J/other/NewA/17.296 GO Cyg BV light curves (Ulas+, 2012)
Close binary system GO Cyg.
Ulas B., Kalomeni B., Keskin V., Kose O., Yakut K.
<New Astron. 17 296 (2012)>
=2012NewA...17..296U 2012NewA...17..296U
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV
Keywords: stars: binaries: eclipsing - stars: binaries: close -
stars: binaries: general - stars: fundamental parameters -
stars: low-mass
Abstract:
In this study, we present long term photometric variations of the
close binary system GO Cyg. Modelling of the system shows that the
primary is filling Roche lobe and the secondary of the system is
almost filling its Roche lobe. The physical parameters of the system
are M1=3.0±0.2M☉, M2=1.3±0.1M☉,
R1=2.50±0.12R☉, R2=1.75±0.09R☉,
L1=64±9L☉, L2=4.9±0.7L☉, and a=5.5±0.3R☉.
Our results show that GO Cyg is the most massive system near contact
binary (NCB). Analysis of times of the minima shows a sinusoidal
variation with a period of 92.3±0.5-years due to a third body whose
mass is less than 2.3M☉. Finally a period variation rate of
-1.4x10-9d/yr has been determined using all available light curves.
Description:
Photometric variations of the close binary system GO Cyg is presented.
Physical and orbital parameters of the system are determined. It is
found that the the system is the most massive among near contact
binaries.
Objects:
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RA (2000) DE Designation(s)
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20 37 20.1 +35 26 10 GO Cyg = V* GO Cyg
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 101 16 Available light curves of GO Cyg that are
collected from the literature
table5.dat 34 5417 Available light curves data
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See also:
J/other/NewA/17.46 : VRI light curves of V1191 Cyg (Ulas+, 2012)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- LC Light curve designation (1)
6- 12 A7 --- Date Date of observation (Year)
14- 20 F7.1 d JD1 ? Time interval (JD-2400000)
21 A1 --- --- [-]
22- 28 F7.1 d JD2 ? Time interval (JD-2400000)
30- 38 A9 --- Filt Filters used
40- 42 A3 --- Type Type of observation (pg, pe, ccd)
44- 77 A34 --- Comp Comparison star(s)
79- 99 A21 --- Npts Number of data points be filters
101 A1 --- Data [Y/N] Data availability
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Note (1): References for the light curves:
LC01 = Payne-Gaposchkin (1935, BHarO 898, 3)
LC02 = Liau (1935, POLyo, 1)
LC03 = Pierce (1939, AJ 48, 113)
LC04 = Popper (1957ApJS....3..107P 1957ApJS....3..107P)
LC05 = Ovenden (1954MNRAS.114..569O 1954MNRAS.114..569O)
LC06 = Mannino (1963MmSAI..34..191M 1963MmSAI..34..191M)
LC07 = Sezer et al. (1993Ap&SS.203..121S 1993Ap&SS.203..121S)
LC08 = Rovithis et al. (1990A&AS...83...41R 1990A&AS...83...41R)
LC09 = Oprescu et al. (1996RoAJ....6..119O 1996RoAJ....6..119O)
LC10 = Jassur (1997Ap&SS.249..111J 1997Ap&SS.249..111J)
LC11 = Rovithis-Livaniou et al. (1997A&A...327.1017R 1997A&A...327.1017R)
LC12 = Edalati and Atighi (1997Ap&SS.253..107E 1997Ap&SS.253..107E)
LC13 = Vukasovic (1997, IAPPP 67, 11)
LC14 = Oh et al. (2000Ap&SS.271..303K 2000Ap&SS.271..303K)
LC15 = Zabihinpoor et al. (2010PASP..122..309Z 2010PASP..122..309Z)
LC16 = This study
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- LC Light curve designation
6 A1 --- Filt [BV] Filter
8- 19 F12.4 d JD ? Julian date (1)
21- 27 F7.4 --- Phase ? Orbital phase (1)
29- 34 F6.3 mag Dmag Differential magnitude (2)
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Note (1): Phases are given for the light curves LC3, LC5, and LC15 since
JDs are not provided. P0=0.717764585(15)d.
Note (2): Magnitude differences between variable and comparison stars.
Comparison stars are listed in Table 3.
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Acknowledgements:
Burak Ulas, bulash(at)gmail.com
(End) Burak Ulas [EU], Patricia Vannier [CDS] 02-Dec-2011