2001A&A...375...30M

Query : 2001A&A...375...30M

2001A&A...375...30M - Astronomy and Astrophysics, volume 37530-39 (2001/8-3)

Red giants in open clusters. IX. NGC 2324, 2818, 3960 and 6259.

MERMILLIOD J.-C., CLARIA J.J., ANDERSEN J., PIATTI A.E. and MAYOR M.

Abstract (from CDS):

We present accurate radial velocities and photoelectric UBV photometry for 73 and 57 red-giant candidates, respectively, in the intermediate-age open clusters NGC 2324, 2818, 3960 and 6259. These data confirm the membership of 47 stars, 12 of which (26%) are spectroscopic binaries; three preliminary orbits have been determined in NGC 3960. From Washington photometry of 8 red giant members, the metallicity of NGC 6259 is found to be [Fe/H]=0.06±0.08. At the age of these clusters, most of the red giants are observed in the core-helium (clump) burning phase, the general morphology of which is well reproduced by theoretical models with convective overshooting. However, a number of bona fide cluster giant members are found significantly to the red of the isochrones fitting the rest of the CMD of these and a few other clusters. Some of these stars are binaries, but others seem to be single. In either case, their red colours and/or low luminosities remain unexplained by current stellar evolution theory.

Abstract Copyright: ∼

Journal keyword(s): cluster: open - individual: NGC 2324, NGC 2818, NGC 3960, NGC 6259 - binary: spectroscopic - star: evolution - star: red giant

VizieR on-line data: <Available at CDS (J/A+A/375/30): table1.dat>

Simbad objects: 85

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Number of rows : 85
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 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
2 NGC 2324 103 * 07 03 57.9721399848 +01 04 17.354069220   14.31 13.213     ~ 3 0
3 2MASS J07040031+0058168 RG* 07 04 00.3156314091 +00 58 16.876553031   14.023 12.43 11.96 11.015 ~ 33 0
4 2MASS J07040114+0106040 RG* 07 04 01.1471609808 +01 06 04.008009456   14.347 13.351 12.97 12.216 ~ 31 0
5 2MASS J07040229+0102214 RG* 07 04 02.2991793720 +01 02 21.465124008   13.96 13.887     ~ 12 0
6 2MASS J07040376+0100148 RG* 07 04 03.7646782104 +01 00 14.807992464   14.444 13.425 12.97 12.267 ~ 29 0
7 NGC 2324 19 * 07 04 05.3159289576 +01 03 00.195764328   14.572 13.482     ~ 8 0
8 NGC 2324 121 * 07 04 05.8786541294 +01 00 35.231334020   14.625 13.570     ~ 4 0
9 NGC 2324 91 SB* 07 04 08.2230058488 +01 05 18.442564368   14.312 13.291   12.144 ~ 18 0
10 NGC 2324 OpC 07 04 08.5 +01 02 50   8.83 8.4     ~ 174 0
11 2MASS J07041139+0059415 RG* 07 04 11.4029262984 +00 59 41.405356716   14.12 12.876     ~ 11 0
12 NGC 2324 67 RG* 07 04 13.5452497896 +01 02 05.151154704   14.635 13.615   13.938 ~ 31 0
13 NGC 2324 134 * 07 04 14.7616693728 +01 01 06.704253768   14.374 13.332 12.90 12.201 ~ 15 0
14 NGC 2324 86 * 07 04 14.7704817144 +01 04 49.587542328   14.861 13.816     ~ 3 0
15 NGC 2324 136 * 07 04 16.1655848640 +01 01 13.459124928   13.731 12.508   11.242 ~ 29 0
16 NGC 2324 75 HB* 07 04 18.7923847704 +01 02 36.709874880   13.669 12.360     ~ 12 0
17 NGC 2324 147 HB* 07 04 22.0237138248 +01 04 34.121164512   14.368 13.361     ~ 15 0
18 NGC 2324 280 * 07 04 22.5069778776 +01 06 16.539559920   14.863 13.915   12.814 ~ 11 0
19 NGC 2324 276 * 07 04 26.6999003064 +01 00 14.730883344   13.7 12.93     ~ 2 0
20 NGC 2660 OpC 08 42 40.0 -47 11 59   9.05 8.8     ~ 164 0
21 NGC 2818 3034 * 09 15 52.3476632520 -36 30 44.012545380   14.258 13.125     ~ 3 0
22 NGC 2818 3035 * 09 15 54.2675893944 -36 30 50.242348656   14.381 13.346     ~ 10 0
23 NGC 2818 2038 * 09 15 56.4967116696 -36 40 51.616911648   14.623 13.568     ~ 7 0
24 NGC 2818 1053 * 09 15 59.4344608392 -36 34 56.555434380   14.212 13.325     ~ 9 0
25 NGC 2818 1044 * 09 16 02.9483951808 -36 34 34.500342540   14.754 13.745     ~ 9 0
26 NGC 2818 2035 * 09 16 03.3567526200 -36 40 18.837841008   14.157 13.056     ~ 3 0
27 Cl* NGC 2818 MMU 296 * 09 16 03.4772002128 -36 39 49.691962656   14.62 13.600     ~ 7 0
28 Cl* NGC 2818 MMU 297 * 09 16 03.8606165040 -36 39 50.840742168   14.44 13.400     ~ 8 0
29 NGC 2818 1063 * 09 16 04.5711592512 -36 35 49.278662412   14.853 13.850     ~ 9 0
30 NGC 2818 1126 * 09 16 07.5896647320 -36 40 09.860962512   14.711 13.542     ~ 4 0
31 NGC 2818 1069 * 09 16 08.8619262192 -36 36 48.260967048   14.702 13.704     ~ 9 0
32 Cl* NGC 2818 MMU 138 * 09 16 10.6593213144 -36 36 14.147437068   14.64 13.680     ~ 8 0
33 NGC 2818 OpC 09 16 10.8 -36 37 09           ~ 108 1
34 NGC 2818 1004 SB* 09 16 12.5845036992 -36 34 46.089263352   13.24 12.09     ~ 13 0
35 NGC 2818 1135 * 09 16 12.6158310024 -36 39 42.001080084   14.866 13.854     ~ 9 0
36 NGC 2818 1003 * 09 16 14.5780095720 -36 34 27.301805832   14.549 13.398     ~ 4 0
37 NGC 2818 1161 * 09 16 17.6096244288 -36 37 53.081929092   14.24 12.73     ~ 6 0
38 NGC 2818 1156 * 09 16 18.9274281960 -36 38 08.398769280   14.913 13.886     ~ 9 0
39 NGC 2818 1159 * 09 16 20.9774300328 -36 37 53.788419408   13.655 12.547     ~ 4 0
40 NGC 2818 2142 * 09 16 27.8020971408 -36 36 24.081832008   14.808 13.794     ~ 8 0
41 NGC 2818 2130 * 09 16 30.9166982112 -36 34 20.546646132   13.868 12.498     ~ 13 0
42 NGC 2818 2139 * 09 16 34.8422898792 -36 36 00.182095452   13.93 12.910     ~ 3 0
43 NGC 2818 2147 * 09 16 36.0302107152 -36 37 47.763793776   14.632 13.406     ~ 3 0
44 NGC 2818 3074 * 09 16 37.8278325408 -36 32 59.777133720   14.91 13.657     ~ 3 0
45 NGC 3960 18 * 11 50 21.9394951368 -55 42 23.303395764   14.27 12.65     ~ 4 0
46 NGC 3960 91 SB* 11 50 26.0009298144 -55 39 45.720916128   14.49 13.32     ~ 8 0
47 NGC 3960 102 * 11 50 26.1491915088 -55 43 51.797093448   13.2 11.500     ~ 6 0
48 NGC 3960 28 * 11 50 26.7644632512 -55 40 28.208115516   14.21 13.01     ~ 19 0
49 NGC 3960 24 * 11 50 28.1888614128 -55 41 36.911036040   14.53 13.28     ~ 11 0
50 NGC 3960 43 * 11 50 33.1548139061 -55 42 36.354617674   14.90 13.57     ~ 7 0
51 NGC 3960 275 SB* 11 50 33.1788492552 -55 38 52.657768356   14.8 13.450     ~ 10 0
52 NGC 3960 41 * 11 50 36.0489413352 -55 42 05.646712068   14.45 13.15     ~ 18 0
53 NGC 3960 OpC 11 50 36.4 -55 40 40   9.07 8.3     ~ 152 0
54 NGC 3960 44 * 11 50 37.3438774680 -55 41 02.900203944   13.87 12.67     ~ 9 0
55 NGC 3960 50 SB* 11 50 37.6232392608 -55 40 15.155170896   14.30 13.11     ~ 18 0
56 NGC 3960 286 * 11 50 38.1088530072 -55 39 44.497527588   14.37 13.170     ~ 13 0
57 NGC 3960 47 * 11 50 41.3319378624 -55 40 53.677052508   14.82 13.65     ~ 10 0
58 NGC 3960 297 * 11 50 44.3971608360 -55 38 44.146567356   13.75 12.340     ~ 5 0
59 NGC 3960 55 * 11 50 50.4062342160 -55 40 11.305589232   14.86 13.55     ~ 5 0
60 NGC 6259 4027 * 17 00 24.2421810144 -44 41 47.327130816   14.329 12.591     ~ 13 0
61 Cl* NGC 6259 MMU 1335 * 17 00 27.0462697200 -44 43 09.258487680   14.181 12.444     ~ 12 0
62 NGC 6259 1013 * 17 00 28.2444218856 -44 38 53.669609304   14.23 12.47     ~ 13 0
63 Cl* NGC 6259 MMU 1220 * 17 00 29.5294765152 -44 41 15.677172312   14.386 12.576     ~ 3 0
64 NGC 6259 4024 * 17 00 29.9306963016 -44 41 42.911550204   13.966 12.218     ~ 13 0
65 NGC 6259 1035 * 17 00 32.6218765320 -44 37 00.830606808   12.838 11.791     ~ 4 0
66 NGC 6259 4039 * 17 00 34.7766206760 -44 43 01.813700856   13.84 11.76     ~ 5 0
67 NGC 6259 1030 * 17 00 36.0639171888 -44 37 25.173312024   14.248 12.462     ~ 12 0
68 NGC 6259 4014 * 17 00 38.5634129664 -44 41 33.284171832   14.61 12.80     ~ 14 0
69 Cl* NGC 6259 APT 4101 * 17 00 38.59 -44 41 33.3     12.202     ~ 2 0
70 NGC 6259 2046 * 17 00 45.5157415656 -44 37 21.355214052   12.85 11.988     ~ 6 0
71 NGC 6259 3001 * 17 00 46.4521587384 -44 40 41.545087608   13.999 12.202     ~ 12 1
72 NGC 6259 2029 * 17 00 46.6795567944 -44 38 22.527920904   14.042 12.303     ~ 12 0
73 NGC 6259 OpC 17 00 47.5 -44 40 54   8.85 8.0     ~ 92 0
74 NGC 6259 3017 * 17 00 51.4683019704 -44 41 29.663331216   14.30 12.66     ~ 12 0
75 Cl* NGC 6259 MMU 2209 * 17 00 53.8921802187 -44 43 37.216620385   14.669 12.903     ~ 13 0
76 NGC 6259 2014 * 17 00 55.6142320200 -44 40 05.233988712   14.356 12.938     ~ 4 0
77 Cl* NGC 6259 APT 2335 * 17 00 56.60 -44 44 46.8     13.397     ~ 2 0
78 Cl* NGC 6259 MMU 2221 * 17 00 56.75 -44 42 37.4   14.741 13.242     ~ 3 0
79 NGC 6259 3006 * 17 00 57.0896389920 -44 40 43.132407168   15.236 14.522     ~ 8 0
80 NGC 6259 3007 * 17 00 58.3242352776 -44 40 54.225394248   14.318 12.621     ~ 12 0
81 NGC 6259 2024 * 17 01 03.61 -44 38 32.1     13.938     ~ 2 0
82 Cl* NGC 6259 APT 3347 * 17 01 05.60 -44 38 42.4     13.945     ~ 2 0
83 Cl* NGC 6259 MMU 3351 * 17 01 08.7629109120 -44 39 34.523203572   14.381 12.909     ~ 3 0
84 Cl* NGC 6259 MMU 2301 * 17 01 09.6062377608 -44 41 22.005425400   12.58 11.12     ~ 9 0
85 NGC 7789 OpC 23 57 19.4 +56 43 28   7.68 6.7     ~ 575 0

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