Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-05-03
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
10 pages, 11 figures, MNRAS (accepted)
Scientific paper
CCD photometric observations in VRI colors and spectroscopic observations of the newly discovered eclipsing binary GSC 2314-0530 (NSVS 6550671) with dMe components and very short period of P=0.192636 days are presented. The simultaneous light-curve solution and radial velocity solution allows to determine the global parameters of GSC 2314-0530: T_{1}=3735 K; T_{2}=3106 K; M_{1}=0.51 M_sun; M_{2}=0.26 M_sun; R_{1}=0.55 R_sun; R_{2}=0.29 R_sun; L_{1}=0.053 L_sun; L_{2}=0.007 L_sun; i=72.5 degr; a=1.28 R_sun; d=59 pc. The chromospheric activity of its components is revealed by strong emission in the H_alpha line (with mean EW=5 A) and observed several flares. Empirical relations mass-M_{bol}, mass-radius and mass-temperature are derived on the basis of the parameters of known binaries with low-mass dM components.
Dimitrov Darko
Kjurkchieva Diana
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