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arXiv 0809.3747astro-ph
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B星双星HD 42401的系统参数

System Parameters for the Eclipsing B-Star Binary HD 42401

S. J. Williams

摘要:

我目前的结果,从光学光谱研究的二元系统HD 42401(V1388猎户座; B2.5 IV-V + B3 V)。对V波段测光和径向速度的综合分析表明,该系统的轨道周期为2.18706 +/- 0.00005天,倾角为75.5 +/- 0.2度。这个解产生的质量和半径为M1 = 7.42 +/- 0.08太阳质量和R1 = 5.60 +/- 0.04太阳半径的主要和M2 = 5.16 +/- 0.03太阳质量和R2 = 3.76 +/- 0.03太阳半径的次要。根据这两颗恒星在理论H-R图上的位置,我发现该系统的年龄大于2500万年,并且与单星演化轨迹相比,这两颗恒星的质量显得过于明亮。根据文献中的光度测量法拟合光谱能量分布,得出HD 42401的距离为832 +/- 89秒差距。

英文摘要:

I present results from an optical spectroscopic investigation of the binary system HD 42401 (V1388 Ori; B2.5 IV-V + B3 V). A combined analysis of V-band photometry and radial velocities indicates that the system has an orbital period of 2.18706 +/- 0.00005 days and an inclination of 75.5 +/- 0.2 degrees. This solution yields masses and radii of M1 = 7.42 +/- 0.08 Solar Masses and R1 = 5.60 +/- 0.04 Solar Radii for the primary and M2 = 5.16 +/- 0.03 Solar Masses and R2 = 3.76 +/- 0.03 Solar Radii for the secondary. Based on the position of the two stars plotted on a theoretical H-R diagram, I find that the age of the system is > 25 Myr and that both stars appear overluminous for their masses compared to single star evolutionary tracks. A fit of the spectral energy distribution based on photometry from the literature yields a distance to HD 42401 of 832 +/- 89 parsecs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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