scholarly journals Symbiotic Eclipsing Binary Star CI CYG. The Cold Component Variability

1988 ◽  
Vol 103 ◽  
pp. 197-197
Author(s):  
T.S. Belyakina
Keyword(s):  
Binary System ◽  
Variable Star ◽  
Binary Star ◽  
Time Interval ◽  
Temperature Variations ◽  
Eclipsing Binary ◽  
Cold Component ◽  
Red Giant ◽  
Eclipsing Binary Star

AbstractIt has been shown that the cold component of CI Cyg eclipsing binary system is a variable star. The amplitude of its light variations is close to with the time interval of 40–60 days.This star being the red giant M4 can be attributed as SR type variability. The light variations is caused by its temperature variations.

Stripped red giant cores in eclipsing binary star systems

2013 ◽  
Vol 64 ◽  
pp. 353-359
Author(s):  
P.F.L. Maxted ◽  
U. Heber ◽  
B. Smalley ◽  
T.R. Marsh
Keyword(s):  
Binary Star ◽  
Eclipsing Binary ◽  
Red Giant ◽  
Eclipsing Binary Star

Absolute Properties of the Eclipsing Binary Star RW Lacertae

2005 ◽  
Vol 130 (6) ◽  
pp. 2838-2846 ◽  
Author(s):  
Claud H. Sandberg Lacy ◽  
Guillermo Torres ◽  
Antonio Claret ◽  
Luiz Paulo Ribeiro Vaz
Keyword(s):  
Binary Star ◽  
Eclipsing Binary ◽  
Eclipsing Binary Star

scholarly journals The dynamical mass of a classical Cepheid variable star in an eclipsing binary system

Nature ◽  
2010 ◽  
Vol 468 (7323) ◽  
pp. 542-544 ◽  
Author(s):  
G. Pietrzyński ◽  
I. B. Thompson ◽  
W. Gieren ◽  
D. Graczyk ◽  
G. Bono ◽  
...  
Keyword(s):  
Binary System ◽  
Variable Star ◽  
Dynamical Mass ◽  
Eclipsing Binary ◽  
Classical Cepheid

Absolute Properties of the Main-Sequence Eclipsing Binary Star WW Camelopardalis

2002 ◽  
Vol 123 (2) ◽  
pp. 1013-1022 ◽  
Author(s):  
Claud H. Sandberg Lacy ◽  
Guillermo Torres ◽  
Antonio Claret ◽  
Jeffrey A. Sabby
Keyword(s):  
Main Sequence ◽  
Binary Star ◽  
Eclipsing Binary ◽  
Eclipsing Binary Star

ABSOLUTE PROPERTIES OF THE ECLIPSING BINARY STAR V335 SERPENTIS

2012 ◽  
Vol 144 (2) ◽  
pp. 63 ◽  
Author(s):  
Claud H. Sandberg Lacy ◽  
Francis C. Fekel ◽  
Antonio Claret
Keyword(s):  
Binary Star ◽  
Eclipsing Binary ◽  
Eclipsing Binary Star

scholarly journals The TESS light curve of the eccentric eclipsing binary 1SWASP J011351.29+314909.7 – no evidence for a very hot M-dwarf companion

2020 ◽  
Vol 498 (1) ◽  
pp. L15-L19
Author(s):  
Matthew I Swayne ◽  
Pierre F L Maxted ◽  
Vedad Kunovac Hodžić ◽  
Amaury H M J Triaud
Keyword(s):  
Light Curve ◽  
Effective Temperature ◽  
Binary Star ◽  
Mass Star ◽  
Primary Star ◽  
Eclipsing Binary ◽  
Low Mass ◽  
Stellar Models ◽  
Eclipsing Binary Star ◽  
M Dwarf

ABSTRACT A 2014 study of the eclipsing binary star 1SWASPJ011351.29+314909.7 (J0113+31) reported an unexpectedly high effective temperature for the M-dwarf companion to the 0.95-M⊙ primary star. The effective temperature inferred from the secondary eclipse depth was ∼600 K higher than the value predicted from stellar models. Such an anomalous result questions our understanding of low-mass stars and might indicate a significant uncertainty when inferring properties of exoplanets orbiting them. We seek to measure the effective temperature of the M-dwarf companion using the light curve of J0113+31 recently observed by the Transiting Exoplanet Survey Satellite (TESS). We use the pycheops modelling software to fit a combined transit and eclipse model to the TESS light curve. To calculate the secondary effective temperature, we compare the best-fitting eclipse depth to the predicted eclipse depths from theoretical stellar models. We determined the effective temperature of the M dwarf to be Teff,2 = 3208 ± 43 K, assuming log g2 = 5, [Fe/H] = −0.4, and no alpha-element enhancement. Varying these assumptions changes Teff,2 by less than 100 K. These results do not support a large anomaly between observed and theoretical low-mass star temperatures.

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