Eclipsing binary science via the merging of transit and doppler exoplanet survey data - a case study with the marvels pilot project and SuperWASP

Abstract

Exoplanet transit and Doppler surveys discover many binary stars during their operation that can be used to conduct a variety of ancillary science. Specifically, eclipsing binary stars can be used to study the stellar mass–radius relationship and to test predictions of theoretical stellar evolution models. By cross-referencing 24 binary stars found in theMARVELS Pilot Project with SuperWASP photometry, we find two new eclipsing binaries, TYC 0272-00458-1 and TYC 1422-01328-1, whichwe use as case studies to develop a general approach to eclipsing binaries in survey data.TYC0272-00458-1 is a single-lined spectroscopic binary for whichwe calculate amass of the secondary and radii for both components using reasonable constraints on the primary mass through several different techniques. For a primary mass ofM1 = 0.92±0.1M ,we findM2 = 0.610±0.036M ,R1 = 0.932±0.076R , and R2 = 0.559 ± 0.102R , and find that both stars have masses and radii consistent with model predictions. TYC 1422-01328-1 is a triple-component system for which we can directly measure the masses and radii of the eclipsing pair. We find that the eclipsing pair consists of an evolved primary star (M1 = 1.163 ± 0.034M , R1 = 2.063 ± 0.058R ) and a G-type dwarf secondary (M2 = 0.905 ± 0.067M , R2 = 0.887 ± 0.037R ). We provide the framework necessary to apply this analysis to much larger data sets.