Corrections and improvements in the effectiveness and extension of the applicability range of the model WINK of eclipsing binaries.
Errors and inconsistencies still present in the program WINK (even after the corrections and improvements of all the WINK status Reports - WSR - now at the no. 10) have been detected and corrected. Mo difications of the program have been implemented in order to improve the effectiveness of the model during the solution of the inverse problem of finding the parameters of a system from the light curves - Other mo difications are introduced in order t extend the validity range of the model to closer and more deformed systems. They are: a) a control (and eventual limitation) of the sizes of components; b) introduction of the 4th and 5th order terms of Chandrasekhar's equations in the definition of the semi-major axes of the ellipsoids which represent the stars; and c) a more exact calculation of the local gravity in the treatment of the gravity darkening. Such an extension does not enable WINK to analyse semi-detached or closer systems due to the geometrical assumptions of the model (ellipsoidal stars). owever after the introduction of the cited modifications, the WINK solutions for such systems become much closer to the solutions produced by models which are more realistic geometrically (eg. the Wilson-Devinney model) than the solutions produced by the original WINK model.
Revista Mexicana de Astronomia y Astrofisica, vol. 12
- Pub Date:
- February 1986