Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.220..107e&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 220, no. 1, p. 107-113
Astronomy and Astrophysics
Astrophysics
2
Astronomical Models, Binary Stars, Mass Ratios, Parameter Identification, Radial Velocity, Astronomical Photometry, Astronomical Spectroscopy, Charge Coupled Devices, Light Curve, Reflecting Telescopes
Scientific paper
The photometric observations of EP Cep, from Kaluzny and Shara (1987), were analyzed by the Wilson and Devinney method. The appropriate value of the mass ratio of this system was found after extensive searches. EP Cep has a semi-detached configuration where the lower-mass component is in contact with its respective Roche surface. The higher-mass component very nearly fills its Roche lobe. It is very close to being a critical configuration. The mass ratio of the system is about 1.292 and the inclination is 66.942 deg. EP Cep has the characteristic of a W-type WUMa system. The absolute dimensions for the primary and secondary of this system were calculated from its spectral types and by combining the photometric solution with inferred component radial velocities (Baliunas and Guinan, 1985).
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