2013MNRAS.430.3472B

Query : 2013MNRAS.430.3472B

2013MNRAS.430.3472B - Mon. Not. R. Astron. Soc., 430, 3472-3482 (2013/April-3)

Kepler observations of the open cluster NGC 6819.

BALONA L.A., MEDUPE T., ABEDIGAMBA O.P., AYANE G., KEELEY L., MATSIDIDI M., MEKONNEN G., NHLAPO M.D. and SITHOLE N.

Abstract (from CDS):

Using photometry from the Kepler Input Catalogue, we determine the distance and age of NGC6819 using several different methods. From isochrone fitting we find the age of the cluster to be about 2.5Gyr. There are many different types of variables in the field, including eight δ Scuti stars, at least three γ Dor variables and several eclipsing binaries of various types. We derive masses, radii and luminosities from 63 red giants with solar-like oscillations, including 28 stars with no previous measurements, from which we obtain an unreddened distance modulus of 12.20±0.06mag. We measured rotation periods of 129 stars which showed variations attributable to starspots. There is a correlation between the rotation period and the colour which extends to stars with temperatures equivalent to late A-type. This implies that starspots are present in stars which are much hotter than previously supposed. We also discuss several eclipsing binaries and the variability of stars which are blue straggler candidates and discuss X-ray sources found in the cluster.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: oscillations - stars: rotation - starspots - stars: variables: general

Simbad objects: 93

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Number of rows : 93
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 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
2 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0
3 2MASS J19402649+4010382 dS* 19 40 26.4976271160 +40 10 38.230879944     13.42   12.90 ~ 4 0
4 KOI-820 SB* 19 40 27.2880863976 +40 04 16.180029732     15.38   14.66 ~ 28 0
5 UCAC4 651-075334 * 19 40 28.8326617608 +40 10 17.714742888   14.267 13.203 12.881 11.87 ~ 14 0
6 UCAC4 652-075108 * 19 40 33.3566323560 +40 16 16.900542048   13.585 12.621 12.335 11.34 ~ 13 0
7 UCAC4 652-075167 RG* 19 40 39.7166683872 +40 13 52.277550024     14.06 13.761 12.72 K1IV 9 0
8 HD 225364 gD* 19 40 41.6806775112 +40 17 24.549535932 10.15 10.104 9.788 9.619   F0 14 0
9 TYC 3140-2351-1 RG* 19 40 42.6330100824 +40 03 04.219621668   11.73 10.76     K1III 33 0
10 KOI-5138 EB* 19 40 43.4083767888 +40 20 23.533843524     14.21   13.39 ~ 25 0
11 UCAC4 652-075207 * 19 40 44.0620185264 +40 18 11.145961800     14.49 14.328 13.30 ~ 12 0
12 UCAC4 651-075416 RG* 19 40 44.3195926416 +40 05 20.214091212   14.246 13.302 13.022 12.07 ~ 13 0
13 [PGM2013] 673354 BS? 19 40 44.5776717936 +40 12 33.654021732     13.13   12.52 ~ 6 0
14 ATO J295.1959+40.3504 EB* 19 40 47.0354389824 +40 21 01.865136960     16.10 15.530 15.29 ~ 16 0
15 2MASS J19404832+4002288 dS* 19 40 48.3229482528 +40 02 28.826934504     13.12   12.63 Am 11 0
16 2MASS J19404886+4006165 SB* 19 40 48.8649303216 +40 06 16.518080340     16.42   15.62 ~ 10 0
17 UCAC4 652-075257 * 19 40 50.9270431008 +40 19 51.055658760   15.268 14.214 13.888 12.90 ~ 8 0
18 NGC 6819 22 RG* 19 40 51.9766183248 +40 15 36.166342284     15.38   14.02 ~ 6 0
19 TYC 3140-1475-1 * 19 40 54.2003738928 +40 18 15.972366816   13.40 11.78   10.41 ~ 13 0
20 2MASS J19405421+4007149 * 19 40 54.219 +40 07 14.93           ~ 2 0
21 [GXC2015] 295.22812+40.14319 BS? 19 40 54.7449875760 +40 08 35.464578720     15.44   14.75 ~ 12 0
22 UCAC4 652-075309 SB* 19 40 56.0034785880 +40 18 39.047429376   14.667 14.23 14.187 13.55 F5V 5 0
23 NGC 6819 665 SB* 19 40 57.8289183792 +40 09 27.378762912   15.82 15.17   14.38 ~ 34 0
24 UCAC4 652-075325 RG* 19 40 57.8465387040 +40 13 53.065970400   14.085 12.981 12.677 11.67 ~ 15 0
25 KOI-233 EB* 19 40 58.0355997840 +40 09 18.763975548     14.72   13.97 ~ 11 0
26 KIC 5112127 * 19 40 58.2671182296 +40 14 59.750197692           ~ 1 0
27 NGC 6819 753 gD* 19 41 03.5097596208 +40 08 42.563633604     14.79   14.15 ~ 19 0
28 UCAC4 651-075621 RG* 19 41 04.5823305552 +40 04 50.806477056   14.674 13.55 13.217 12.23 ~ 13 0
29 UCAC4 652-075381 RG* 19 41 04.6862578776 +40 14 51.390161880   13.453 12.511 12.240 11.23 ~ 18 0
30 KOI-4682 * 19 41 10.3309325208 +40 11 00.660456312           ~ 8 0
31 UCAC4 652-075448 ** 19 41 10.62288 +40 15 21.5208       15.105   ~ 3 0
32 2MASS J19411073+4006457 * 19 41 10.7306108352 +40 06 45.733457052     15.44   14.56 ~ 9 0
33 2MASS J19411085+4023048 HB* 19 41 10.8488311176 +40 23 04.811738424           K2III 29 0
34 KOI-6494 RG* 19 41 11.0264553173 +40 11 11.674109278   12.78 11.63   10.51 G6V 40 0
35 Cl* NGC 6819 P 7 RG* 19 41 11.1553233501 +40 11 42.298423537   12.92 11.58   10.29 ~ 41 0
36 UCAC4 652-075466 * 19 41 12.1518817488 +40 18 55.989052704   13.513 12.293 11.954 10.86 ~ 16 0
37 KOI-3290 EB* 19 41 12.5080569576 +40 04 11.299403424     15.47   14.70 ~ 14 0
38 UCAC4 651-075752 RG* 19 41 13.1784760992 +40 06 41.784728976     13.44 13.193 12.23 ~ 28 0
39 2MASS J19411360+4009339 RG* 19 41 13.5991451160 +40 09 33.916152996   15.272 14.406 14.496 13.52 ~ 10 0
40 KOI-6540 RG* 19 41 15.1237366368 +40 21 08.383631472     13.65   12.49 ~ 12 0
41 2MASS J19411586+4017252 ** 19 41 15.870 +40 17 25.29   13.40 13.21   12.42 ~ 10 0
42 2MASS J19411600+4012520 RG* 19 41 16.0031763144 +40 12 52.079324400     14.47 14.346 13.22 ~ 6 0
43 NGC 6819 851 SB* 19 41 16.8472356840 +40 07 27.518284056   15.714 15.090   14.34 ~ 24 0
44 KOI-1544 EB* 19 41 16.9847971944 +40 11 14.539797636     15.16   14.37 ~ 29 0
45 NGC 6819 609 BS* 19 41 17.0089980096 +40 10 34.739820480   13.99 13.764   13.078 ~ 19 0
46 NGC 6819 929 gD* 19 41 17.0136648024 +40 06 04.021461396     14.85   14.27 ~ 11 0
47 NGC 6819 550 RG* 19 41 17.0521593408 +40 10 51.852693756   12.524 11.125 11.243 9.92 ~ 40 0
48 KOI-2041 dS* 19 41 17.9400652944 +40 11 13.752314772     14.96   14.18 ~ 15 0
49 NGC 6819 OpC 19 41 18.3 +40 11 19   8.21 7.3     ~ 719 0
50 2MASS J19411993+4012221 * 19 41 19.9266481848 +40 12 22.357959120     15.36   14.63 ~ 7 0
51 2MASS J19412059+4012170 dS* 19 41 20.5953922841 +40 12 17.054760909   15.72 14.51   13.77 ~ 15 0
52 2MASS J19412124+4010558 * 19 41 21.2603491656 +40 10 55.858783044           ~ 2 0
53 V* V2391 Cyg EB* 19 41 21.3259940424 +40 02 14.157045276     16.60     ~ 22 1
54 UCAC4 652-075607 SB* 19 41 21.9905159934 +40 12 02.082326356   13.036 12.019 12.589 11.44 K1II 19 0
55 UCAC4 651-075950 * 19 41 23.3919797904 +40 11 06.802954800   15.291 14.644 15.134 14.52 ~ 3 0
56 GSC 03140-02334 RG* 19 41 24.6361863888 +40 03 19.626606432       10.658   ~ 33 0
57 ATO J295.3541+40.0029 EB* 19 41 25.0026562344 +40 00 10.553797080     15.51   14.73 ~ 30 0
58 ZTF J194125.65+402012.8 BY* 19 41 25.6330373352 +40 20 12.632233092           ~ 7 0
59 UCAC4 652-075650 dS* 19 41 25.7090359056 +40 12 32.859614880     15.55 15.635 14.83 ~ 8 0
60 2MASS J19412582+4013513 RG* 19 41 25.8222641232 +40 13 51.369205116   14.74 13.891 13.609 12.64 ~ 18 0
61 [HGM2009b] WOCS 006023 * 19 41 26.1407428056 +40 00 45.656575200     12.89   11.50 ~ 3 0
62 Cl* NGC 6819 P 36 BS* 19 41 28.2217436040 +40 12 54.434583540   14.67 14.10   13.47 ~ 14 0
63 Cl* NGC 6819 P 35 BS* 19 41 28.9813969800 +40 13 15.391989336   14.26 13.828   13.256 ~ 11 0
64 Cl* NGC 6819 P 24 RG* 19 41 29.5366520118 +40 12 20.975296318   14.20 13.08   11.77 K1.5III 62 0
65 UCAC4 651-076075 * 19 41 32.0862576432 +40 01 19.198786908     13.839 13.597 12.98 G2V 5 0
66 ZTF J194132.67+400011.3 EB* 19 41 32.6735696232 +40 00 11.187949788   15.11 14.48   13.68 ~ 15 0
67 NGC 6819 259 SB* 19 41 33.9265890792 +40 13 00.247822320   16.356 15.651   14.774 ~ 43 1
68 TYC 3140-2343-1 dS* 19 41 34.1422931064 +40 03 14.893066908   11.69 11.14 11.44   F3IV 4 0
69 UCAC4 651-076115 RG* 19 41 36.8315200776 +40 09 03.040678620   14.367 13.287 12.905 11.91 ~ 28 0
70 2MASS J19413713+4000430 dS* 19 41 37.1402082960 +40 00 42.887070396     12.79   12.29 ~ 12 0
71 [HGM2009b] WOCS 034024 * 19 41 37.2953175912 +40 00 36.805425732     15.07   14.22 ~ 3 0
72 Cl* NGC 6819 P 33 RG* 19 41 40.9098088968 +40 11 12.164850780   14.90 13.49   12.01 ~ 12 0
73 2MASS J19414155+4002027 dS* 19 41 41.5616270256 +40 02 02.647023864     13.23   12.58 ~ 4 0
74 UCAC4 652-075824 dS* 19 41 42.1960057824 +40 18 17.908922880   12.103 11.25 11.226 10.34 F9V 5 0
75 UCAC4 651-076182 * 19 41 43.4614353984 +40 08 09.809527344     12.41 12.179 11.33 ~ 8 0
76 [GXC2015] 295.43204+40.32597 dS* 19 41 43.6936304860 +40 19 33.457037726     14.50   13.70 F6V 13 0
77 KOI-6496 dS* 19 41 45.0577696296 +40 07 15.528117540   12.40 11.80   11.12 F5IV 7 0
78 KOI-6497 gD* 19 41 45.4500574320 +40 08 50.766926892     13.366   12.732 ~ 9 0
79 UCAC4 651-076221 SB* 19 41 46.7641853928 +40 10 02.292459312   12.786 12.420 12.345 11.67 ~ 12 0
80 UCAC4 652-075874 * 19 41 48.0691402032 +40 19 45.554131380   14.582 13.497 13.189 12.20 ~ 16 0
81 KOI-6498 EB* 19 41 48.2608128384 +40 10 32.286477684     13.38   12.59 ~ 20 0
82 UCAC4 652-075896 * 19 41 52.1405162088 +40 19 08.151064212   13.553 12.428 12.160 11.07 ~ 12 0
83 UCAC4 651-076279 RG* 19 41 55.3869214632 +40 04 34.727934288   13.929 12.81 12.451 11.42 ~ 27 0
84 2MASS J19415696+4008274 * 19 41 56.9742321480 +40 08 27.325693212     13.07   11.89 ~ 14 0
85 UCAC4 652-075947 * 19 41 57.3679569816 +40 14 03.176891952   15.363 14.21 13.881 12.77 ~ 2 0
86 HD 186307 dS* 19 41 57.6138527237 +40 15 15.006140359   6.39 6.22     A6V 83 0
87 UCAC4 652-075992 * 19 42 02.7296955240 +40 16 48.580109364   14.298 13.256 12.963 11.97 G8IV-V 9 0
88 UCAC4 651-076345 * 19 42 04.4851619568 +40 10 36.287420376   14.570 13.47 13.179 12.20 G6V 13 0
89 KOI-6523 * 19 42 13.4489010936 +40 13 59.143935252     13.87   13.18 F5IV 9 0
90 UCAC4 651-076454 RG* 19 42 16.8327140664 +40 08 11.476550364   12.766 11.819 11.551   K1III 31 0
91 NGC 6866 OpC 20 03 57.7 +44 10 22   8.04 7.6     ~ 185 0
92 NAME Cyg Complex reg 20 32 +45.0           ~ 667 0
93 NAME Lyra reg ~ ~           ~ 62 0

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