2011A&A...532A...8M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST18:47:33

2011A&A...532A...8M - Astronomy and Astrophysics, volume 532A, 8-8 (2011/8-1)

The two metallicity groups of the globular cluster M 22: a chemical perspective.

MARINO A.F., SNEDEN C., KRAFT R.P., WALLERSTEIN G., NORRIS J.E., DA COSTA G., MILONE A.P., IVANS I.I., GONZALEZ G., FULBRIGHT J.P., HILKER M., PIOTTO G., ZOCCALI M. and STETSON P.B.

Abstract (from CDS):

We present a detailed chemical composition analysis of 35 red giant stars in the globular cluster M22. High resolution spectra for this study were obtained at five observatories, and analyzed in a uniform manner. We have determined abundances of representative light proton-capture, α, Fe-peak and neutron-capture element groups. Our aim is to better understand the peculiar chemical enrichment history of this cluster, in which two stellar groups are characterized by a different content in iron, neutron capture elements Y, Zr and Ba, and α element Ca. The principal results of this study are: (i) substantial star-to-star metallicity scatter (-2.0≲[Fe/H]≲-1.6); (ii) enhancement of s-process/r-process neutron-capture abundance ratios in a fraction of giants, positively correlated with metallicity; (iii) sharp separation between the s-process-rich and s-process-poor groups by [La/Eu] ratio; (iv) possible increase of [Cu/Fe] ratios with increasing [Fe/H], suggesting that this element also has a significant s-process component; and (v) presence of Na-O and C-N anticorrelations in both the stellar groups.

Abstract Copyright:

Journal keyword(s): techniques: spectroscopic - stars: abundances - stars: Population II - globular clusters: individual: M22 (NGC 6656)

CDS comments: Table 2 star C is 2MASS J18361022-2348444.

Simbad objects: 44

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Number of rows : 44

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1241 0
2 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 815 0
3 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2997 0
4 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1771 0
5 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1677 0
6 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 694 1
7 Cl* NGC 6656 PG 9 * 18 35 50.0242183152 -23 57 41.742158725   13.052 11.356   9.567 A5 6 0
8 NGC 6656 3096 * 18 36 02.1972921625 -23 56 50.544415274   13.511 12.138   10.575 ~ 8 0
9 NGC 6656 2104 * 18 36 07.7195099173 -23 50 55.712831268   13.7458 12.3171   10.6334 ~ 10 0
10 NGC 6656 2031 * 18 36 09.9311083400 -23 52 52.923818144   13.436 11.927 11.41 11.927 ~ 23 0
11 NGC 6656 3052 * 18 36 10.1882767604 -23 54 22.152554850   13.2488 11.5217   9.6761 ~ 33 0
12 UCAC2 22317203 * 18 36 10.2172480767 -23 48 44.678612936   13.309 11.309 10.54 9.35 ~ 3 0
13 NGC 6656 3050 * 18 36 13.4362644015 -23 54 55.592010576   14.6701 13.4704 13.53 12.0023 ~ 8 0
14 NGC 6656 3012 * 18 36 14.2692059727 -23 54 31.406960324   13.236 11.540   9.723 ~ 23 0
15 NGC 6656 3047 * 18 36 14.8022221594 -23 55 16.020624677   13.699 12.385 11.78 10.848 ~ 7 0
16 NGC 6656 3014 * 18 36 15.1039678940 -23 54 54.907720434   12.40 10.93   9.145 ~ 19 0
17 NGC 6656 3015 * 18 36 15.6177474637 -23 55 01.582871876   13.057 11.362   9.484 ~ 12 0
18 NGC 6656 2096 * 18 36 17.2423670215 -23 54 11.608145049   13.134 11.604   9.879 ~ 7 0
19 NGC 6656 3003 * 18 36 17.5181798833 -23 54 26.585866022   12.8797 11.0304   9.0975 ~ 30 0
20 NGC 6656 3033 * 18 36 20.1391437766 -23 56 45.991829460   13.6269 12.2122   10.5598 ~ 13 0
21 NGC 6656 3025 * 18 36 20.1713484918 -23 55 54.281872326   13.9028 12.6644 12.72 11.1595 ~ 11 0
22 NGC 6656 3035 * 18 36 20.5186211731 -23 56 24.810143462   13.7089 12.3647   10.7539 ~ 15 0
23 NGC 6656 2001 * 18 36 23.8611651193 -23 52 44.253262421   13.585 12.043 11.45 10.367 ~ 6 0
24 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1217 0
25 NGC 6656 4020 * 18 36 25.9952547577 -23 55 58.728249983   13.6157 12.0413   10.3165 ~ 30 0
26 NGC 6656 1012 * 18 36 27.3693036370 -23 51 26.474728613   13.19 11.76   9.9282 ~ 26 0
27 NGC 6656 5002 * 18 36 27.9809288888 -23 55 02.192157343   13.260 11.498 10.85 9.674 ~ 6 0
28 NGC 6656 1037 * 18 36 30.0310137283 -23 53 50.466505420   13.450 12.008   10.372 ~ 8 0
29 NGC 6656 1036 * 18 36 30.0807162684 -23 53 37.864285417   13.342 11.931   10.320 ~ 9 0
30 NGC 6656 1027 * 18 36 30.5926867036 -23 52 48.898224318   13.54 12.37   10.8732 ~ 14 0
31 NGC 6656 1086 * 18 36 32.1423495932 -23 51 31.748404078   13.7589 12.2961   10.6084 ~ 21 0
32 NGC 6656 4059 * 18 36 32.1668277624 -23 56 04.353506045   13.4254 11.9082 11.20 10.19 ~ 18 0
33 NGC 6656 1085 * 18 36 32.8345501069 -23 51 11.229965665   13.7257 12.4310   10.8985 ~ 18 0
34 NGC 6656 4068 * 18 36 32.8908816595 -23 54 58.739865807   14.6746 13.4606 13.45 11.9562 ~ 5 0
35 NGC 6656 1092 * 18 36 33.2884944136 -23 52 32.860164519   13.141 11.561   9.828 ~ 27 0
36 NGC 6656 4076 * 18 36 35.4139921464 -23 54 40.351075042   13.709 12.299   10.790 ~ 8 0
37 NGC 6656 1080 * 18 36 36.0714826962 -23 50 16.492508059   13.9042 12.5003   10.9469 ~ 18 0
38 NGC 6656 4102 * 18 36 36.1972617629 -23 59 39.470209756   12.70 11.17   9.111 ~ 27 0
39 NGC 6656 1057 * 18 36 38.2771680393 -23 53 13.429932362   13.578 11.981   10.290 ~ 11 0
40 NGC 6656 1053 * 18 36 38.3695119608 -23 54 01.750016937   14.051 12.690   11.0746 ~ 19 0
41 NGC 6656 4097 * 18 36 41.0627598387 -23 58 19.487901177   12.799 10.9295   8.9453 ~ 37 0
42 NGC 6656 4088 * 18 36 44.9665251591 -23 54 57.777624181   13.718 12.228   10.608 ~ 8 0
43 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 898 0
44 NAME Galactic Bulge reg ~ ~           ~ 3391 0

    Equat.    Gal    SGal    Ecl

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2020.07.14-18:47:33

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