Hinse, Tobias Cornelius and Lee, Jae Woo and Gozdziewski, Krzysztof and Horner, Jonathan and Wittenmyer, Robert A. (2014) Revisiting the proposed circumbinary multiplanet system NSVS 14256825. Monthly Notices of the Royal Astronomical Society, 438 (1). pp. 307-317. ISSN 0035-8711
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Abstract
In this work, we carry out an analysis of the observed times of primary and secondary eclipses of the post-common envelope binary NSVS 14256825. Recently, Almeida, Jablonski and Rodrigues proposed that two circumbinary companions orbit this short-period eclipsing binary, in order to explain observed variations in the timing of mutual eclipses between the two binary components. Using a standard weighted least-squares minimization technique, we have extensively explored the topology of χ2 parameter space of a single planet model. We find the data set to be insufficient to reliably constrain a one-companion model. Various models, each with similar statistical significance, result in substantially different orbital architectures for the additional companion. No evidence is seen for a second companion of planetary nature. We suspect insufficient coverage (baseline) of timing data causing the best-fitting parameters to be unconstrained.
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