On the Orbital Period Modulation of the Eclipsing Binary System Y Leonis

Details On the Orbital Period Modulation of the Eclipsing Binary System Y Leonis On the Orbital Period Modulation of the Eclipsing Binary System Y Leonis

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..335..263p&link_type=abstract

The Light-Time Effect in Astrophysics, Proceedings of ASP Conference Series, Vol. 335, held in Brussels 19-22 July 2004. Edited

Astronomy and Astrophysics

Astrophysics

5

Scientific paper

The analysis of the available times of primary minimum light on the Algol binary system Y Leonis revealed a complex behaviour of its O-C curve that results from the superposition of a secular trend, a multiperiodic component consisting in four periodicities [85.2 yr (with four periodic terms), 8.606 yr, 7.781 yr, and 6.375 yr] having incommensurable frequencies, and a low level stochastic variability displaying a positive serial correlation. The mechanism causing the longest periodicity seems to be rather the cyclic magnetic activity of the secondary component, than the light-time effect due to the presence of an unseen companion.

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