2005A&A...433..597C


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.15CEST23:32:26

2005A&A...433..597C - Astronomy and Astrophysics, volume 433, 597-611 (2005/4-2)

Abundances of C, N, O in slightly evolved stars in the globular clusters NGC 6397, NGC 6752 and 47 Tuc.

CARRETTA E., GRATTON R.G., LUCATELLO S., BRAGAGLIA A. and BONIFACIO P.

Abstract (from CDS):

Abundances of C and N are derived from features due to the CH G-band and to the UV CN band measured on high resolution (R>40000) UVES spectra of more than 40 dwarfs and subgiants in NGC 6397, NGC 6752 and 47 Tuc. Oxygen abundances (or upper limits) are available for all stars in the sample. Isotopic ratios 12C/13C were derived from the CH molecular band. This is the first determination of this ratio in unevolved dwarf stars in globular clusters. By enlarging the sample of subgiants in NGC 6397 studied in Gratton et al. (2001A&A...369...87G), we uncovered, for the first time, large variations in both Na and O in this cluster, too. The origin of the chemical inhomogeneities must be searched for outside the stars under scrutiny. Our data indicate that C abundances are low but not zero in unevolved or slightly evolved stars in these clusters, including in stars with large N-enhancements and O-depletions. The isotopic ratios 12C/13C are low, but never reach the equilibrium value of the CN-cycle. When coupled to the run of O and Na abundances, these findings may require that, in addition to CNO burning and p-captures, some triple-α process is also involved: previously evolved intermediate-mass AGB stars are then the most likely polluters.

Abstract Copyright:

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

Simbad objects: 50

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Number of rows : 50

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Cl* NGC 104 GVS 206415 * 00 19 36.40 -71 58 57.0           ~ 4 0
2 Cl* NGC 104 GVS 429 * 00 20 18.9980927880 -72 01 11.188448877   16.699 19.022     ~ 4 0
3 Cl* NGC 104 GVS 975 * 00 20 52.30 -71 58 01.8   17.919 17.322     ~ 6 0
4 Cl* NGC 104 GVS 1081 * 00 21 03.82 -72 06 57.7   17.962 17.375     ~ 6 0
5 Cl* NGC 104 GVS 478 * 00 21 08.3955677091 -71 58 46.481752235   17.609 16.827     ~ 3 0
6 Cl* NGC 104 GVS 482 * 00 21 10.88 -72 04 15.2   17.352 18.097     ~ 4 0
7 Cl* NGC 104 GVS 435 * 00 21 13.65 -72 03 32.4   17.540 16.739     ~ 3 0
8 Cl* NGC 104 GVS 1012 * 00 21 26.5743753535 -72 00 37.148937241   17.942 17.361     ~ 6 0
9 Cl* NGC 104 GVS 456 * 00 21 30.42 -72 05 35.9   17.537 16.746     ~ 3 0
10 Cl* NGC 104 GVS 433 * 00 21 49.24 -72 02 54.1   17.502 16.723     ~ 4 0
11 Cl* NGC 104 GVS 201600 * 00 21 52.55 -72 05 27.7           ~ 4 0
12 Cl* NGC 104 GVS 201075 * 00 22 00.40 -72 05 59.4           ~ 5 0
13 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3648 0
14 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1823 0
15 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2056 0
16 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1949 0
17 Cl* NGC 6397 GVS 1543 * 17 39 36.17 -53 40 20.7           ~ 5 0
18 Cl* NGC 6397 GVS 777 * 17 39 41.54 -53 37 13.6           ~ 2 0
19 Cl* NGC 6397 GVS 793 HB* 17 39 55.9063512985 -53 35 11.986878206   16.090 15.551   14.56 ~ 8 0
20 Cl* NGC 6397 GVS 1905 * 17 40 01.13 -53 35 56.9           ~ 5 0
21 Cl* NGC 6397 GVS 1622 * 17 40 09.0994543031 -53 43 26.482744384   16.596 16.200   15.622 ~ 6 0
22 Cl* NGC 6397 GVS 706 * 17 40 09.14 -53 42 08.9           ~ 2 0
23 Cl* NGC 6397 GVS 201432 * 17 40 16.0803009222 -53 47 18.739606195   16.669 16.278   15.708 ~ 6 0
24 Cl* NGC 6397 GVS 729 * 17 40 24.98 -53 43 31.9           ~ 2 0
25 Cl* NGC 6397 GVS 703 * 17 40 31.5899897708 -53 36 41.061187036           ~ 2 0
26 Cl* NGC 6397 GVS 206810 * 17 40 34.5834934535 -53 33 20.865155597   16.058 15.514   14.54 ~ 7 0
27 Cl* NGC 6397 GVS 760 * 17 40 35.94 -53 42 48.3           ~ 2 0
28 Cl* NGC 6397 GVS 737 * 17 40 38.80 -53 35 05.9           ~ 2 0
29 Cl* NGC 6397 GVS 202765 * 17 40 41.5967069340 -53 45 49.369089552   16.662 16.271   15.701 ~ 6 0
30 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1839 1
31 Cl* NGC 6397 GVS 669 * 17 40 43.7538685371 -53 37 17.520486787   15.899 15.339   14.34 ~ 7 0
32 Cl* NGC 6752 GVS 1481 * 19 10 19.68 -60 01 27.8     15.95     ~ 6 0
33 Cl* NGC 6752 GVS 4661 * 19 10 20.98 -60 01 47.6     17.216     ~ 7 0
34 Cl* NGC 6752 GVS 1406 * 19 10 22.32 -60 03 19.7     15.90     ~ 6 0
35 Cl* NGC 6752 GVS 1460 * 19 10 23.82 -59 59 07.1     15.94     ~ 5 0
36 Cl* NGC 6752 GVS 4341 * 19 10 29.79 -59 57 52.7     17.149     ~ 6 0
37 Cl* NGC 6752 GVS 1400 * 19 10 31.6226567865 -59 59 34.637551293     15.89     ~ 5 0
38 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1853 0
39 Cl* NGC 6752 GVS 202316 * 19 10 59.54 -59 54 00.4           ~ 6 0
40 Cl* NGC 6752 GVS 4428 * 19 10 59.8759168194 -60 02 17.125654492     17.142     ~ 9 0
41 Cl* NGC 6752 GVS 1665 * 19 11 05.0162182946 -59 55 27.386111879     16.08     ~ 7 0
42 Cl* NGC 6752 GVS 1461 * 19 11 05.18 -60 01 51.2     15.95     ~ 6 0
43 Cl* NGC 6752 GVS 1445 * 19 11 05.44 -60 01 45.9     15.89     ~ 5 0
44 Cl* NGC 6752 GVS 202063 * 19 11 05.49 -59 54 28.7           ~ 4 0
45 Cl* NGC 6752 GVS 4383 * 19 11 13.20 -60 02 24.2     17.112     ~ 6 0
46 Cl* NGC 6752 GVS 5048 * 19 11 19.958 -59 59 50.52     16.10     ~ 8 0
47 Cl* NGC 6752 GVS 1563 * 19 11 21.3661049243 -59 59 51.016491759     16.06     ~ 6 0
48 Cl* NGC 6752 GVS 4907 * 19 11 22.87 -60 03 57.6     17.199     ~ 8 0
49 Cl* NGC 6752 GVS 4458 * 19 11 26.26 -60 00 48.7     17.155     ~ 6 0
50 Cl* NGC 6752 GVS 200613 * 19 11 35.7505905495 -59 58 02.022078398           ~ 10 0

    Equat.    Gal    SGal    Ecl

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2021.06.15-23:32:26

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