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arXiv 2209.00765astro-ph.SRastro-ph.HE
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LAMOST对4个$K$ 2板块的时域巡天发现的可能具有致密组分的双星

Binaries with possible compact components discovered from the LAMOST Time-Domain Survey of four $K$2 plates

Li Xue, Wang Song, Zhao Xinlin, Bai Zhongrui, Yuan Hailong, Zhang Haotong, Liu Jifeng

摘要:

来自大天区多目标光纤光谱望远镜(LAMOST)的时域(TD)光谱数据可以提供准确和高节奏的径向速度(RV)。在这项工作中,我们使用四个$K$ 2板的LAMOST TD巡天,用RV监测方法寻找具有致密组分的双星。我们发现了三个双星系统,其中包括一颗看不见的白矮星或中子星,对每个双星系统,我们估计了可见星的恒星参数和轨道参数,最后计算了双星的质量函数和看不见星的最小质量。从三个源的LAMOST中分辨率光谱中没有看到明显的双线特征。此外,我们发现没有X射线对应的所有这些来源,但紫外同伴为其中两个。光谱解缠也显示没有额外的组件与光学吸收光谱,支持这些系统包含紧凑的对象。

英文摘要:

Time-domain (TD) spectroscopic data from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) can provide accurate and high-cadence radial velocities (RVs). In this work, we search for binaries with compact components with RV monitoring method by using the LAMOST TD survey of four $K$2 plates. Three binary systems including an unseen white dwarf or neutron star are found. For each binary system, we estimate the stellar parameters of the visible star and orbital parameters, and finally calculate the binary mass function and the minimum mass of the unseen star. No obvious double-lined feature is seen from the LAMOST medium-resolution spectra of the three sources. In addition, we found no X-ray counterpart for all these sources but UV companions for two of them. Spectral disentangling also shows no additional component with optical absorption spectra, supporting that these systems contain compact objects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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