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arXiv 1306.0512astro-ph.SR
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开普勒观测双星。IV。密近双星的精确食时和候选三体系统的识别

Kepler Eclipsing Binary Stars. IV. Precise Eclipse Times for Close Binaries and Identification of Candidate Three-Body Systems

Kyle E. Conroy, Andrej Prsa, Keivan G. Stassun, Jerome A. Orosz, Daniel C. Fabrycky, William F. Welsh

摘要:

本文给出了最新的开普勒近距离双星表中1279颗近距离双星的精确食时表和第三体信号分析。对于这些短周期双星,开普勒30分钟的曝光时间会导致光变曲线的明显模糊。此外,常见的天体物理现象,如色球活动,以及光变曲线去趋势过程中的不完美,可能会产生系统性的伪影,可能会在日食计时中产生虚构的信号。我们提出了一种方法来测量精确的日食时间在扭曲的光变曲线的存在下,如在接触和近接触的双星表现出不断变化的光级和日食。236系统,我们发现一个定时变化信号与第三个机构的存在是兼容的。这些模型的光的时间旅行的影响和第三机构的基本属性推导出来。这项研究补充了Orosz et al.(2013;准备中),该研究侧重于具有平坦的食外区域的较长周期双星的日食时间变化。这两篇论文一起为开普勒双星目录中的所有双星提供了全面的日食时间,作为社区在线免费访问的持续资源。

英文摘要:

We present a catalog of precise eclipse times and analysis of third body signals among 1279 close binaries in the latest Kepler Eclipsing Binary Catalog. For these short period binaries, Kepler's 30 minute exposure time causes significant smearing of light curves. In addition, common astrophysical phenomena such as chromospheric activity, as well as imperfections in the light curve detrending process, can create systematic artifacts that may produce fictitious signals in the eclipse timings. We present a method to measure precise eclipse times in the presence of distorted light curves, such as in contact and near-contact binaries which exhibit continuously changing light levels in and out of eclipse. 236 systems for which we find a timing variation signal compatible with the presence of a third body are identified. These are modeled for the light time travel effect and the basic properties of the third body are derived. This study complements Orosz et al. (2013; in prep), which focuses on eclipse timing variations of longer period binaries with flat out-of-eclipse regions. Together, these two papers provide comprehensive eclipse timings for all binaries in the Kepler Eclipsing Binary Catalog, as an ongoing resource freely accessible online to the community.

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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