2003AJ....126..276K

Query : 2003AJ....126..276K

2003AJ....126..276K - Astron. J., 126, 276-285 (2003/July-0)

WIYN open cluster study. XV. Photometric monitoring of open clusters: new variables in NGC 188.

KAFKA S. and HONEYCUTT R.K.

Abstract (from CDS):

Photometric monitoring of the central 17'x17' of the old open cluster NGC 188 with the WIYN 3.5 m telescope has resulted in the discovery of a number of new variable stars, down to 21.5 mag in V, 35 of which have well-determined periods. The variability types of the fainter stars of the sample (18-21.5 mag) remain uncertain. However, most of the brighter stars (15-18 mag) probably make up the low-luminosity extension of the already known W UMa population of NGC 188. We also report the discovery of two longer period variables on the subgiant branch of the cluster CMD, most likely FK Comae stars, which suggests that the cluster may provide significant insight on the formation and evolution of contact binary systems. Alternatively, these objects may represent a new kind of pulsation variables.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Binaries: General - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 188 - Stars: Variables: General - Stars: Variables: Other

Nomenclature: Tables 2, 4: Cl* NGC 188 WV NN (Nos 1-51).

Simbad objects: 52

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Number of rows : 52
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 Cl* NGC 188 WV 23 V* 00 41 14.0838156840 +85 12 20.986390872   19.540 18.390 17.668 17.075 ~ 5 0
2 Cl* NGC 188 WV 26 SB* 00 41 35.6149721040 +85 21 04.877128008 16.562 16.402 15.756 15.354 14.981 ~ 10 0
3 Cl* NGC 188 WV 16 V* 00 41 43.0646021664 +85 06 28.216245024   19.294 17.926 17.023 16.157 ~ 4 0
4 Cl* NGC 188 WV 17 V* 00 41 49.3171604328 +85 13 12.325135764   19.999 18.668 17.826 17.050 ~ 5 0
5 NGC 188 3155 V* 00 41 50.6463664248 +85 15 46.774034280 17.103 16.84 16.10 15.707 15.310 ~ 12 0
6 Cl* NGC 188 PKM 4416 V* 00 41 57.1350428304 +85 08 52.356837804   20.235 18.966 18.134 17.465 ~ 4 0
7 Cl* NGC 188 WV 27 V* 00 42 06.1968245736 +85 19 17.312608560 18.077 18.263 17.729 17.360 16.967 ~ 4 0
8 Cl* NGC 188 PKM 4400 V* 00 43 20.8046038560 +85 09 59.165678736   19.885 18.664 17.903 17.289 ~ 6 0
9 NGC 188 3012 V* 00 43 23.0272631256 +85 10 20.865499068 17.689 17.364 16.592 16.140 15.736 ~ 9 0
10 Cl* NGC 188 WV 10 V* 00 43 31.9053239232 +85 14 23.707779612   20.211 18.937 18.102 17.446 ~ 6 0
11 NGC 188 3130 SB* 00 44 29.9455558008 +85 20 54.810084408 17.019 16.877 16.096 15.534 15.158 ~ 14 0
12 V* V767 Cep EB* 00 44 36.5818272672 +85 14 22.664029200 15.846 15.589 14.885 14.458 14.070 ~ 16 0
13 NGC 188 3021 V* 00 44 37.1446010472 +85 09 49.787580024 18.300 17.842 16.987 16.487 16.057 ~ 10 0
14 Cl* NGC 188 WV 5 V* 00 44 48.9154665744 +85 10 05.183041404   18.409 17.471 16.908 16.456 ~ 9 0
15 NGC 188 2196 V* 00 45 02.7897741168 +85 09 47.044575396 17.424 17.155 16.404 15.966 15.561 ~ 12 0
16 Cl* NGC 188 WV 18 V* 00 45 48.0855700944 +85 09 43.222684644   18.403 17.449 16.892 16.412 ~ 6 0
17 NGC 188 1178 V* 00 46 07.3533329424 +85 13 49.657840644   21.00 19.16 17.835 16.194 ~ 7 0
18 V* EP Cep EB* 00 46 54.0135254616 +85 21 43.681861692 18.085 17.538 16.664 16.121 15.589 ~ 53 0
19 NGC 188 OpC 00 47 14.8 +85 14 42           ~ 990 0
20 Cl* NGC 188 WV 41 V* 00 47 17.99 +85 24 12.6           ~ 2 0
21 V* EQ Cep EB* 00 47 33.3761816280 +85 16 24.254175108 18.521 17.547 16.703 16.142 15.951 ~ 59 0
22 NGC 188 1012 V* 00 47 50.7237167520 +85 15 43.078825764 16.078 15.855 15.233 14.867 14.517 ~ 14 0
23 NGC 188 3036 V* 00 48 34.7550543624 +85 07 36.914153880 17.287 17.330 16.751 16.352 15.987 ~ 4 0
24 Cl* NGC 188 WV 32 V* 00 48 56.0241752448 +85 07 24.502156464   19.215 18.141 17.472 16.915 ~ 9 0
25 Cl* NGC 188 WV 21 V* 00 49 37.2512308752 +85 15 22.899347244 18.598 17.961 17.066 16.509 16.008 ~ 9 0
26 NGC 188 2127 BS* 00 50 10.9334535480 +85 14 38.106099528 15.985 15.915 15.373 15.004 14.705 ~ 34 0
27 Cl* NGC 188 WV 9 V* 00 50 14.2211245224 +85 10 08.809887972   20.037 19.058 18.418 17.851 ~ 3 0
28 V* ER Cep EB* 00 50 27.6907877016 +85 15 08.488920060 17.145 16.635 15.809 15.175 14.804 ~ 61 0
29 Cl* NGC 188 WV 44 V* 00 50 49.31 +85 15 14.2           ~ 2 0
30 V* V783 Cep BY* 00 51 15.8349690984 +85 09 47.930538960 16.791 16.177 15.233 14.653 14.181 ~ 9 0
31 Cl* NGC 188 WV 20 V* 00 51 21.2745655488 +85 09 23.037170436 18.004 17.599 16.781 16.293 15.862 ~ 10 0
32 NGC 188 3047 V* 00 51 33.0588777024 +85 09 58.537955052 16.319 15.893 15.022 14.525 14.085 ~ 14 0
33 Cl* NGC 188 WV 35 V* 00 51 41.6273428056 +85 06 48.572045316   19.941 18.520 17.570 16.725 ~ 4 0
34 Cl* NGC 188 WV 2 V* 00 52 31.05 +85 23 14.9   21.554 21.859     ~ 5 0
35 Cl* NGC 188 WV 30 V* 00 52 36.3240091272 +85 07 10.476293124   20.260 19.253 18.621 17.995 ~ 3 0
36 Cl* NGC 188 WV 31 V* 00 53 30.1800744288 +85 06 40.485189708   19.463 18.342 17.604 17.062 ~ 3 0
37 Cl* NGC 188 WV 19 V* 00 54 03.7826379888 +85 08 26.741430996 16.781 16.642 15.991 15.581 15.199 ~ 5 0
38 Cl* NGC 188 WV 13 V* 00 54 31.0058945472 +85 22 39.733527936 17.020 17.032 16.461 16.158 15.739 ~ 4 0
39 Cl* NGC 188 SMV 11022 V* 00 54 36.5481956808 +85 19 39.598024548   21.504 20.698     ~ 3 0
40 Cl* NGC 188 WV 43 V* ~ ~           ~ 1 0
41 Cl* NGC 188 WV 50 V* ~ ~           ~ 2 0
42 Cl* NGC 188 WV 49 V* ~ ~           ~ 1 0
43 Cl* NGC 188 WV 48 V* ~ ~           ~ 2 0
44 Cl* NGC 188 WV 47 V* ~ ~           ~ 2 0
45 Cl* NGC 188 WV 46 V* ~ ~           ~ 2 0
46 Cl* NGC 188 WV 45 V* ~ ~           ~ 1 0
47 Cl* NGC 188 WV 51 V* ~ ~           ~ 2 0
48 Cl* NGC 188 WV 42 V* ~ ~           ~ 1 0
49 Cl* NGC 188 WV 40 V* ~ ~           ~ 2 0
50 Cl* NGC 188 WV 39 V* ~ ~           ~ 2 0
51 Cl* NGC 188 WV 37 V* ~ ~           ~ 1 0
52 Cl* NGC 188 WV 25 V* ~ ~           ~ 2 0

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