2021A&A...648A..18M


Query : 2021A&A...648A..18M

2021A&A...648A..18M - Astronomy and Astrophysics, volume 648A, 18-18 (2021/4-1)

Infrared photometry and CaT spectroscopy of globular cluster M 28 (NGC 6626).

MONI BIDIN C., MAURO F., CONTRERAS RAMOS R., ZOCCALI M., REINARZ Y., MOYANO M., GONZALEZ-DIAZ D., VILLANOVA S., CARRARO G., BORISSOVA J., CHENE A.-N., COHEN R.E., GEISLER D., KURTEV R. and MINNITI D.

Abstract (from CDS):


Context. Recent studies show that the inner Galactic regions host genuine bulge globular clusters, but also halo intruders, complex remnants of primordial building blocks, and objects likely accreted during major merging events.
Aims. In this study we focus on the properties of M 28, a very old and massive cluster currently located in the Galactic bulge.
Methods. We analysed wide-field infrared photometry collected by the VVV survey, VVV proper motions, and intermediate-resolution spectra in the calcium triplet range for 113 targets in the cluster area.
Results. Our results in general confirm previous estimates of the cluster properties available in the literature. We find no evidence of differences in metallicity between cluster stars, setting an upper limit of Δ[Fe/H]<0.08dex to any internal inhomogeneity. We confirm that M 28 is one of the oldest objects in the Galactic bulge (13-14Gyr). From this result and the literature data, we find evidence of a weak age-metallicity relation among bulge globular clusters that suggests formation and chemical enrichment. In addition, wide-field density maps show that M 28 is tidally stressed and that it is losing mass into the general bulge field.
Conclusions. Our study indicates that M 28 is a genuine bulge globular cluster, but its very old age and its mass loss suggest that this cluster could be the remnant of a larger structure, possibly a primeval bulge building block.

Abstract Copyright: © ESO 2021

Journal keyword(s): Galaxy: bulge - globular clusters: individual: M28 - globular clusters: general

Nomenclature: Table A.1: [MMC2021] NNN N=113 among (Nos 4-125).

Status at CDS : All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 134

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Number of rows : 134
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 C 1235-509 GlC 12 38 40.20 -51 09 01.0           ~ 346 0
2 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3253 0
3 NGC 6304 GlC 17 14 32.25 -29 27 43.3   10.33 9.03     ~ 330 0
4 ESO 455-11 GlC 17 31 05.20 -29 58 54.0           ~ 154 0
5 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13100 0
6 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 766 1
7 NGC 6440 GlC 17 48 52.67 -20 21 34.5   12.01 10.10     ~ 508 1
8 NGC 6522 GlC 18 03 34.08 -30 02 02.3   10.68 9.48     ~ 497 1
9 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 500 0
10 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 574 0
11 NGC 6558 GlC 18 10 18.38 -31 45 48.6   12.39 11.29     ~ 208 0
12 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 216 0
13 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 829 1
14 [MMC2021] 112 * 18 23 42.3 -24 52 00           ~ 1 0
15 [MMC2021] 117 * 18 23 43.8 -24 54 21           ~ 1 0
16 [MMC2021] 101 * 18 23 44.3 -24 54 43           ~ 1 0
17 [MMC2021] 114 * 18 23 48.6 -24 52 31           ~ 1 0
18 [MMC2021] 107 * 18 23 48.7 -24 58 22           ~ 1 0
19 [MMC2021] 102 * 18 23 51.8 -24 54 31           ~ 1 0
20 [MMC2021] 111 * 18 23 57.5 -24 52 09           ~ 1 0
21 [MMC2021] 90 * 18 23 57.8 -24 58 49           ~ 1 0
22 [MMC2021] 125 * 18 23 58.0 -24 48 13           ~ 1 0
23 [MMC2021] 94 * 18 23 59.7 -25 01 30           ~ 1 0
24 [MMC2021] 113 * 18 24 00.0 -24 52 26           ~ 1 0
25 [MMC2021] 109 * 18 24 01.8 -24 50 48           ~ 1 0
26 [MMC2021] 116 * 18 24 02.2 -24 53 36           ~ 1 0
27 [MMC2021] 119 * 18 24 04.7 -24 47 24           ~ 1 0
28 [MMC2021] 104 * 18 24 05.5 -24 55 11           ~ 1 0
29 [MMC2021] 89 * 18 24 05.8 -24 56 40           ~ 1 0
30 [MMC2021] 98 * 18 24 07.8 -25 03 00           ~ 1 0
31 [MMC2021] 110 * 18 24 10.4 -24 51 21           ~ 1 0
32 [MMC2021] 118 * 18 24 11.2 -24 47 31           ~ 1 0
33 [MMC2021] 92 * 18 24 12.6 -24 56 58           ~ 1 0
34 [MMC2021] 108 * 18 24 13.0 -24 55 02           ~ 1 0
35 [MMC2021] 123 * 18 24 13.1 -24 50 04           ~ 1 0
36 [MMC2021] 11 * 18 24 17.0 -24 48 25           ~ 1 0
37 [MMC2021] 99 * 18 24 18.1 -24 59 25           ~ 1 0
38 [MMC2021] 4 * 18 24 18.6 -24 43 47           ~ 1 0
39 [MMC2021] 81 * 18 24 21.0 -25 04 17           ~ 1 0
40 [MMC2021] 100 * 18 24 22.3 -24 58 23           ~ 1 0
41 [MMC2021] 97 * 18 24 23.5 -24 57 15           ~ 1 0
42 NGC 6626 2128 * 18 24 23.5093159608 -24 51 55.625998896   15.51 14.02     ~ 2 0
43 NGC 6626 2121 * 18 24 23.7335476296 -24 52 33.786730488   14.95 14.46     ~ 3 0
44 [MMC2021] 20 * 18 24 24.1 -24 43 36           ~ 1 0
45 [MMC2021] 19 * 18 24 25.6 -24 45 15           ~ 1 0
46 [MMC2021] 93 * 18 24 25.9 -24 53 57           ~ 1 0
47 [MMC2021] 85 * 18 24 26.4 -24 56 31           ~ 1 0
48 NGC 6626 1123 * 18 24 26.5015425048 -24 51 47.379038472   15.89 14.54     ~ 2 0
49 NGC 6626 1131 * 18 24 26.6372523600 -24 51 12.564327780   15.11 13.38     ~ 4 0
50 [MMC2021] 6 * 18 24 26.7 -24 50 22           ~ 1 0
51 [MMC2021] 95 * 18 24 27.6 -24 54 01           ~ 1 0
52 [MMC2021] 82 * 18 24 27.7 -24 58 42           ~ 1 0
53 [MMC2021] 86 * 18 24 27.7 -24 56 26           ~ 1 0
54 [MMC2021] 18 * 18 24 27.7 -24 40 41           ~ 1 0
55 [MMC2021] 17 * 18 24 27.9 -24 44 17           ~ 1 0
56 2MASS J18242792-2451160 RG* 18 24 27.9264931392 -24 51 16.040466504   16.07 14.64     ~ 3 0
57 [MMC2021] 16 * 18 24 29.5 -24 43 19           ~ 1 0
58 [MMC2021] 105 * 18 24 29.9 -24 52 31           ~ 1 0
59 [MMC2021] 106 * 18 24 29.9 -24 52 18           ~ 1 0
60 [MMC2021] 8 * 18 24 30.2 -24 51 05           ~ 1 0
61 [MMC2021] 91 * 18 24 30.8 -24 52 36           ~ 1 0
62 2MASS J18243130-2452471 RG* 18 24 31.2992347056 -24 52 47.165203740           ~ 2 0
63 2MASS J18243140-2451136 RG* 18 24 31.4020658664 -24 51 13.654680984           ~ 2 0
64 [MMC2021] 15 * 18 24 31.8 -24 48 29           ~ 1 0
65 [MMC2021] 88 * 18 24 32.6 -24 54 16           ~ 1 0
66 [MMC2021] 80 * 18 24 32.8 -25 00 03           ~ 1 0
67 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 720 0
68 [MMC2021] 27 * 18 24 32.9 -24 48 43           ~ 1 0
69 [MMC2021] 14 * 18 24 33.0 -24 48 10           ~ 1 0
70 [MMC2021] 87 * 18 24 33.1 -24 58 10           ~ 1 0
71 [MMC2021] 71 * 18 24 33.4 -24 55 48           ~ 1 0
72 [MMC2021] 66 * 18 24 33.4 -24 52 40           ~ 1 0
73 NGC 6626 2076 * 18 24 33.6388534584 -24 54 39.750065244   16.01 14.57     ~ 3 0
74 NGC 6626 1080 * 18 24 33.9166622184 -24 54 07.464628512           ~ 2 0
75 [MMC2021] 79 * 18 24 34.4 -24 53 16           ~ 1 0
76 [MMC2021] 84 * 18 24 34.5 -24 55 38           ~ 1 0
77 [MMC2021] 37 * 18 24 34.9 -24 51 45           ~ 1 0
78 [MMC2021] 34 * 18 24 35.0 -24 52 04           ~ 1 0
79 2MASS J18243590-2452090 RG* 18 24 35.909 -24 52 09.09           ~ 2 0
80 [MMC2021] 74 * 18 24 36.2 -24 54 47           ~ 1 0
81 [MMC2021] 72 * 18 24 36.3 -24 57 24           ~ 1 0
82 [MMC2021] 22 * 18 24 36.7 -24 50 42           ~ 1 0
83 NGC 6626 2012 * 18 24 36.7326012048 -24 50 14.839950084   16.22 14.77     ~ 3 0
84 [MMC2021] 62 * 18 24 36.9 -24 52 42           ~ 1 0
85 [MMC2021] 39 * 18 24 36.9 -24 52 02           ~ 1 0
86 [MMC2021] 12 * 18 24 37.0 -24 45 55           ~ 1 0
87 Cl* NGC 6626 ALC N * 18 24 37.1696001336 -24 44 33.124250688   15.68 14.12     ~ 2 0
88 [MMC2021] 36 * 18 24 37.4 -24 49 07           ~ 1 0
89 [MMC2021] 69 * 18 24 37.7 -24 53 08           ~ 1 0
90 [MMC2021] 26 * 18 24 37.7 -24 48 52           ~ 1 0
91 NGC 6626 1012 * 18 24 37.8730244904 -24 50 50.858892528   15.76 14.34     ~ 2 0
92 [MMC2021] 23 * 18 24 38.7 -24 50 21           ~ 1 0
93 [MMC2021] 73 * 18 24 39.0 -24 59 02           ~ 1 0
94 2MASS J18243900-2451077 RG* 18 24 39.0003651360 -24 51 07.832647656   16.58 14.10     ~ 3 0
95 NGC 6626 1047 * 18 24 39.1582671840 -24 52 40.303106220   15.48 13.96     ~ 2 0
96 [MMC2021] 78 * 18 24 39.4 -24 54 52           ~ 1 0
97 [MMC2021] 25 * 18 24 41.1 -24 48 25           ~ 1 0
98 [MMC2021] 59 * 18 24 41.3 -24 54 18           ~ 1 0
99 [MMC2021] 60 * 18 24 41.5 -24 54 34           ~ 1 0
100 [MMC2021] 35 * 18 24 41.8 -24 49 27           ~ 1 0
101 NGC 6626 2036 * 18 24 42.0288819288 -24 51 30.167159400   15.63 14.13     ~ 3 0
102 NGC 6626 2048 * 18 24 42.0305384640 -24 52 20.585558352   16.52 15.08     ~ 2 0
103 [MMC2021] 28 * 18 24 42.2 -24 45 25           ~ 1 0
104 [MMC2021] 63 * 18 24 43.3 -24 56 17           ~ 1 0
105 NGC 6626 2043 * 18 24 43.3052500896 -24 51 49.718172816   14.94 14.54     ~ 3 0
106 [MMC2021] 77 * 18 24 45.6 -24 58 44           ~ 1 0
107 [MMC2021] 31 * 18 24 46.7 -24 48 53           ~ 1 0
108 [MMC2021] 54 * 18 24 47.3 -24 53 19           ~ 1 0
109 [MMC2021] 43 * 18 24 47.6 -24 50 42           ~ 1 0
110 [MMC2021] 70 * 18 24 47.7 -24 58 12           ~ 1 0
111 [MMC2021] 45 * 18 24 49.4 -24 52 08           ~ 1 0
112 [MMC2021] 65 * 18 24 49.8 -24 56 29           ~ 1 0
113 [MMC2021] 52 * 18 24 50.7 -24 52 45           ~ 1 0
114 [MMC2021] 24 * 18 24 51.5 -24 44 03           ~ 1 0
115 [MMC2021] 67 * 18 24 51.8 -24 54 00           ~ 1 0
116 [MMC2021] 50 * 18 24 51.9 -24 54 43           ~ 1 0
117 [MMC2021] 68 * 18 24 52.7 -24 55 12           ~ 1 0
118 [MMC2021] 61 * 18 24 53.7 -24 56 12           ~ 1 0
119 [MMC2021] 53 * 18 24 54.0 -24 54 13           ~ 1 0
120 [MMC2021] 49 * 18 24 56.3 -24 50 09           ~ 1 0
121 [MMC2021] 40 * 18 24 56.8 -24 48 14           ~ 1 0
122 [MMC2021] 21 * 18 24 57.4 -24 44 21           ~ 1 0
123 [MMC2021] 29 * 18 24 57.9 -24 50 19           ~ 1 0
124 [MMC2021] 58 * 18 25 04.1 -24 53 25           ~ 1 0
125 [MMC2021] 42 * 18 25 06.4 -24 52 04           ~ 1 0
126 [MMC2021] 44 * 18 25 12.1 -24 50 28           ~ 1 0
127 [MMC2021] 57 * 18 25 21.2 -24 55 03           ~ 1 0
128 M 69 GlC 18 31 23.10 -32 20 53.1   9.32 8.31     ~ 438 1
129 NGC 6652 GlC 18 35 45.63 -32 59 26.6   10.64 9.75     ~ 393 0
130 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1300 0
131 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1003 0
132 NGC 6717 GlC 18 55 06.04 -22 42 05.3   11.29 10.35     ~ 222 0
133 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 469 0
134 NAME Galactic Bulge reg ~ ~           ~ 3901 0

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2022.08.18-04:27:55

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