   15.065 ~ 2 0
108 [CBG2010] 23002057 RG* 18 55 20.8966042056 -30 31 16.108111272   18.100 16.512   14.701 ~ 2 0
109 2MASS J18552958-3024306 RG* 18 55 29.5848548784 -30 24 30.697957548   17.049 15.753   14.369 ~ 5 0
110 2MASS J18552982-3028545 RG* 18 55 29.8300570416 -30 28 54.536265912   17.111 15.618   14.098 ~ 2 0
111 2MASS J18553079-3028198 RG* 18 55 30.7999470000 -30 28 19.860929976   17.983 16.264   14.540 ~ 5 0
112 2MASS J18553262-3025261 RG* 18 55 32.6310295416 -30 25 26.214322656   17.235 15.863   14.361 ~ 1 0
113 2MASS J18553775-3019271 RG* 18 55 37.7551124568 -30 19 27.189073920   17.673 15.933   14.079 M 2 0
114 [CBG2010] 16105067 RG* 18 55 45.1604386944 -30 21 18.248350104   17.361 15.813   14.218 ~ 1 0
115 2MASS J18554672-3035248 RG* 18 55 46.7303661768 -30 35 24.818937180   17.338 16.094   14.085 K 2 0
116 2MASS J18554683-3028372 RG* 18 55 46.8446351904 -30 28 37.170704100   17.500 16.018   14.472 ~ 5 0
117 2MASS J18555386-3025231 RG* 18 55 53.8676989392 -30 25 23.118510324   17.600 16.084   14.377 K 2 0
118 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 396 0
119 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 1072 0
120 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 3021 0
121 NAME Local Group GrG ~ ~           ~ 7638 0

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2022.05.21-11:16:26

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