The Benchmark Eclipsing Binary V530 Ori: A Critical Test of Magnetic Evolution Models for Low-Mass Stars
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.
Cite
@article{arxiv.1503.06310,
title = {The Benchmark Eclipsing Binary V530 Ori: A Critical Test of Magnetic Evolution Models for Low-Mass Stars},
author = {Guillermo Torres and Claud H. Sandberg Lacy and Kresimir Pavlovski and Gregory A. Feiden and Jeffrey A. Sabby and Hans Bruntt and Jens Viggo Clausen},
journal= {arXiv preprint arXiv:1503.06310},
year = {2015}
}
Comments
5 pages, to appear in the Proceedings of the meeting "Living Together: Planets, host stars and binaries", Litomysl, Czech Republic (Sept 8-12, 2014), ASP Conf. Ser., eds. Slavek M. Rucinski, Guillermo Torres and Miloslav Zejda