真的存在轨道周期低于1天的偏心食双星吗？
Are there really some eccentric eclipsing binaries having orbital periods below 1 d?
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中文总结 AI 辅助
本研究对超过140个声称周期短于1天的食双星进行系统分析，发现超过98%实为圆轨道，仅两个偏心轨道，其中TIC 1190662偏心率高达0.21，揭示了自动流水线导致的误判问题。
中文摘要 AI 辅助
恒星双星系统是研究动力学的经典工具，而潮汐圆化是其中发生的过程之一。在过去几年中，已有数十个系统被发表，据称其轨道周期短于1天，并且也被发表为具有偏心轨道。这样的构型由于它们空间上的接近，潮汐作用极不可能发生。因此，我们对所有这些食双星（超过140个）进行了彻底分析，表明绝大多数已发表系统（超过98%）实际上是圆形的。特别是，从Gaia DR3星表识别并发表的食双星存在数据不足的问题，约50%的系统其周期推导有误。这种对偏心轨道的大多数错误识别是由于自动流水线和程序在无人检查/验证的情况下运行，也由于大量系统在任一恒星表面存在（演化中的）星斑。在1天周期极限以下仅发现两个偏心轨道，而轨道周期约为0.888天的恒星TIC 1190662具有约0.21的惊人高偏心率。
英文摘要
The stellar binary systems are classical tools for studying dynamics, and tidal circularization is one of the processes taking place in these. During the last few years, several dozen systems have been published supposedly having orbital periods shorter than 1 d, and have also been published as having eccentric orbits. Such a configuration is due to their spatial closeness, and the tides very improbable. Therefore, we performed a thorough analysis of all these eclipsing binaries (>140), showing that the vast majority of the published systems (> 98%) are in fact circular. Especially, the eclipsing binaries identified and published from the Gaia DR3 catalogue suffer from a lack of data, and about 50 per cent had incorrectly derived periods. This mostly incorrect identification of the eccentric orbits is due to automatic pipelines and routines running without human checking/validating, and also due to the large number of systems with (evolving) spots on the surfaces of either of the stars. Only two eccentric orbits were found below the 1-d period limit, while the star TIC 1190662 with an orbital period of about 0.888 d has a surprisingly large value of eccentricity about 0.21.
发表机构
- Charles University, Faculty of Mathematics and Physics, Astronomical Institute（查理大学数学物理学院天体物理研究所）
机构由 AI 辅助整理，请以论文原文为准。
