1999A&A...350..476R


Query : 1999A&A...350..476R

1999A&A...350..476R - Astronomy and Astrophysics, volume 350, 476-484 (1999/10-2)

Stroemgren photometry in globular clusters: M 55 & M 22.

RICHTER P., HILKER M. and RICHTLER T.

Abstract (from CDS):

We present Stroemgren CCD photometry for the two galactic globular clusters M 55 (NGC 6809) and M 22 (NGC 6656). We find average Stroemgren metallicities of -1.71±0.04dex for M 55 and -1.62±0.08dex for M 22. The determination of metal abundances in cluster giants with the Stroemgren m1 index in comparison with spectroscopic data from Briley et al. (1993) and Norris & Freeman (1982, 1983) shows that M 55 and M 22 have different distributions of cyanogen strengths. In M 55, no CN abundance variations are visible among the giant-branch stars. In striking contrast, a large dispersion of cyanogen strengths is seen in M 22. For M 22 we find patchily distributed variations in the foreground reddening of ΔE(B-V)≃0.07, which explain the colour dispersion among the giant-branch stars. There is no evidence for a spread in iron within M 22 since the variations in m1 are dominated by the large range in CN abundances, as already found by Anthony-Twarog et al. (1995PASP..107...32A). The difference between M 55 and M 22 may resemble the difference in integral CN band strength between M31 globular clusters and the galactic system. The colour-magnitude diagram of M 55 shows the presence of a population of 56 blue-straggler stars that are more centrally concentrated than the red giant-branch stars.

Abstract Copyright:

Journal keyword(s): Galaxy: globular clusters: individual: M 22 - Galaxy: globular clusters: individual: M 55 - stars: abundances - stars: blue stragglers

Simbad objects: 76

goto View the references in ADS

Number of rows : 76
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 NGC 6656 2092 * 18 36 06 -23 53.3   13.98 12.55     ~ 15 0
2 NGC 6656 2104 * 18 36 07.7194579176 -23 50 55.712368788   13.7458 12.3171   10.6334 ~ 10 0
3 NGC 6656 2042 * 18 36 08.66 -23 54 09.2   14.01 12.70     ~ 8 0
4 NGC 6656 2031 * 18 36 09.9313167888 -23 52 52.920794064   13.436 11.927 11.41 11.927 ~ 23 0
5 NGC 6656 3052 * 18 36 10.1880699192 -23 54 22.149836316   13.2488 11.5217   9.6761 ~ 33 0
6 NGC 6656 2030 * 18 36 11.1010284552 -23 52 33.955766508   13.57 12.19     ~ 7 0
7 NGC 6656 3086 * 18 36 12.1680692160 -23 56 53.068198560   13.83 12.54     ~ 8 0
8 NGC 6656 2098 * 18 36 12.2089602120 -23 52 35.266534032   13.69 12.31     ~ 7 0
9 NGC 6656 3012 * 18 36 14.2688646888 -23 54 31.402104804   13.236 11.540   9.723 ~ 23 0
10 NGC 6656 3047 * 18 36 14.8021476672 -23 55 16.019781312   13.699 12.385 11.78 10.848 ~ 7 0
11 NGC 6656 3014 * 18 36 15.1036106568 -23 54 54.906835572   12.40 10.93   9.145 ~ 19 0
12 NGC 6656 3015 * 18 36 15.6175331280 -23 55 01.580436012   13.057 11.362   9.484 ~ 12 0
13 NGC 6656 3045 * 18 36 16.7612805264 -23 55 41.103111432   14.09 12.86     ~ 5 0
14 NGC 6656 2023 * 18 36 16.8566850792 -23 52 13.646169480   13.89 12.63     ~ 11 0
15 NGC 6656 3003 * 18 36 17.5180920480 -23 54 26.583103224   12.8797 11.0304   9.0975 ~ 30 0
16 NGC 6656 3039 * 18 36 17.6820613728 -23 57 04.790756016   13.80 12.57     ~ 8 0
17 NGC 6656 3006 * 18 36 18.8147979816 -23 55 01.184349540   14.08 12.82     ~ 5 0
18 NGC 6656 3025 * 18 36 20.1714578232 -23 55 54.280178832   13.9028 12.6644 12.72 11.1595 ~ 11 0
19 NGC 6656 3035 * 18 36 20.5188035040 -23 56 24.807406452   13.7089 12.3647   10.7539 ~ 15 0
20 NGC 6656 2009 * 18 36 21.2079129792 -23 50 35.357838720   14.01 12.72     ~ 8 0
21 NGC 6656 2001 * 18 36 23.8609766832 -23 52 44.254659540   13.585 12.043 11.45 10.367 ~ 6 0
22 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1295 0
23 NGC 6656 4020 * 18 36 25.9951256040 -23 55 58.727655408   13.6157 12.0413   10.3165 ~ 30 0
24 NGC 6656 1110 * 18 36 26.2544088600 -23 52 32.049728040   14.07 12.80     ~ 5 0
25 NGC 6656 1098 * 18 36 26.2760149872 -23 51 48.397317444   13.67 12.40     ~ 8 0
26 NGC 6656 4031 * 18 36 26.5921770696 -23 57 53.392794480   13.85 12.58     ~ 8 0
27 NGC 6656 1011 * 18 36 26.7196189584 -23 51 22.818832848   14.17 12.85     ~ 8 0
28 NGC 6656 4024 * 18 36 27.1626074184 -23 56 20.096949912   14.98 12.59     ~ 12 0
29 NGC 6656 1012 * 18 36 27.3693642144 -23 51 26.472598488   13.19 11.76   9.9282 ~ 26 0
30 NGC 6656 1008 * 18 36 28.9184721384 -23 51 01.921190328   13.51 12.06     ~ 9 0
31 NGC 6656 1037 * 18 36 30.0312412200 -23 53 50.463927528   13.450 12.008   10.372 ~ 8 0
32 NGC 6656 1036 * 18 36 30.0808902216 -23 53 37.862908908   13.342 11.931   10.320 ~ 9 0
33 NGC 6656 1106 * 18 36 31.9883545368 -23 53 17.249520804   13.68 12.47     ~ 5 0
34 NGC 6656 1086 * 18 36 32.1422845440 -23 51 31.749823080   13.7589 12.2961   10.6084 ~ 21 0
35 NGC 6656 4059 * 18 36 32.1668419872 -23 56 04.352982504   13.4254 11.9082 11.20 10.19 ~ 18 0
36 NGC 6656 1085 * 18 36 32.8348019856 -23 51 11.228277816   13.7257 12.4310   10.8985 ~ 18 0
37 NGC 6656 1092 * 18 36 33.2884633608 -23 52 32.858872716   13.141 11.561   9.828 ~ 27 0
38 NGC 6656 4067 * 18 36 33.7254138624 -23 55 22.838440548   13.77 12.41     ~ 5 0
39 NGC 6656 1113 * 18 36 34.9979147208 -23 51 14.672266488   13.75 12.41     ~ 8 0
40 NGC 6656 4076 * 18 36 35.4140436264 -23 54 40.350386988   13.709 12.299   10.790 ~ 8 0
41 NGC 6656 1054 * 18 36 36.0021902280 -23 53 20.331701988   14.50 13.21     ~ 8 0
42 NGC 6656 1080 * 18 36 36.0715153344 -23 50 16.490712264   13.9042 12.5003   10.9469 ~ 18 0
43 NGC 6656 1051 * 18 36 36.3344949504 -23 54 02.266730532   13.96 12.70     ~ 8 0
44 NGC 6656 1057 * 18 36 38.2771221672 -23 53 13.429969728   13.578 11.981   10.290 ~ 11 0
45 NGC 6656 1053 * 18 36 38.3696670480 -23 54 01.747368108   14.051 12.690   11.0746 ~ 19 0
46 NGC 6656 1116 * 18 36 41.4920786688 -23 53 23.066342628   13.92 12.82     ~ 12 0
47 NGC 6656 1068 * 18 36 42.6811575336 -23 51 53.149825476   13.80 12.56     ~ 7 0
48 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 807 0
49 Cl* NGC 6809 SAW V1 RR* 19 40 22.4582510424 -30 58 25.249021176     14.07     ~ 6 0
50 NGC 6809 4501 * ~ ~   14.43 13.48     ~ 2 0
51 NGC 6809 4431 * ~ ~   14.36 13.38     ~ 2 0
52 NGC 6809 3526 * ~ ~   13.86 12.89     ~ 3 0
53 NGC 6809 3519 * ~ ~   14.79 13.87     ~ 2 0
54 NGC 6809 2307 * ~ ~   13.60 12.57     ~ 4 0
55 NGC 6809 3516 * ~ ~   14.48 13.54     ~ 2 0
56 NGC 6809 3402 * ~ ~   14.38 13.53     ~ 2 0
57 NGC 6809 2517 * ~ ~   14.05 13.12     ~ 2 0
58 NGC 6809 2510 * ~ ~   14.17 13.16     ~ 2 0
59 NGC 6809 1523 * ~ ~   14.14 13.19     ~ 2 0
60 NGC 6809 1404 * ~ ~   14.83 13.92     ~ 2 0
61 NGC 6809 1319 * ~ ~   14.02 12.98     ~ 4 0
62 NGC 6809 4523 * ~ ~   13.57 12.58     ~ 3 0
63 NGC 6809 4403 * ~ ~   13.72 12.71     ~ 3 0
64 NGC 6809 3509 * ~ ~   13.51 12.40     ~ 3 0
65 NGC 6809 3409 * ~ ~   13.86 12.90     ~ 4 0
66 NGC 6809 2318 * ~ ~   13.93 12.88     ~ 4 0
67 NGC 6809 1518 * ~ ~   13.11 11.84     ~ 9 0
68 NGC 6809 1418 * ~ ~   14.13 13.14     ~ 4 0
69 NGC 6809 4422 * ~ ~   13.51 12.37     ~ 3 0
70 NGC 6809 4323 * ~ ~   13.99 12.96     ~ 2 0
71 NGC 6809 2437 * ~ ~   13.06 11.77     ~ 6 0
72 NGC 6809 1401 * ~ ~   13.26 12.01     ~ 6 0
73 NGC 6809 1317 * ~ ~   13.16 11.92     ~ 7 0
74 NGC 6809 4505 * ~ ~   12.76 11.39     ~ 11 0
75 NGC 6809 2502 * ~ ~   13.09 11.79     ~ 12 0
76 NGC 6809 3321 * ~ ~     11.988     ~ 1 0

To bookmark this query, right click on this link: simbad:objects in 1999A&A...350..476R and select 'bookmark this link' or equivalent in the popup menu


2022.05.24-08:15:42

© Université de Strasbourg/CNRS

    • Contact