scholarly journals HL Aurigae: A near-contact binary system

1997 ◽  
Vol 122 (3) ◽  
pp. 515-519 ◽  
Author(s):  
R. X. Zhang ◽  
M. J. Fang ◽  
D. S. Zhai
Keyword(s):  
Binary System ◽  
Contact Binary

scholarly journals Variability of the Light Curves of the Close Binary GR Tauri

2002 ◽  
Vol 187 ◽  
pp. 337-338
Author(s):  
A. Yamasaki ◽  
M. Takeda ◽  
T. Yamauchi ◽  
G. Takada ◽  
S. Hattori
Keyword(s):  
Binary System ◽  
The State ◽  
Light Curves ◽  
Close Binary ◽  
Eclipsing Binary ◽  
Short Period ◽  
Contact Binary

AbstractVariability of the light curves of the short-period eclipsing binary system GR Tau (, almost-contact binary) is studied. It is found that GR Tau experienced both the state which is characterized by asymmetric light curves and the state characterized by symmetrical light curves.

The contact binary system YY Eri

1996 ◽  
Vol 246 (2) ◽  
pp. 229-242 ◽  
Author(s):  
E. Budding ◽  
C-H. Kim ◽  
O. Demircan ◽  
Z. Müyesseroğlu ◽  
K. Saijo ◽  
...  
Keyword(s):  
Binary System ◽  
Contact Binary

scholarly journals DISCOVERY OF AN X-RAY-EMITTING CONTACT BINARY SYSTEM 2MASS J11201034−2201340

2016 ◽  
Vol 151 (6) ◽  
pp. 170 ◽  
Author(s):  
Chin-Ping Hu ◽  
Ting-Chang Yang ◽  
Yi Chou ◽  
L. Liu ◽  
S.-B. Qian ◽  
...  
Keyword(s):  
Binary System ◽  
X Ray ◽  
Contact Binary

scholarly journals The early-type near-contact binary system V337 Aql revisited

New Astronomy ◽  
2014 ◽  
Vol 28 ◽  
pp. 44-48 ◽  
Author(s):  
M. Tüysüz ◽  
F. Soydugan ◽  
S. Bilir ◽  
E. Soydugan ◽  
T. Şenyüz ◽  
...  
Keyword(s):  
Binary System ◽  
Early Type ◽  
Contact Binary

scholarly journals A deep, unusual over-contact binary system with high rate of mass transfer: LP Ursa Major

2015 ◽  
Vol 67 (3) ◽  
pp. 48 ◽  
Author(s):  
Wen-Ping Liao ◽  
Sheng-Bang Qian ◽  
Er-Gang Zhao ◽  
Lin-Jia Li
Keyword(s):  
Mass Transfer ◽  
Binary System ◽  
High Rate ◽  
Contact Binary

scholarly journals PHOTOMETRIC OBSERVATIONS OF THE CONTACT BINARY SYSTEM V523 CASSIOPEIAE

2006 ◽  
Vol 23 (3) ◽  
pp. 177-188 ◽  
Author(s):  
Jang-Hae Jeong ◽  
Chun-Hwey Kim ◽  
Yong-Sam Lee
Keyword(s):  
Binary System ◽  
Photometric Observations ◽  
Contact Binary

scholarly journals CK AQR TIME KEEPING. EVIDENCE FOR A THIRD BODY

2020 ◽  
pp. 1-8
Author(s):  
Michel Bonnardeau
Keyword(s):  
Binary System ◽  
Time Travel ◽  
Third Body ◽  
Contact Binary ◽  
Photometric Measurements

Photometric measurements of the contact binary system CK Aqr are presented. 49 new times of minimum were obtained between 2005 and 2020. Along with already published observations, this allows the derivation of an improved ephemeris. The resulting O-C diagram shows oscillations which are interpreted as the light time travel effect due to a third component, with a period of 8.2 years.

scholarly journals The Photometric Investigation of V921 Her Using the Lunar-Based Ultraviolet Telescope of Chang’e-3 Mission

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Xiao Zhou ◽  
Sheng-Bang Qian ◽  
Jia Zhang ◽  
Lin-Jia Li ◽  
Qi-Shan Wang
Keyword(s):  
Binary System ◽  
Thermal Contact ◽  
Primary Star ◽  
Light Minimum ◽  
Evolutionary Scenario ◽  
Total Luminosity ◽  
Massive Component ◽  
Contact Binary ◽  
Photometric Investigation ◽  
First Time

The light curve of V921 Her in ultraviolet band observed by the Lunar-based Ultraviolet Telescope (LUT) is analyzed by the Wilson-Devinney code. Our solutions conclude that V921 Her is an early type marginal contact binary system with an additional close-in component. The binary system is under poor thermal contact with a temperature difference of nearly 700 K between the two components. The close-in component contributes about 19% of the total luminosity in the triple system. Combining the radial velocity study together with our photometric solutions, the mass of the primary star and secondary one is calculated to beM1=1.784  (±0.055)M⊙,M2=0.403  (±0.012)M⊙. The evolutionary scenario of V921 Her is discussed. All times of light minimum of V921 Her available in the bibliography are taken into account and theO-Ccurve is analyzed for the first time. The most probable fitting results are discussed in the paper, which also confirm the existence of a third component (P3=10.2year) around the binary system. The period of V921 Her is also undergoing a continuously rapid increase at a rate ofdP/dt=+2.79×10-7  day·year-1, which may be due to mass transfer from the less massive component to the more massive one.

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