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Analysis of eclipsing binaries in multiple stellar systems: the case of V1200 Centauri

Marcadon, Frédéric; Helminiak, Krzysztof G; Marques, Joao P; Pawlaszek, Rafal; Sybilski, Piotr; Kozlowski, Stanislaw K; Ratajczak, Milena; Konacki, Maciej


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    <subfield code="a">Analysis of eclipsing binaries in multiple stellar systems: the case of V1200 Centauri</subfield>
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    <subfield code="a">&lt;p&gt;We present a new analysis of the multiple star V1200 Centauri based on the most recent observations for this system. We used the photometric observations from the Solaris network and the TESS telescope, combined with the new radial velocities from the CHIRON spectrograph and those published in the literature. We confirmed that V1200 Cen consists of a 2.5-day eclipsing binary orbited by a third body. Regarding the third body, we obtained significantly different results than previously published. Indeed, we argue that V1200 Cen is a quadruple system with a secondary pair composed of two low-mass stars. We also determined the ages of each eclipsing component using two evolution codes, namely MESA and CESTAM. We obtained ages of 16-18.5 Myr and 5.5-7 Myr for the primary and the secondary, respectively. In particular, the secondary appears larger and hotter than predicted at the age of the primary. Finally, we concluded that dynamical and tidal interactions occurring in multiples may alter the stellar properties and explain the apparent non-coevality of V1200 Cen.&lt;/p&gt;

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