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arXiv 1602.01467astro-ph.SR
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早型接触双星的周期-亮度-颜色关系

Period-Luminosity-Colour Relation for Early-Type Contact Binaries

Michal Pawlak

摘要:

这项工作描述了OGLE-III巡天发现的大麦云云中64个早期型大质量接触或近接触食系统的分析。它提出了确定的周期,光度,颜色关系遵循这些对象,这是不同于以前已知的晚型W UMa星。大质量恒星的关系对颜色的依赖性明显更陡,这与更高的热辐射校正有关,但在周期项中它较浅。由此得出的结论是,主序星接触双星的总星群是非线性的。当分别研究时,平行接触和近接触系统遵循两种略有不同的关系。

英文摘要:

This work describes the analysis of 64 early-type, massive contact or near-contact eclipsing systems from the Large Magellanic Cloud discovered by the OGLE-III survey. It presents the determination of the period-luminosity-colour relation followed by these objects, that is different from the one previously known for late-type W UMa stars. The relation for massive stars has a significantly steeper dependence on the colour, which is related to a much higher bolometric correction, however it is shallower in the period term. This leads to the conclusion, that the relation for the total population of main sequence contact binaries is non-linear. When studied separately, genuinely-contact and near-contact systems follow two slightly different relations.

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