标题： 大麦哲伦云中 massive 次食双星系统 HV 2543 的质量和半径测定 显示英文标题

标题： Determination of Masses and Radii of the Massive Eclipsing Binary System HV 2543 in the Large Magellanic Cloud

摘要： 我们基于1995年至1998年间获得的CCD图像，展示了大麦哲伦云中掩食双星系统HV 2543（Sk-67 117）的V波段光变曲线。我们分析了该光变曲线和已发表的径向速度数据，发现该系统为半接触系统，次级成分（质量较小且较暗弱的成分）充满其洛希瓣。通过使用Wilson-Devinney代码的分析，我们估计HV 2543各成分的质量和半径如下：M1=25.63 ± 0.7，R1=15.54 ± 0.4，M2=15.63 ± 1.0和R2=13.99 ± 0.4，单位为太阳单位。根据场星的B和V测光数据，我们发现HV 2543是OB星协的一员，可能与属于该星协的Sk-67 105这个大质量双星系统相关。 显示英文摘要

摘要： We present a V light curve of the eclipsing binary system HV 2543 (Sk-67 117) in the Large Magellanic Cloud based on CCD images acquired between the years 1995 and 1998. We have analysed this light curve and published radial velocity data, finding that this system is semidetached, with the secondary (less massive and less luminous component) filling its Roche lobe. From our analysis with the Wilson-Devinney code, we estimated the following masses and radii for the components of HV 2543: M1=25.63 +- 0.7, R1=15.54 +- 0.4, M2=15.63 +- 1.0 and R2=13.99 +- 0.4, in solar units. On the basis of B and V photometry of the field stars, we found that HV 2543 is member of an OB association, perhaps related to which the massive binary system Sk-67 105 belongs.