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arXiv · 1503.06310

The Benchmark Eclipsing Binary V530 Ori: A Critical Test of Magnetic Evolution Models for Low-Mass Stars

Guillermo Torres·Claud H. Sandberg Lacy·Kresimir Pavlovski·Gregory A. Feiden·Jeffrey A. Sabby·Hans Bruntt·Jens Viggo Clausen
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Abstract

We report accurate measurements of the physical properties (mass, radius, temperature) of components of the G+M eclipsing binary V530 Ori. The M-type secondary shows a larger radius and a cooler temperature than predicted by standard stellar evolution models, as has been found for many other low-mass stars and ascribed to the effects of magnetic activity and/or spots. We show that models from the Dartmouth series that incorporate magnetic fields are able to match the observations with plausible field strengths of 1-2 kG, consistent with a rough estimate we derive for that star.

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Guillermo Torres, Claud H. Sandberg Lacy, Kresimir Pavlovski, Gregory A. Feiden, Jeffrey A. Sabby, Hans Bruntt, Jens Viggo Clausen. 2015-03-21. The Benchmark Eclipsing Binary V530 Ori: A Critical Test of Magnetic Evolution Models for Low-Mass Stars. https://arxiv.org/abs/1503.06310

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