1997PASP..109..907R

Query : 1997PASP..109..907R

1997PASP..109..907R - Publ. Astron. Soc. Pac., 109, 907-919 (1997/August-0)

Galactic globular cluster metallicity scale from the Ca II triplet II. Rankings, comparisons, and puzzles.

RUTLEDGE G.A., HESSER J.E. and STETSON P.B.

Abstract (from CDS):

begin{tex}We compare our compilation of the \redew calcium index for 71 Galactic globular clusters to the widely used zinn84Zinn and West (1984 ApJS, 55, 45) \fe scale and to Carretta and Gratton's (1997 A&AS, 121, 95) scale from high-dispersion spectra analyzed with Kurucz (1992, private communication) model atmospheres. We find our calcium ranking to be tightly correlated with each comparison set, in a non-linear and a linear fashion, respectively. By combining our calcium index information with the Zinn and West ranking, we are able to rank the globular clusters in our sample with a typical precision of ±0.05 dex for \fe_{ZW84} \lesssim -0.5; for clusters more metal rich than this, the ranking is less precise. The significant differences between these metallicity scales raise important questions about our understanding of Galactic formation and chemical enrichment processes. Furthermore, in spite of the apparent improvement in metallicity ranking for the Galactic globular clusters that results from our addition of information from the \ca triplet lines to the potpourri of other metallicity indicators, caution – perhaps considerable – may be advisable when using \redew as a surrogate for metallicity, especially for systems where ranges in age and metallicity are likely.

Abstract Copyright: ∼

Journal keyword(s): Stellar Clusters and Associations

Simbad objects: 70

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Number of rows : 70
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 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1130 0
3 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
4 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 579 0
5 NAME Eridanus Star Cluster GlC 04 24 44.5 -21 11 13           ~ 192 1
6 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
7 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 883 0
8 NGC 2298 GlC 06 48 59.41 -36 00 19.1     8.89     ~ 547 0
9 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
10 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 354 1
11 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 1001 0
12 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 379 1
13 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 616 0
14 NGC 4372 GlC 12 25 45.43 -72 39 32.7   10.86 9.85     ~ 327 0
15 Cl Ruprecht 106 GlC 12 38 40.20 -51 09 01.0           ~ 413 0
16 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 1069 0
17 NGC 4833 GlC 12 59 33.92 -70 52 35.4           ~ 467 0
18 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 675 0
19 NGC 5286 GlC 13 46 26.81 -51 22 27.3           ~ 485 0
20 NGC 5694 GlC 14 39 36.52 -26 32 18.0           ~ 323 0
21 NGC 5897 GlC 15 17 24.40 -21 00 36.4   10.16 8.52     ~ 424 0
22 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
23 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 499 0
24 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 408 0
25 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 399 0
26 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 780 0
27 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
28 NGC 6101 GlC 16 25 48.12 -72 12 07.9           ~ 337 0
29 NGC 6144 GlC 16 27 13.86 -26 01 24.6           ~ 268 0
30 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 835 0
31 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
32 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 736 0
33 NGC 6235 GlC 16 53 25.36 -22 10 38.8   11.99 7.20     ~ 208 0
34 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
35 GCl 50 GlC 16 59 51.1 -00 32 00   15.70       ~ 224 1
36 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 668 0
37 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 406 1
38 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 394 0
39 NGC 6352 GlC 17 25 29.11 -48 25 19.8           ~ 425 0
40 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 344 0
41 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 637 0
42 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
43 NGC 6496 GlC 17 59 03.68 -44 15 57.4   9.96       ~ 251 0
44 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 569 0
45 NGC 6535 GlC 18 03 50.51 -00 17 51.5     9.85     ~ 320 0
46 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 561 0
47 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 332 0
48 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 409 0
49 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
50 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
51 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
52 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 258 0
53 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 492 0
54 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 421 0
55 NGC 6712 GlC 18 53 04.32 -08 42 21.5           ~ 550 0
56 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1164 0
57 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 273 0
58 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 543 0
59 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
60 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 460 0
61 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 384 0
62 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 913 0
63 Cl Terzan 8 GlC 19 41 44.41 -33 59 58.1     11.54     ~ 357 0
64 GCl 114 GlC 19 45 14.40 -08 00 26.0     7.54     ~ 165 0
65 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
66 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 465 0
67 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
68 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1114 1
69 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1121 0
70 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 548 0

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