First Multicolor Photometry of 1SWASP J130111.22+420214.0 and 1SWASP J231839.72+352848.2

B. Ulas; R. Michel; S. Silva

doi:10.1016/j.newast.2018.03.002

paper

First Multicolor Photometry of 1SWASP J130111.22+420214.0 and 1SWASP J231839.72+352848.2

arXiv:1803.07273 · doi:10.1016/j.newast.2018.03.002

Abstract

The first multicolor observations and light curve solutions of the stars 1SWASP J130111.22+420214.0 and 1SWASP J231839.72+352848.2 are presented. The estimated physical parameters of 1SWASP J130111.22+420214.0 are $M_{1} = 1.0 M_{⊙}$ , $M_{2} = 1.63 M_{⊙}$ , $R_{1} = 0.77 R_{⊙}$ , $R_{2} = 0.91 R_{⊙}$ , $L_{1} = 0.59 L_{⊙}$ , and $L_{2} = 0.68 L_{⊙}$ . While a binary model could not be fitted to the light curve of 1SWASP J231839.72+352848.2, its Fourier series representation indicates that this system could well be a rotating ellipsoidal variable. The components of 1SWASP J130111.22+420214.0 are also compared to other well--known binary systems and their position in mass--radius plane and the Hertzsprung--Russel diagram are argued and possible evolutionary statuses are discussed.

17 pages, 5 figures. Accepted for publication in New Astronomy