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    • The First Study of the Short Period Contact Binary V415 Gem

    Bin Zhang, Yidan Gao

    New Astronomy（2024）

    Guizhou Normal Univ

    Cited 2|Views4
    Abstract
    The photometric study of the short period contact binary V415 Gem are performed for the first time. We discovered that it is a W-subtype shallow contact binary with a mass ratio of q = 2.297 and a contact degree of f = 3.6%. The light curves of the target exhibit an O’Connell effect, we attached a cool star-spot on its primary component for better fitting results. At the same time, the third light was found during our analysis by using the 2015 version of the Wilson-Devinney (W−D) code. And the average luminosity contribution of the third light is 44% of the total light. Besides, the O−C curve of V415 Gem exhibits a cyclic variation, which is due to the light-travel time effect caused by the presence of a third component with an amplitude of 0.0033 days and a period of 11.5 years. The mass of the third body is estimated to be M3∼1.08M⊙.
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    Key words
    Eclipsing binary,Contact binaries,Light curve,Orbital period
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