Journal Article

Absolute properties of the main-sequence eclipsing binary FM Leo

M. Ratajczak, T. Kwiatkowski, A. Schwarzenberg-Czerny, W. Dimitrov, M. Konacki, K. G. Hełminiak, P. Bartczak, M. Fagas, K. Kamiński, P. Kankiewicz, W. Borczyk and A. Rożek

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 402, issue 4, pages 2424-2428
Published in print March 2010 | ISSN: 0035-8711
Published online March 2010 | e-ISSN: 1365-2966 | DOI:
Absolute properties of the main-sequence eclipsing binary FM Leo

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First spectroscopic and new photometric observations of the eclipsing binary FM Leo are presented. The main aims were to determine the orbital and stellar parameters of the two components and their evolutionary stage. First spectroscopic observations of the system were obtained with the David Dunlap Observatory and Poznań Spectroscopic Telescope spectrographs. The results of the orbital solution from radial velocity curves are combined with those derived from the light-curve analysis (V-band photometry from the All Sky Automated Survey and supplementary observations of eclipses with the 1 and 0.35 m telescopes) to derive orbital and stellar parameters. jktebop, Wilson–Devinney binary modelling codes and a two-dimensional cross-correlation method were applied for the analysis. We find the masses to be M1= 1.318 ± 0.007 and M2= 1.287 ± 0.007 M and the radii to be R1= 1.648 ± 0.043 and R2= 1.511 ± 0.049 R 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 that the components are located at the main sequence, with an age of about 3 Gyr.

Keywords: techniques: radial velocities; binaries: eclipsing; binaries: spectroscopic; stars: fundamental parameters; stars: individual: FM Leo

Journal Article.  2645 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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