• K. Li

Articles written in Journal of Astrophysics and Astronomy

• Discovery of a Faint Eclipsing Binary GSC 02265-01456

When observing the transiting extrasolar planets, we found a new eclipsing binary named GSC 02265-01456. The 𝑉 and 𝑅c observations were carried out for this binary. The photometric light curves of the two bands were simultaneously analyzed using the W–D code. The solutions show that GSC 02265-01456 is an extremely low mass ratio (𝑞 = 0.087) overcontact binary system with a contact degree of 𝑓 = 82.5%. The difference between the two maxima of the light curve can be explained by a dark spot on the primary component.

• Photometric Analysis and Period Investigation of the EW Type Eclipsing Binary V441 Lac

Four color light curves of the EW type eclipsing binary V441Lac were presented and analyzed by the W--D code. It is found that V441Lac is an extremely low mass ratio $(q = 0.093 \pm 0.001)$ semi-detached binary with the less massive secondary component filling the inner Roche lobe. Two dark spots on the primary component were introduced to explain the asymmetric light curves. By analyzing all times of light minimum, we determined that the orbital period of V441 Lac is continuously increasing at a rate of ${\rm d}P/{\rm d}t = 5.874(\pm 0.007)\times 10^{--7} {\rm d yr}^{--1}$. The semidetached Algol type configuration of V441 Lac is possibly formed by a contact configuration destroyed shallow contact binary due to mass transfer from the less massive component to the more massive one predicted by the thermal relaxation oscillation theory.

• # Journal of Astrophysics and Astronomy

Current Issue
Volume 40 | Issue 6
December 2019

• # Continuous Article Publication

Posted on January 27, 2016

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