Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..92..203g&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 92, no. 1, May 1983, p. 203-222.
Astronomy and Astrophysics
Astrophysics
82
Apsides, Eccentric Orbits, Eclipsing Binary Stars, Orbital Elements, Stellar Motions, Computer Programs, Equations Of Motion, Fourier Transformation, Stellar Models, Stellar Structure, Taylor Series
Scientific paper
In this paper, a new method for the determination of apsidal motion parameters in eccentric eclipsing binaries is presented. A sequential procedure has been followed throughout allowing an automatized on-line computation of the elements and their accuracies as well as a more realistic fit to the observed times of minima. A determination of individual mean errors for the parameters of fit give us the possibility to compare the results with available theoretical models of stellar structure. In the procedure, a determination of preliminary elements by means of Fourier transform is introduced and the practical equations are extended to terms up to the fifth power of the eccentricity. An application to the well-known case of the eclipsing binary GL Car has been made. The analysis shows an apsidal motion period of 25.3 years with a value of 0.152 for the orbital eccentricity.
Garcia-Pelayo Jose Manuel
Gimenez Alvaro
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