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Abstract: Eclipsing binary star systems provide the most accurate method of measuringboth the masses and radii of stars. Moreover, they enable testing tidalsynchronization and circularization theories, as well as constraining models ofstellar structure and dynamics. With the recent availability of large-scalemulti-epoch photometric datasets we were able to study eclipsing binary starsen masse. In this thesis, we analyzed 185,445 light curves from ten TrESfields, and 218,699 light curves from the OGLE II bulge fields. In order tomanage such large quantities of data, we developed a pipeline with which wesystematically identified eclipsing binaries, solved for their geometricorientations, and then found their components- absolute properties. Followingthis analysis we assembled catalogs of eclipsing binaries with their models,computed statistical distributions of their properties, and located rare casesfor further follow-up, including T-Cyg1-03378, which has unusual eclipse timingvariations. Of particular importance are low-mass eclipsing binaries, which arerare yet critical for resolving the ongoing mass-radius discrepancy betweentheoretical models and observations. To this end, we have discovered over adozen new low-mass eclipsing binary candidates and spectroscopically confirmedthe masses of five of them. One of these confirmed candidates, T-Lyr1-17236, isespecially interesting because of its long orbital period. We examinedT-Lyr1-17236 in detail and found that it is consistent with the magneticdisruption hypothesis. Both the source code of our pipeline and the completelist of our candidates are freely available.

Autor: Jonathan Devor

Fuente: https://arxiv.org/

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