Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pasj...62.1109l&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.62, No.4, pp.1109--1116
Astronomy and Astrophysics
Astronomy
Stars: Binaries: Close, Stars: Binaries: Eclipsing, Stars: Individuals (Wy Persei, Rw Leonis), Stars: Multiple
Scientific paper
WY Per and RW Leo are two Algol-type binaries. Based on our new CCD observations and the almost century-long historical record of the times of primary eclipses for WY Per and RW Leo, the orbital period changes and their explanations were reanalyzed and rediscussed in detail. It has been found that the orbital period of WY Per shows a cyclic oscillation with a period of P3 = 71.5 yr and a semiamplitude of A3 = 0.d0739. The period variation can be interpreted by the light-travel time effect (LTTE) via the presence of a third body in an eccentric orbit with an eccentricity of e3 ≃ 0.602 in the system. For RW Leo, its orbital period shows complex variations. Two cyclic variations (i.e., P3 = 77.8 yr and A3 = 0.d033, and P4 = 39.1 yr and A4 = 0.d022) were discovered. The cyclic variations of P3 = 77.8 yr and A3 = 0.d033 can be attributed to the LTTE via the presence of a third body in an eccentric orbit with an eccentricity of e3 ≃ 0.732.
Liao Wen Ping
Qian Sheng Bang
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