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arXiv 1005.0260astro-ph.SR
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GSC 2314-0530：具有dMe成分的最短周期食系统

GSC 2314-0530: the shortest-period eclipsing system with dMe components

D. Dimitrov, D. Kjurkchieva

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10 pages, 11 figures, MNRAS (accepted)
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摘要：

本文介绍了新发现的食双星GSC 2314-0530（NSVS 6550671）的VRI色CCD测光和分光观测结果，该双星具有dMe分量和P=0.192636天的极短周期。同时的光变曲线解和径向速度解允许确定GSC 2314-0530的全局参数：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度; a=1.28 R_sun; d=59件H_α谱线（平均EW= 5A）的强发射和几次耀斑活动揭示了其组成部分的色球活动。根据已知低质量dM双星的参数，导出了质量- M_{bol}、质量-半径和质量-温度的经验关系式。

英文摘要：

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.

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