1995PASP..107.1215T

Query : 1995PASP..107.1215T

1995PASP..107.1215T - Publ. Astron. Soc. Pac., 107, 1215-1225 (1995/December-0)

Composition and evolution patterns in the old open cluster Melotte 66: photoelectric (U)BV(RI) photometry of 71 stars.

TWAROG B.A., ANTHONY-TWAROG B.J. and HAWARDEN T.G.

Abstract (from CDS):

New photoelectirc (U)BV(RI) data for 71 red giants and turnoff stars in the old open cluster Melotte 66 are presented and discussed. The photometry confirms the broad color range exhibited by giants at and above the level of the clump. UBV analysis of turnoff stars yields [Fe/H]= -53 ± 0.08 assuming a cluster of E(B-V) = 0.16 ± 0.02. A nearly identical [Fe/H] is implied by the giants' ultraviolet excesses, but with a significantly higher dispersion.

Previously published CCD uby data has been transformed to the BV system to permit an analysis of the cluster color-magnitude diagram with reference to isochrones which incorporate convective core overshoot. Main sequence fits imply an age of 4.5 ± 0.5 Gyr and an apparent modulus (m-M) = 13.75. Further support for these reddening and distance values is provided by comparison of the red giant clump to other old open clusters. The giant branch of Mel 66 is shown to extend to an extreme in both luminosity and color currently matched only by old open cluster NGC 6791 and Cr 261.


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Journal keyword(s):

CDS comments: table 1: objects format EN and NNNNN not in SIMBAD

Simbad objects: 66

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Number of rows : 66
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 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
3 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
4 NGC 2243 OpC 06 29 34.3 -31 16 58   10.12 9.4     ~ 298 0
5 Cl Melotte 66 1321 RB? 07 25 47.8431077640 -47 36 50.150061468   14.635 13.101 12.90 11.67 ~ 9 0
6 Cl Melotte 66 4326 * 07 25 50.9451746448 -47 44 08.172944268   14.063 12.744 12.47 11.59 ~ 9 0
7 Cl Melotte 66 4205 * 07 25 52.3998434376 -47 41 36.757393296   15.681 14.507 14.292   ~ 6 0
8 Cl Melotte 66 4206 * 07 25 54.3501280440 -47 40 52.693475772   11.975 10.815     ~ 3 0
9 Cl Melotte 66 1230 * 07 25 57.7054922448 -47 38 37.685049396   16.94 15.92     ~ 2 0
10 Cl Melotte 66 1126 * 07 26 01.9616341824 -47 39 24.756930180   17.32 16.68     ~ 4 0
11 Cl Melotte 66 4118 RB? 07 26 02.5076412696 -47 40 55.930815012     14.6     ~ 14 0
12 Cl Melotte 66 1123 * 07 26 02.9152435848 -47 39 53.607572352   16.96 16.29     ~ 1 0
13 Cl Melotte 66 4121 * 07 26 03.1410481872 -47 42 02.027972052   18.17 17.62     ~ 4 0
14 Cl Melotte 66 4120 * 07 26 03.7916528664 -47 41 28.222539684   17.600 16.950     ~ 1 0
15 Cl Melotte 66 4230 RB? 07 26 04.4291017656 -47 44 13.303656168   15.640 14.8     ~ 2 0
16 Cl Melotte 66 4229 * 07 26 05.4759533280 -47 44 05.012170584   15.156 13.676 13.388   ~ 11 0
17 Cl Melotte 66 1121 * 07 26 05.6201595264 -47 40 01.957105308   17.45 16.84     ~ 4 0
18 Cl Melotte 66 4112 * 07 26 07.9039632792 -47 41 26.084122188   17.240 16.560     ~ 4 0
19 Cl Melotte 66 1130 * 07 26 08.9820169896 -47 39 43.818549876   17.15 16.50     ~ 4 0
20 Cl Melotte 66 4264 * 07 26 11.3156673552 -47 43 50.597074092   15.86 14.72     ~ 4 0
21 Cl Melotte 66 4151 RG* 07 26 12.0671119656 -47 43 24.765309264   14.249 12.668 12.277 11.00 ~ 30 0
22 Cl* Melotte 66 KJF 2225 RB? 07 26 12.3961788120 -47 47 29.079398220   14.58 13.2     ~ 8 0
23 Cl Melotte 66 1104 * 07 26 12.6970477536 -47 40 41.975349204   17.62 16.98     ~ 4 0
24 Cl Melotte 66 1135 RB? 07 26 12.8598521592 -47 39 25.010375148   15.502 14.4     ~ 6 0
25 Cl* Melotte 66 KJF 2187 RB? 07 26 12.9638267760 -47 41 53.570035536   15.67 14.6     ~ 6 0
26 Cl Melotte 66 4103 * 07 26 14.6163462120 -47 40 55.515849132   17.150 16.610     ~ 4 0
27 Cl Melotte 66 4355 RB? 07 26 15.1526200392 -47 46 21.652038336   15.947 14.9     ~ 5 0
28 Cl Melotte 66 1101 * 07 26 16.6740857448 -47 40 16.689568944   17.92 17.23     ~ 4 0
29 Cl Melotte 66 1203 RB? 07 26 16.7871843792 -47 37 21.963838152   15.300 14.2     ~ 6 0
30 Cl Melotte 66 2142 * 07 26 19.0701045336 -47 38 37.394368296   17.12 16.50     ~ 4 0
31 Cl Melotte 66 OpC 07 26 19.2 -47 41 14   8.73       ~ 213 0
32 Cl Melotte 66 2107 * 07 26 19.8971855928 -47 40 15.854429964   15.627 14.462 14.413 13.52 ~ 17 0
33 2MASS J07262179-4736284 LP* 07 26 21.7961679840 -47 36 28.381561272   15.64 13.80     M3 6 0
34 UCAC4 212-013246 RB? 07 26 22.0542148848 -47 39 28.018549836   14.681 13.170 12.807 11.53 ~ 16 0
35 GEN# +5.20662261 RB? 07 26 23.0286559992 -47 37 42.182803884   14.85 13.6   12.33 ~ 8 0
36 V* V659 Pup Ro* 07 26 23.6999909664 -47 42 01.957539708   15.93 14.7   13.3 ~ 8 0
37 Cl Melotte 66 2150 * 07 26 24.3543928608 -47 38 02.898547584   17.150 16.600     ~ 4 0
38 Cl Melotte 66 3213 * 07 26 24.7913211528 -47 44 41.844443748   15.57 14.42     ~ 4 0
39 Cl Melotte 66 3170 * 07 26 26.3622398880 -47 43 14.753798760   17.570 16.890     ~ 4 0
40 Cl* Melotte 66 KJF 1419 RB? 07 26 26.6608492344 -47 37 55.807878000   15.470 14.48   13.29 ~ 16 0
41 Cl Melotte 66 2120 RB? 07 26 29.4051843168 -47 40 36.209331876   15.547 14.4     ~ 6 0
42 UCAC4 212-013296 RB? 07 26 30.5355580248 -47 41 43.883907072   15.277 14.012 13.853 12.77 ~ 12 0
43 Cl Melotte 66 3121 RB? 07 26 30.8318925864 -47 40 44.345082144   15.486 14.4     ~ 6 0
44 Cl Melotte 66 3235 * 07 26 34.5891912456 -47 42 47.162670264   15.780 14.626 14.428 13.39 ~ 17 0
45 Cl Melotte 66 2238 * 07 26 36.1938138624 -47 37 51.886380000   17.25 16.30     ~ 4 0
46 Cl Melotte 66 2239 * 07 26 36.8765187792 -47 37 30.735323148   13.407 11.809 11.422   ~ 11 0
47 Cl Melotte 66 2215 * 07 26 36.8853062760 -47 39 41.527526472           M5 8 0
48 Cl* Melotte 66 KJF 840 RB? 07 26 37.9638326280 -47 35 39.213286836   14.72 13.4     ~ 3 0
49 Cl Melotte 66 3229 * 07 26 39.2744796816 -47 44 05.750801340   15.168 13.956 13.690 12.65 ~ 8 0
50 Cl Melotte 66 3259 RB? 07 26 39.8709844776 -47 41 10.567051116   15.505 14.4     ~ 6 0
51 Cl* Melotte 66 KJF 704 RB? 07 26 41.1392534112 -47 35 26.739540528   15.28 14.2     ~ 7 0
52 Cl* Melotte 66 KJF 660 RB? 07 26 42.0725452008 -47 40 35.769953712   15.18 14.1     ~ 7 0
53 UCAC4 212-013357 RB? 07 26 43.5553970232 -47 39 34.675078068   15.395 14.103 13.797   ~ 11 0
54 Cl Melotte 66 3252 * 07 26 45.3730416384 -47 42 08.926994556   16.39 15.70     ~ 1 0
55 Cl* Melotte 66 KJF 128 RB? 07 26 56.2868941824 -47 39 05.768235900   14.72 13.5     ~ 3 0
56 NGC 2420 OpC 07 38 24.6 +21 34 26   9.0 8.3     ~ 523 0
57 NGC 2506 OpC 08 00 02.3 -10 46 22   8.28 7.6     ~ 313 0
58 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
59 Cl Collinder 261 OpC 12 38 04.7 -68 22 40     10.7     ~ 216 0
60 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
61 Cl Melotte 66 1332 * ~ ~   15.600 14.500     ~ 2 0
62 Cl Melotte 66 4215 * ~ ~   14.03 12.96     ~ 2 0
63 Cl Melotte 66 3314 * ~ ~           ~ 2 0
64 Cl Melotte 66 3364 * ~ ~   15.937 14.887     ~ 1 0
65 Cl Melotte 66 4111 * ~ ~   18.550 17.750     ~ 1 0
66 Cl Melotte 66 4334 * ~ ~   13.015 11.585     ~ 1 0

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