Physical parameters and multiplicity of five southern close eclipsing binaries

Szalai, T
Kiss, L L
Mészáros, S
Vinko, J
Csizmadia, S

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Publication date

January 2007

DOI

10.1051/0004-6361:20066768

ISSN

0004-6361

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Abstract

Aims: Detect tertiary components of close binaries from spectroscopy and light curve modelling; investigate light-travel time effect and the possibility of magnetic activity cycles; measure mass-ratios for unstudied systems and derive absolute parameters. Methods: We carried out new photometric and spectroscopic observations of five bright (V<10.5 mag) close eclipsing binaries, predominantly in the southern skies. We obtained full Johnson BV light curves, which were modelled with the Wilson-Devinney code. Radial velocities were measured with the cross-correlation method using IAU radial velocity standards as spectral templates. Period changes were studied with the O-C method, utilising published epochs of minimum light (XY Leo) and ASAS pho...