不相接双星的相互照射吸收和子星表面温度的变化

Mutual Irradiation and Absorption in Detached Binary Systems and Surface Temperature Variation

本文对不相接双星系统的子星间相互照射吸收进行了计算，从理论上得到子星的表面温度分布情况．对已知基本参数的３３个晚型双星系统中的反映子星等温面和等势面偏离程度的量进行了统计．结果表明，冷子星上等温面和等势面的偏离程度普遍较热子星的要大，该结果支持了Ｚｈｏｕ和Ｌｅｕｎｇ所提出的用气旋和反气旋来解释恒星黑子和太阳黑子巨大差别的可能性．本文还考虑了临边昏暗效应在晚型双星系统中对子星之间相互照射吸收的影响，这种影响达１８％以上．临边昏暗效应对热子星的影响普遍比冷子星要大．

In the paper, we calculate the absorbed flux of the mutual irradiation of the components in detached binary systems, and obtain the surface temperature distribution on the components. The maximum temperature difference over the surface is a measure of the deviation between isothermal and equipotential surfaces. For 33 late type binary systems with known elements, we evaluate this maximum difference. The result shows that the isothermal equipotential deviation is always larger in the cooler than in the hotter components. This result supports Zhou and Leung's idea that the large difference between ``star spots'' and sunspots is due to cyclones and anticyclones. The effect of limb darkening (amounting to over 18% and always larger in the hotter component) is included in the consideration.