On the Period Variation of the W UMa-type Contact Binary V502 Ophiuchi

Details On the Period Variation of the W UMa-type Contact Binary V502 Ophiuchi On the Period Variation of the W UMa-type Contact Binary V502 Ophiuchi

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006chjaa...6..331l&link_type=abstract

Chinese Journal of Astronomy and Astrophysics, Volume 6, Issue 3, pp. 331-337 (2006).

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

The variation in the orbital period of the W UMa type contact binary V502 Oph is analyzed. The orbital period exhibits a wavelike variation with a periodicity of 23.0 years and an amplitude of ΔP = 1.24×10-6 days superimposed on secular decrease of dP/dt = 1.68×10-7 day per year. The long-term decrease may be accompanied by the contraction of the secondary at a rate of 83 m per year and a mass transfer rate from the primary to the secondary of 4.28×10-8Modot per year. The short-term oscillation may be explained by the presence of a third component. Orbital elements of the third body and its possible mass are presented.

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