Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ap%26ss.323...75k&link_type=abstract
Astrophysics and Space Science, Volume 323, Issue 1, pp.75-81
Astronomy and Astrophysics
Astrophysics
1
Stars: Binaries: Eclipsing, Stars: Individual: V453 Mon, Stars: Individual: V523 Cas, Stars: Fundamental Parameters
Scientific paper
We present multi-colour CCD observations of the low-temperature contact binaries, V453 Mon and V523 Cas. Their light curves are modelled to determine a new set of stellar and orbital parameters. Analysis of mid-eclipse times yields a new linear ephemeris for both systems. A period decrease ( dP/ dt=2.3×10-7 days/yr) in V453 Mon is discovered. V523 Cas, however, is detected to show a period increase ( dP/ dt=9.8×10-8 days/yr) because of the mass transfer of a rate of 1.1×10-7 M&sun; yr-1, from a less massive donor. Using these findings we can determine the physical parameters of the components of V523 Cas to be M 1=0.76 (3) M &sun;, M 2=0.39 (2) M &sun;, R 1=0.74 (2) R &sun;, R 2=0.55 (2) R &sun;, L 1=0.19 (3) L &sun;, L 2=0.14 (3) L &sun;, and the distance of system as 46(9) pc.
Keskin Varol
Kose O.
Yakut Kadri
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