2009PASP..121.1188S

Query : 2009PASP..121.1188S

2009PASP..121.1188S - Publ. Astron. Soc. Pac., 121, 1188-1204 (2009/November-0)

Periodic variables and gyrochronology in the open cluster NGC 2301.

SUKHBOLD T. and HOWELL S.B.

Abstract (from CDS):

We present the results of a search for periodic variables within 4078 time-series light curves and an analysis of the period-color plane for stars in the field of the open cluster NGC 2301. One hundred thirty-eight periodic variables were discovered, of which five are eclipsing binary candidates with unequal minima. The remaining 133 periodic variables appear to consist mainly of late-type stars whose variation is due to rotation modulated by star spot activity. The determined periods range from less than a day to over 14 days and have nearly unreddened colors in the range of 0.8 to 2.8. The Barnes interpretation of the period-color plane of late type stars is tested with our data. Our data did not show distinct I and C sequences, likely due to nonmember field stars contaminating in the background, as we estimate the total contamination to be 43%. Using different assumptions, the gyrochronological age of the cluster is calculated to be, which falls in the range of age values (164-250 Myr) determined by previous studies. Finally, we present evidence which nullifies the earlier suggestion that two of the variable stars in NGC 2301 might be white dwarfs.

Abstract Copyright: ∼

Journal keyword(s): Star Clusters and Associations

VizieR on-line data: <Available at CDS (J/PASP/121/1188): table2.dat>

Nomenclature: Table 2: Cl* NGC 2301 HVT CNNNN, Cl* NGC 2301 HVT WNNNN N=119, Cl* NGC 2301 HVTSE NNNN N=14.

Simbad objects: 146

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Number of rows : 146
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 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
2 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
3 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
4 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
6 M 37 OpC 05 52 18.6 +32 32 36           ~ 436 0
7 NGC 2168 OpC 06 09 07.5 +24 20 15           ~ 604 0
8 Cl* NGC 2301 HVT W282 Ro* 06 51 00.6959817120 +00 29 50.145499608   19.887   17.741   ~ 3 0
9 Cl* NGC 2301 HVT W105 BY* 06 51 00.9604197408 +00 27 23.332094352   17.169   15.735   ~ 10 0
10 Cl* NGC 2301 HVT W580 Ro* 06 51 05.4527017080 +00 28 56.260618284   21.172   18.920   ~ 1 0
11 Cl* NGC 2301 HVT W54 Ro* 06 51 11.0188127424 +00 32 00.725501256   15.08   14.052   ~ 1 0
12 Cl* NGC 2301 HVT W376 Ro* 06 51 11.8184228448 +00 36 14.918952348   19.15   16.992   ~ 4 0
13 Cl* NGC 2301 HVT W318 Ro* 06 51 12.8448349632 +00 31 55.974312480   19.988   17.622   ~ 3 0
14 Cl* NGC 2301 HVT W58 Ro* 06 51 13.5734533776 +00 33 26.353698444   15.461   14.383   ~ 7 0
15 Cl* NGC 2301 HVT W203 Ro* 06 51 13.9200108888 +00 31 24.722533236   18.835   16.858   ~ 5 0
16 Cl* NGC 2301 HVT W211 Ro* 06 51 15.1923370656 +00 32 30.369203232   18.806   16.784   ~ 1 0
17 Cl* NGC 2301 HVT W276 Ro* 06 51 15.8270025840 +00 29 01.780536588   19.897   17.579   ~ 5 0
18 Cl* NGC 2301 HVT W482 Ro* 06 51 16.3541717808 +00 34 41.876172012   20.693   18.244   ~ 1 0
19 Cl* NGC 2301 HVT W330 Ro* 06 51 16.6367804808 +00 32 40.390020816   19.625   17.666   ~ 1 0
20 Cl* NGC 2301 HVT W235 EB* 06 51 17.3277186144 +00 34 56.504726472   18.528   16.62   ~ 5 0
21 Cl* NGC 2301 HVT W269 Ro* 06 51 19.8668704344 +00 28 37.095528432   19.412   17.257   ~ 1 0
22 Cl* NGC 2301 HVT W163 Ro* 06 51 24.3778216704 +00 34 27.507636732   17.017   15.532   ~ 7 0
23 Cl* NGC 2301 HVT W230 Ro* 06 51 24.8514437160 +00 34 32.910772836   18.694   16.721   ~ 4 0
24 Cl* NGC 2301 HVT W126 Ro* 06 51 25.1388572184 +00 30 34.733067912   17.051   15.528   ~ 7 0
25 Cl* NGC 2301 HVT W441 Ro* 06 51 26.3153410128 +00 31 13.547516628   21.133   18.467   ~ 1 0
26 Cl* NGC 2301 HVT W354 Ro* 06 51 27.1207002600 +00 34 28.646258916   19.605   17.322   ~ 3 0
27 Cl* NGC 2301 HVT W535 Ro* 06 51 28.7268363288 +00 29 55.561090416   16.187   14.910   ~ 5 0
28 Cl* NGC 2301 HVT W198 Ro* 06 51 29.0367084960 +00 30 40.760550180   17.773   16.352   ~ 1 0
29 Cl* NGC 2301 HVT W430 Ro* 06 51 29.8107306528 +00 30 28.945337076   20.543   18.016   ~ 1 0
30 Cl* NGC 2301 HVT W528 Ro* 06 51 30.1335238152 +00 33 15.693560388   20.89   18.332   ~ 1 0
31 Cl* NGC 2301 HVT W182 Ro* 06 51 30.1910432184 +00 28 40.777308624   18.394   16.528   ~ 5 0
32 Cl* NGC 2301 HVT W145 Ro* 06 51 31.5428158752 +00 32 55.142931156   17.396   15.810   ~ 7 0
33 Cl* NGC 2301 HVT W205 Ro* 06 51 31.9912243752 +00 31 24.104520840   17.971   16.448   ~ 1 0
34 Cl* NGC 2301 HVT W300 Ro* 06 51 32.0190138792 +00 30 46.018793700   19.578   17.400   ~ 2 0
35 Cl* NGC 2301 HVT W440 Ro* 06 51 32.1202972104 +00 31 10.957918368   20.67   18.214   ~ 1 0
36 Cl* NGC 2301 HVT W341 Ro* 06 51 34.0605248112 +00 33 35.625419856   19.49   17.460   ~ 1 0
37 Cl* NGC 2301 HVT W356 Ro* 06 51 36.2782420080 +00 34 33.228220116   19.545   17.550   ~ 1 0
38 NGC 2301 18 Ro* 06 51 37.0833125112 +00 30 21.716697960   14.512 13.81 13.5   ~ 7 0
39 NGC 2301 21 Ro* 06 51 40.4692663200 +00 29 12.155521812   16.461 15.72 15.210   ~ 5 0
40 Cl* NGC 2301 HVT C516 Ro* 06 51 40.6196848512 +00 32 24.142187616   20.367   18.010   ~ 2 0
41 Cl* NGC 2301 HVT C381 Ro* 06 51 41.0955601584 +00 30 40.685245668   19.285   17.275   ~ 1 0
42 Cl* NGC 2301 HVT C145 Ro* 06 51 41.5261549944 +00 26 09.649113180   16.811   15.269   ~ 6 0
43 Cl* NGC 2301 HVT C135 Ro* 06 51 41.5447811592 +00 24 10.052854092   16.741   15.439   ~ 7 0
44 Cl* NGC 2301 HVT S150 Ro* 06 51 42.2280994176 +00 20 25.892469312   17.966   16.597   ~ 1 0
45 Cl* NGC 2301 HVT C79 Ro* 06 51 42.3966772706 +00 25 31.487835292   14.684   13.780   ~ 9 0
46 Cl* NGC 2301 HVT S128 Ro* 06 51 42.7970997408 +00 17 49.309654128   18.033   16.562   ~ 1 0
47 V* V853 Mon RS* 06 51 43.2756531240 +00 31 18.614475768   17.172 15.98     ~ 8 0
48 Cl* NGC 2301 HVT S146 Ro* 06 51 44.1297847296 +00 20 02.401635660   17.158   15.830   ~ 1 0
49 Cl* NGC 2301 HVT C179 BY* 06 51 44.3367461712 +00 25 59.928320748   17.723   16.105   ~ 3 0
50 Cl* NGC 2301 HVT C181 Ro* 06 51 44.7226348896 +00 26 07.322009424   17.539   15.861   ~ 6 0
51 Cl* NGC 2301 HVT S64 Ro* 06 51 45.9953951160 +00 22 43.823743752   15.847   14.733   ~ 6 0
52 Cl* NGC 2301 HVT C194 Ro* 06 51 46.2002002687 +00 27 02.586055456   18.065   16.347   ~ 2 0
53 Cl* NGC 2301 HVT C229 Ro* 06 51 46.7913239184 +00 24 56.243146320   18.183   16.614   ~ 1 0
54 Cl* NGC 2301 HVT S556 Ro* 06 51 48.1644903456 +00 23 17.936592900   20.797   18.312   ~ 1 0
55 Cl* NGC 2301 HVT C183 Ro* 06 51 48.5595434376 +00 26 13.165207044   17.968   16.196   ~ 7 0
56 Cl* NGC 2301 HVT S438 Ro* 06 51 49.5110438616 +00 16 21.687113676   20.733   18.312   ~ 1 0
57 Cl* NGC 2301 HVT S108 Ro* 06 51 49.8691970688 +00 24 04.966881768   16.99   15.547   ~ 5 0
58 NGC 2301 OpC 06 51 51.0 +00 28 35   6.30 6.0     ~ 173 0
59 Cl* NGC 2301 HVT C215 Ro* 06 51 51.9325695240 +00 31 21.873853452   16.934   15.518   ~ 7 0
60 Cl* NGC 2301 HVT C261 Ro* 06 51 52.3602631728 +00 28 28.379397972   18.365   16.581   ~ 1 0
61 Cl* NGC 2301 HVT C578 EB* 06 51 52.3865277936 +00 25 26.626138464   21.128   18.894   ~ 2 0
62 Cl* NGC 2301 HVT S48 Ro* 06 51 52.4112336024 +00 17 45.793151016   16.414   15.135   ~ 6 0
63 Cl* NGC 2301 HVT C281 Em* 06 51 52.7540877528 +00 30 44.946912204   19.05   16.845   ~ 7 0
64 Cl* NGC 2301 HVT S270 BY* 06 51 52.9661899176 +00 24 15.994383624   19.258   17.173   ~ 7 0
65 Cl* NGC 2301 HVT S257 Ro* 06 51 53.0209729392 +00 22 57.760886748   18.514   16.610   ~ 6 0
66 Cl* NGC 2301 HVT C130 Ro* 06 51 53.1715056192 +00 31 39.160406496   15.776   14.632   ~ 6 0
67 Cl* NGC 2301 HVT S27 Ro* 06 51 53.1867479088 +00 20 56.315193576   15.028   14.106   ~ 2 0
68 Cl* NGC 2301 HVT S100 Ro* 06 51 54.0705480864 +00 22 15.725984160   17.524   15.608   ~ 1 0
69 Cl* NGC 2301 HVT S262 Ro* 06 51 55.6041043032 +00 23 18.250315296   18.675   16.816   ~ 3 0
70 Cl* NGC 2301 HVT S272 Ro* 06 51 56.7472087968 +00 24 25.855025220   18.397   16.486   ~ 4 0
71 V* V857 Mon EB* 06 51 56.7488034864 +00 25 46.947367632   16.885 15.82 15.502   ~ 11 0
72 V* V858 Mon EB* 06 51 57.2765582376 +00 25 46.510828176   16.797 15.73 15.235   ~ 8 0
73 Cl* NGC 2301 HVT S58 Ro* 06 51 57.4331590464 +00 21 20.477505672   15.975   14.788   ~ 6 0
74 Cl* NGC 2301 HVT S553 Ro* 06 51 57.5230079064 +00 23 08.564516268   20.85   18.279   ~ 1 0
75 Cl* NGC 2301 HVT C85 Ro* 06 51 58.3392662969 +00 26 49.655050514   14.78   13.846   ~ 9 0
76 Cl* NGC 2301 HVT C155 Ro* 06 51 58.3546325784 +00 28 10.564528260   16.428   15.145   ~ 6 0
77 Cl* NGC 2301 HVT C487 Ro* 06 51 59.8875534456 +00 29 25.863818928   19.504   17.635   ~ 1 0
78 Cl* NGC 2301 HVT S77 Ro* 06 52 01.8239893464 +00 17 18.040651800   17.164   15.600   ~ 7 0
79 Cl* NGC 2301 HVT S210 Ro* 06 52 02.7261247248 +00 18 52.140463056   19.395   17.175   ~ 6 0
80 Cl* NGC 2301 HVT C434 Ro* 06 52 02.9004276504 +00 25 27.667768692   20.425   17.992   ~ 5 0
81 Cl* NGC 2301 HVT C96 Ro* 06 52 03.6777559848 +00 30 03.776511996   14.637   13.688   ~ 1 0
82 Cl* NGC 2301 HVT S383 Ro* 06 52 03.9245097432 +00 22 34.380455700   19.406   17.186   ~ 5 0
83 Cl* NGC 2301 HVT S274 BY* 06 52 03.9396940392 +00 24 37.175271768   19.252   17.144   ~ 7 0
84 Cl* NGC 2301 HVT S218 Ro* 06 52 05.2149175992 +00 19 38.572370400   19.068   17.069   ~ 2 0
85 Cl* NGC 2301 HVT C758 * 06 52 07.99 +00 31 03.0           ~ 2 0
86 Cl* NGC 2301 HVT N294 Ro* 06 52 08.3706485544 +00 33 15.013154880   20.233   17.915   ~ 1 0
87 Cl* NGC 2301 HVT N203 Ro* 06 52 08.4334609104 +00 33 07.362654840   18.86   17.282   ~ 1 0
88 Cl* NGC 2301 HVT S153 Ro* 06 52 08.8756810896 +00 20 20.387169816   17.324   15.996   ~ 1 0
89 Cl* NGC 2301 HVT C112 Ro* 06 52 10.3850496168 +00 25 44.018567580   15.39   14.326   ~ 6 0
90 Cl* NGC 2301 HVT S471 Ro* 06 52 10.6169097912 +00 18 08.668234512   20.27   17.867   ~ 4 0
91 Cl* NGC 2301 HVT N616 Ro* 06 52 11.1 +00 36 42   21.174   18.934   ~ 1 0
92 Cl* NGC 2301 HVT C490 Ro* 06 52 11.2068879264 +00 29 26.868060276   20.766   18.220   ~ 1 0
93 Cl* NGC 2301 HVT N99 Ro* 06 52 11.351 +00 37 56.10   17.578   16.004   ~ 1 0
94 Cl* NGC 2301 HVT N402 Ro* 06 52 12.8370928296 +00 39 02.858678892   19.6   17.605   ~ 1 0
95 Cl* NGC 2301 HVT N123 RS* 06 52 12.9948998112 +00 32 59.551104552   17.392   16.239   ~ 3 0
96 Cl* NGC 2301 HVT E227 Ro* 06 52 14.2555741032 +00 29 12.887141676   18.706   16.998   ~ 1 0
97 Cl* NGC 2301 HVT E121 Em* 06 52 15.1026384816 +00 24 43.315913196   17.761   16.199   ~ 6 0
98 Cl* NGC 2301 HVT E139 Ro* 06 52 15.7825274708 +00 26 47.499758497   17.704   16.027   ~ 4 0
99 Cl* NGC 2301 HVT N495 Ro* 06 52 16.5159919008 +00 40 52.708468260   20.611   18.322   ~ 1 0
100 Cl* NGC 2301 HVT E108 Ro* 06 52 16.7238857784 +00 31 58.993300308   16.489   15.356   ~ 1 0
101 Cl* NGC 2301 HVTSE 39 Ro* 06 52 17.5065093528 +00 17 27.570892308   15.356   14.368   ~ 6 0
102 Cl* NGC 2301 HVT N413 Ro* 06 52 18.5603794512 +00 39 34.532534016   19.952   17.703   ~ 1 0
103 Cl* NGC 2301 HVT N127 Ro* 06 52 18.6147667056 +00 33 32.147489628   18.608   16.598   ~ 6 0
104 Cl* NGC 2301 HVTSE 222 Ro* 06 52 18.7506454536 +00 17 48.203117700   18.28   16.793   ~ 1 0
105 Cl* NGC 2301 HVTSE 206 Ro* 06 52 19.8 +00 15 29   18.212   16.671   ~ 1 0
106 Cl* NGC 2301 HVT N175 Ro* 06 52 20.3682269712 +00 39 08.211524220   18.744   16.721   ~ 3 0
107 Cl* NGC 2301 HVT N116 Ro* 06 52 20.4009973344 +00 41 06.782561664   16.896   15.468   ~ 6 0
108 Cl* NGC 2301 HVT E59 Ro* 06 52 20.7032424384 +00 26 41.706107844   15.801   14.647   ~ 6 0
109 Cl* NGC 2301 HVT E46 Ro* 06 52 22.5270629064 +00 27 36.971926632   14.872   13.912   ~ 6 0
110 Cl* NGC 2301 HVT E327 Ro* 06 52 22.7956708992 +00 26 58.612773732   19.873   17.553   ~ 1 0
111 Cl* NGC 2301 HVTSE 435 Ro* 06 52 23.7707338272 +00 22 28.331553612   20.274   17.830   ~ 3 0
112 Cl* NGC 2301 HVT N414 Ro* 06 52 23.8963768680 +00 39 38.328845436   20.673   18.146   ~ 1 0
113 Cl* NGC 2301 HVT E246 Ro* 06 52 24.6478425456 +00 31 09.154874244   19.062   17.315   ~ 1 0
114 Cl* NGC 2301 HVTSE 142 Ro* 06 52 25.5925054344 +00 16 35.238022824   17.42   16.039   ~ 1 0
115 Cl* NGC 2301 HVT N752 * 06 52 25.6871821704 +00 39 34.738759800           ~ 1 0
116 Cl* NGC 2301 HVT E141 Ro* 06 52 25.7531059320 +00 27 00.358573320   17.466   15.983   ~ 1 0
117 Cl* NGC 2301 HVT N503 Ro* 06 52 25.801 +00 36 09.42   17.634   15.843   ~ 1 0
118 Cl* NGC 2301 HVT N147 Ro* 06 52 25.8594811488 +00 35 14.241742728   17.751   16.207   ~ 1 0
119 Cl* NGC 2301 HVTSE 159 Ro* 06 52 26.0376057552 +00 19 27.401578968   17.998   16.476   ~ 1 0
120 Cl* NGC 2301 HVT E76 Ro* 06 52 27.4272390720 +00 23 29.767029396   16.484   15.192   ~ 7 0
121 Cl* NGC 2301 HVT E240 Ro* 06 52 28.2892288128 +00 30 45.562334004   19.055   16.833   ~ 4 0
122 Cl* NGC 2301 HVT E383 Ro* 06 52 28.9067718456 +00 30 37.462476780   20.801   18.200   ~ 1 0
123 Cl* NGC 2301 HVT E167 Ro* 06 52 29.2366004376 +00 32 07.323029124   18.223   16.622   ~ 1 0
124 Cl* NGC 2301 HVT N157 EB* 06 52 30.6001708536 +00 36 29.947347648   18.093   16.322   ~ 5 0
125 Cl* NGC 2301 HVTSE 225 Ro* 06 52 31.6649810448 +00 18 00.835807716   18.903   16.847   ~ 6 0
126 Cl* NGC 2301 HVT E151 Ro* 06 52 32.4790441080 +00 28 56.061852276   18.526   16.603   ~ 4 0
127 Cl* NGC 2301 HVT N110 Ro* 06 52 32.7541126080 +00 40 05.826279288   16.546   15.173   ~ 6 0
128 Cl* NGC 2301 HVTSE 234 Ro* 06 52 33.5348809680 +00 19 14.502627120   19.174   16.992   ~ 2 0
129 Cl* NGC 2301 HVT N434 Ro* 06 52 34.1618054376 +00 40 20.163604332   19.97   17.606   ~ 3 0
130 Cl* NGC 2301 HVT E134 BY* 06 52 36.3794684568 +00 26 08.414219112   17.895   16.243   ~ 3 0
131 Cl* NGC 2301 HVT E97 Ro* 06 52 37.3039751088 +00 28 36.695485740   17.178   15.646   ~ 7 0
132 Cl* NGC 2301 HVT E333 Ro* 06 52 38.7242089728 +00 27 16.301885940   20.61   18.268   ~ 1 0
133 Cl* NGC 2301 HVT E218 Ro* 06 52 38.742 +00 28 26.79   19.386   17.476   ~ 1 0
134 Cl* NGC 2301 HVTSE 173 Ro* 06 52 39.8947714512 +00 21 02.025818640   18.136   16.313   ~ 6 0
135 Cl* NGC 2301 HVTSE 345 Ro* 06 52 40.5822891936 +00 15 44.719657632   19.711   17.929   ~ 1 0
136 Cl* NGC 2301 HVTSE 239 Ro* 06 52 42.3375279672 +00 19 37.147648260   18.986   17.292   ~ 1 0
137 Cl* NGC 2301 HVT E231 Ro* 06 52 42.7782741360 +00 29 32.746888284   19.284   17.035   ~ 5 0
138 Cl* NGC 2301 HVT N65 EB* 06 52 43.0443016706 +00 38 53.710432475   15.621   14.567   ~ 5 0
139 Cl* NGC 2301 HVT E372 Ro* 06 52 43.1830492080 +00 30 05.056570116   20.154   17.718   ~ 3 0
140 Cl* NGC 2301 HVTSE 284 Ro* 06 52 43.2542791008 +00 16 03.619239060   19.59   17.410   ~ 2 0
141 Cl* NGC 2301 HVT N151 Ro* 06 52 43.3785366648 +00 36 01.031930964   18.252   16.443   ~ 5 0
142 Cl* NGC 2301 HVTSE 292 EB* 06 52 43.8005401704 +00 16 48.639303192   19.220   17.386   ~ 4 0
143 Cl* NGC 2301 HVTSE 271 EB* 06 52 46.1984127216 +00 21 54.222361704   19.396   17.242   ~ 4 0
144 Cl* NGC 2301 HVTSE 262 Ro* 06 52 47.3775805800 +00 21 02.577737808   19.185   17.293   ~ 1 0
145 Cl* NGC 2301 HVTSE 69 Ro* 06 52 51.9495943416 +00 20 37.307284332   16.583   15.236   ~ 1 0
146 Feige 110 HS* 23 19 58.3996844256 -05 09 56.171142864 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 673 1

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