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arXiv 2207.06255astro-ph.SR
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两个接触双星:CRTS J025408.1 + 265957和CRTS J012111.1 + 272933的光度学研究

A photometric study of two contact binaries: CRTS J025408.1+265957 and CRTS J012111.1+272933

S. Ma, J. Z. Liu, Y. Zhang, Q. S. Hu, G. L. Lv

摘要:

我们对两个接触双星进行了新的光度观测(即,CRTS J025408.1 + 265957和CRTS J012111.1 + 272933)。从我们的光变曲线和一些调查数据,我们得出了几套光度解决方案。我们发现CRTS J025408.1 + 265957和CRTS J012111.1 + 272933分别为A型和W型WUMa。结果表明,在两个接触双星中,黑子发生了迁移或消失,这两个双星是由LAMOST光谱中的色球活动发射(如H α发射)确定的。从O-C曲线可以看出,两个接触双星的轨道周期可能是增加的,这是由质量较小的组分向质量较大的组分的质量转移解释的。在质量转移的作用下,两个接触双星可以从接触构型演化为半探测构型,这与热弛豫振荡理论的预言一致。

英文摘要:

We performed new photometric observations for two contact binaries (i.e., CRTS J025408.1+265957 and CRTS J012111.1+272933), which were observed by the 1.0-m telescope at Xingjiang Astronomical Observatory. From our light curves and several survey data, we derived several sets of photometric solutions. We found that CRTS J025408.1+265957 and CRTS J012111.1+272933 were Aand W-type W UMa, respectively. The results imply that the spot migrates or disappears in two contact binaries, which were identified by chromospheric activity emissions (e.g. Hα emission) from LAMOST spectra. From the O-C curves, the orbital periods of two contact binaries may be increasing, which is interpreted by the mass transfer from the less massive component to the more massive one. With mass transferring, two contact binaries may evolve from the contact configurations to semi-detected ones as predicted by the theory of thermal relaxation oscillation.

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