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| Paper: |
Physical Parameters of Eclipsing Binary Stars from the ASAS-3 Database |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
937 |
| Authors: |
Singh, H. P.; Deb, S. |
| Abstract: |
Eclipsing binaries are important astronomical targets for determining the
physical parameters of component stars and an independent direct method
of measuring the radii of stars. We present a detailed light curve analysis of
publicly available V band observations of 62 binary stars, mostly contact
binaries, obtained by the All Sky Automated Survey (ASAS)-3 project between
2000 and 2009. We re-determined the periods, ephemeris and the Fourier
parameters from the phased light curves which were then used for preliminary
classification of the stars. The phased light curves were further analysed
with the aid of the Wilson-Devinney code in order to obtain various geometrical
and physical parameters of these binaries. The spectroscopic mass ratios as
determined from the radial velocity measurements available in the literature
were used as one of the inputs to the light curve modelling. Thus reliable
estimates of parameters of these binaries were obtained with combined
photometric and spectroscopic data and error estimates were made using the
heuristic scan method. Out of 62 stars in the sample, photometric analysis of
39 stars are presented for the first time using the ASAS photometry and
precise spectroscopic mass ratios. From the analysis, we found 54 contact
binaries, 6 semi-detached binaries and 2 detached binaries. |
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