2003ApJ...585L..45S

Query : 2003ApJ...585L..45S

2003ApJ...585L..45S - Astrophys. J., 585, L45-L48 (2003/March-1)

Carbon isotopes in globular clusters down to the bump in the luminosity function.

SHETRONE M.D.

Abstract (from CDS):

We find that the 12C/13C ratio evolves from high values (>20) below the bump in the luminosity function (BLF) to near the equilibrium value of the CNO cycle above the BLF in the globular clusters (GCs) NGC 6528 and M4. This is the first time that the predicted decline of the 12C/13C ratios due to the extra mixing at the BLF is detected in a GC. In M4, a slight decline from 12C/13C = 10 just above the BLF at MV=+0.5 to 12C/13C = 4 at MV=-0.6 is detected, suggesting that some additional mixing may occur beyond the BLF in this cluster. Isotope ratios are measured and found to be constant in the GCs NGC 6553 and 47 Tucanae down to just above the BLF of those GCs.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Globular Clusters: Individual: Messier Number: M4 - Galaxy: Globular Clusters: Individual: NGC Number: NGC 6528 - Galaxy: Globular Clusters: Individual: NGC Number: NGC 6553 - Galaxy: Globular Clusters: Individual: Name: 47 Tucanae - Stars: Abundances - Stars: Evolution

CDS comments: Table 1 : Stars in NGC 6528 = Cl* NGC 6528 RGS 6-NNNNN, not in SIMBAD. In 47 Tuc : Cl* NGC 104 LEE NNNN, in M4 : Cl* NGC 6121 LEE NNNN, in NGC 6553 : Cl* NGC 6553 SSR NNNNN

Simbad objects: 30

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Number of rows : 30
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 Cl* NGC 104 LEE 2302 * 00 19 43.9293184392 -72 06 20.377452096   15.11 14.11     ~ 3 0
2 Cl* NGC 104 HH 9413 * 00 23 23.0 -72 04 24   14.64 13.56     ~ 14 0
3 Cl* NGC 104 HH 9036 * 00 23 23 -72 04.4   14.19 12.96     ~ 10 0
4 Cl* NGC 104 HH 9062 * 00 23 23 -72 04.4   15.07 14.06     ~ 4 0
5 Cl* NGC 104 LEE 1604 * 00 23 23.0 -72 04 24   14.22 13.01     ~ 10 0
6 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
7 Cl* NGC 6121 LEE 2422 RG* 16 23 14.5990497360 -26 30 46.990708560 15.05 13.901 12.482   10.813 ~ 22 0
8 NGC 6121 424 RG* 16 23 16.9017005856 -26 29 47.955475500 15.28 14.389 13.100   11.559 ~ 22 0
9 NGC 6121 316 RG* 16 23 18.6900091416 -26 23 43.311594840   13.174 11.493   9.608 ~ 27 0
10 NGC 6121 352 RG* 16 23 21.6956365512 -26 26 46.944146328 15.61 14.821 13.565   12.031 ~ 21 0
11 NGC 6121 241 RG* 16 23 23.5445994696 -26 33 41.335025544 15.18 14.40 13.109   11.463 ~ 17 0
12 NGC 6121 89 RG* 16 23 27.0069390312 -26 30 44.470825020 15.38 14.555 13.291   11.764 ~ 15 0
13 NGC 6121 244 RG* 16 23 27.0867816384 -26 33 29.744986932 15.32 14.630 13.361   11.786 ~ 19 0
14 Cl* NGC 6121 ALC 430 Pe* 16 23 27.9862391280 -26 30 34.126961436   15.295 14.086     ~ 6 0
15 2MASS J16232988-2631490 AB* 16 23 29.8820971752 -26 31 49.183529844 14.38 13.360 11.990   10.361 ~ 23 0
16 NGC 6121 592 RG* 16 23 31.5128188008 -26 36 18.512950140 15.38 14.708 13.456   11.910 ~ 17 0
17 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
18 NGC 6121 259 RG* 16 23 38.4683784336 -26 33 19.295581140 15.13 12.818 10.833   8.608 ~ 42 0
19 NGC 6121 261 RG* 16 23 39.2711924040 -26 33 06.121074240   12.718 10.776   8.620 ~ 47 0
20 Cl* NGC 6121 SAW V60 RG* 16 23 45.2128635960 -26 33 56.900805768 15.54 14.82 13.56 12.79 12.02 ~ 23 0
21 Cl* NGC 6121 LEE 4511 RG* 16 23 49.8048740256 -26 33 58.872520404 14.83 13.177 11.568   9.748 ~ 30 0
22 2MASS J16235440-2625538 RG* 16 23 54.4034989056 -26 25 53.852181636   13.771 12.475   10.938 ~ 11 0
23 2MASS J16235655-2639011 RG* 16 23 56.5533924936 -26 39 01.136087136   13.406 11.990   10.281 ~ 9 0
24 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 561 0
25 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
26 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
27 Cl* NGC 6553 SSR 29221 * ~ ~   16.50       ~ 1 0
28 Cl* NGC 6553 SSR 30818 * ~ ~   15.93       ~ 1 0
29 Cl* NGC 6553 SSR 32731 * ~ ~     15.46     ~ 1 0
30 Cl* NGC 6553 SSR 27424 * ~ ~     15.30     ~ 1 0

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