2021AJ....161...35L

Query : 2021AJ....161...35L

2021AJ....161...35L - Astron. J., 161, 35-35 (2021/January-0)

The investigation of seven Kepler contact binaries in the field of NGC 6819.

LI X.-Z. and LIU L.

Abstract (from CDS):

Using the Kepler Eclipsing Binary Catalog, we found seven EW-type eclipsing binaries within the tidal radius of the intermediate-aged open cluster NGC 6819 (about 40'). These seven EW eclipsing binaries are all confirmed to be contact binaries by light curve analysis with the 2015 version Wilson-Devinney program. Using the parameter characteristics of contact binaries, we found that only KIC 4937217 could be a member of NGC 6819. Moreover, KIC 5199489 should be a shallow, unity-mass-ratio contact binary implying an early contact stage or a mass-ratio reverse stage. Nevertheless, KIC 5198934 and KIC 5374883 should be deep, low mass ratio contact binaries (DLMRCBs), which are usually considered as premergers.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Eclipsing binary stars - Binary stars - Contact binary stars - Open star clusters

Simbad objects: 26

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Number of rows : 26
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 188 OpC 00 47 14.8 +85 14 42           ~ 990 0
2 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
3 V* QX And SB* 01 57 57.7816919821 +37 48 22.453231805   11.736 11.25 11.23 10.68 F5 126 0
4 V* GU Mon EB* 06 44 46.8606278616 +00 13 18.297261156   11.91 11.57 11.65   B2III 50 0
5 V* NR Cam EB* 07 54 30.5737810680 +78 06 45.338415696   11.77 10.97     G2V 25 0
6 ASAS J083241+2332.4 EB* 08 32 40.9138117032 +23 32 25.822223448     12.70 12.393   ~ 37 0
7 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
8 V* TX Cnc SB* 08 40 01.7039106928 +18 59 59.421095623   10.71 9.97 9.88 9.339 G0-G1V 254 0
9 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
10 Cl* NGC 2682 SAND 1282 SB* 08 51 37.8473566296 +11 50 57.092451072 13.964 13.89 13.333   12.634 F7V 181 0
11 [GGM2006] 2569021 EB* 10 10 42.6797806360 +67 39 31.654494471   10.88 10.28 9.984 9.657 ~ 15 0
12 BD+13 2721 ** 13 53 27.5608262898 +12 56 32.580613915 12.461 11.168 9.767 8.896 8.03 K7V 70 0
13 V* FP Boo SB* 15 43 00.2512236000 +43 15 55.315194516   10.53 10.14     A7III 67 0
14 V* V701 Sco SB* 17 34 24.5126770776 -32 30 15.985127556   9.08 8.97     B5 131 0
15 V* V1309 Sco CV* 17 57 32.9368332984 -30 43 09.965039880           ~ 320 0
16 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
17 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0
18 HAT 199-12392 EB* 19 39 43.1666284344 +40 08 49.206323400   12.02 11.71   10.904 F6IV 29 0
19 ATO J295.0661+40.3281 RS* 19 40 15.8744263032 +40 19 41.519175312   14.763 14.372 14.352   ~ 15 0
20 ATO J295.1959+40.3504 EB* 19 40 47.0354389824 +40 21 01.865136960     16.10 15.530 15.29 ~ 16 0
21 ATO J295.2248+40.5264 EB* 19 40 53.9584143744 +40 31 35.442915204           ~ 17 0
22 NGC 6819 OpC 19 41 18.3 +40 11 19   8.21 7.3     ~ 719 0
23 ATO J295.3541+40.0029 EB* 19 41 25.0026562344 +40 00 10.553797080     15.51   14.73 ~ 30 0
24 ASAS J194227+4035.9 EB* 19 42 26.3535054744 +40 35 53.995337412     12.727   12.071 ~ 25 0
25 ATO J296.1652+40.0799 EB* 19 44 39.6631225584 +40 04 47.950690548           ~ 21 0
26 NGC 6866 OpC 20 03 57.7 +44 10 22   8.04 7.6     ~ 185 0

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