| 大陵五型食双星CI Aur的测光解和它的光变频谱分析 |
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| 引用本文： | 刘学富,李志安,梁鉴澄,谭徽松.大陵五型食双星CI Aur的测光解和它的光变频谱分析[J].中国天文和天体物理学报,1990(1). |
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| 作者姓名： | 刘学富 李志安 梁鉴澄 谭徽松 |
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| 作者单位： | 北京师范大学天文系
(刘学富，李志安)，美国尼布拉斯卡大学物理天文系
(梁鉴澄)，中国科学院云南天文台(谭徽松) |
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| 摘 要： | 本文发表了1984年11月至1985年1月期间在美国McDonald天文台对大陵五型食双星CI Aur进行的UBV测光结果,以及采用Wilson-Devinney方法求解出它的轨道要素。结果表明CI Aur是一个半分离的双星系统,它的次星充满了Roche瓣,而主星离它的Roche等位面相离很远。两颗子星温度相差很大,质量比为0.687,轨道倾角i为74.42°。 CI Aur的光变曲线呈现随机的亮度“抖动”和明显的光变起伏。作者采用了自迴归功率谱方法和调和分析方法对它的光变起伏进行了频谱分析,求出了振荡的准周期和振幅。文章最后讨论了它的两种模型。
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| 关 键 词： | 食双星 测光轨道解 频谱分析 |
PHOTOMETRIC SOLUTIONS AND ANALYSIS FOR AN ALGOL TYPE BINARY CI AUR |
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| Liu Xuefu Li Zhi''''an.PHOTOMETRIC SOLUTIONS AND ANALYSIS FOR AN ALGOL TYPE BINARY CI AUR[J].Chinese Journal of Astronomy and Astrophysics,1990(1). |
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| Authors: | Liu Xuefu Li Zhi'an |
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| Abstract: | CI Aur is a short-period Algol type eclipsing binary with a period of 1.870052 days. Photoelectric observations in UBV system were made at McDonald Observatory from November 1984 to January 1985. The UBV light curves show some random flickering and short-time variations.The photometric solutions were analyzed by the Wilson-Devinney approaches. CI Aur is: a semidetached system, with the less massive component (secondary star) filling its Roche lobe. The mass ratio is 0.687 and its orbital inclination is 74: 42.Autoregressive power spectral analysis and harmonic analysis for the light curves of CI Aur were made. The results demonstrate that the oscillations are multiple quasi-periodic and have low amplitudes.The gas stream from the secondary star of CI Aur strikes the trailing hemisphere of the-primary star. The disk, produced by the star-stream interaction, is instable.We have discussed two models of CI Aur. |
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