Absolute properties of the main-sequence eclipsing binary FM Leo

Abstract

First spectroscopic and new photometric observations of the eclipsing binary FM Leo are presented. The main aims were to determine orbital and stellar parameters of two components and their evolutionary stage. First spectroscopic observations of the system were obtained with DDO and PST spectrographs. The results of the orbital solution from radial velocity curves are combined with those derived from the light-curve analysis (ASAS-3 photometry and supplementary observations of eclipses with 1 m and 0.35 m telescopes) to derive orbital and stellar parameters. JKTEBOP, Wilson-Devinney binary modelling codes and a two-dimensional cross-correlation (TODCOR) method were applied for the analysis. We find the masses to be M_1 = 1.318 $\pm$ 0.007 and M_2 = 1.287 $\pm$ 0.007 M_sun, the radii to be R_1 = 1.648 $\pm$ 0.043 and R_2 = 1.511 $\pm$ 0.049 R_sun for primary and secondary stars, respectively. The evolutionary stage of the system is briefly discussed by comparing physical parameters with current stellar evolution models. We find the components are located at the main sequence, with an age of about 3 Gyr.

5 pages, 4 figures, to appear in MNRAS

References in corpus (4)

• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• A Computational Guide to Physics of Eclipsing Binaries. Paper I. Demonstrations and Perspectives
• Eclipsing binaries in open clusters. III. V621 Per in chi Persei
• V440 Per: the longest period overtone Cepheid

Cited by in corpus (8)

• Eclipsing Binary Stars as Benchmarks for Trigonometric Parallaxes in the Gaia Era
• Testing systematics of Gaia DR2 parallaxes with empirical surface brightness -- color relations applied to eclipsing binaries
• The Surface Brightness--Color Relations Based on Eclipsing Binary Stars: Toward Precision Better than 1% in Angular Diameter Predictions
• The surface brightness - colour relations based on eclipsing binary stars and calibrated with Gaia EDR3
• Discovery and characterisation of long-period eclipsing binary stars from Kepler K2 campaigns 1, 2 and 3
• Tracking the spin axes orbital alignment in selected binary systems - Torun Rossiter-McLaughlin effect survey
• Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XII. A sample of systems with $K2$ photometry
• Towards Understanding the Nature of Young Detached Binary System HD 350731