Starspots in contact and semi-detached binary systems
Starspots in contact and semi-detached binary systems
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DOI：
10.1093/pasj/psy140
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发表时间：
2018-12
影响因子：
2.3
通讯作者：
S. Kouzuma
中科院分区：
文献类型：
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作者：
S. Kouzuma
我们研究了食双星中冷星斑和热星斑的统计特性。接触和半分离系统的星点和二元参数从文献中收集，并在合成光曲线分析的基础上确定。我们研究了这些参数之间的关联。结果表明，W型双星中的冷斑具有类似于太阳黑子和发电机产生的星斑的性质，而不同于A型双星中的冷斑。热点的性质也不同的W型和A型样品之间。从A型和W型双星的物理性质可以推断，质量传递是A型双星热点形成的主要过程，质量传递和磁活动都对W型双星热点的形成有贡献。我们的研究结果还表明，在A型样本的热点大小与斑点星的温度，轨道周期，质量比，和填充因子。
We investigated the statistical properties of both cool and hot starspots in eclipsing binary stars. The starspot and binary parameters for contact and semi-detached systems were collected from literature, which were determined on the basis of synthetic light-curve analysis. We examined associations between these parameters. As a result, the cool spots in W-type binaries show properties similar to those of sunspots and starspots generated by dynamos, which differs from those of the cool spots in A-type binaries. The properties of hot spots also differ between the W- and A-type samples. From the physical properties of A- and W-type binaries, we infer that mass transfer is a dominant process for forming the hot spots in A-type binaries; and both mass transfer and magnetic activity can contribute to the formation of the hot spots in W-type binaries. Our results also indicate that the hot-spot size in the A-type sample is correlated with the temperature of spotted stars, orbital period, mass ratio, and fill-out factor.