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LOW-MASS ECLIPSING BINARIES IN THE INITIAL KEPLER DATA RELEASE

机译:初始开普勒数据发布中的低质量遗漏二进制

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We identify 231 objects in the newly released Cycle 0 data set from the Kepler Mission as double-eclipse, detached eclipsing binary systems with T eff 5500?K and orbital periods shorter than ~32?days. We model each light curve using the JKTEBOP code with a genetic algorithm to obtain precise values for each system. We identify 95 new systems with both components below 1.0 M ☉ and eclipses of at least 0.1?mag, suitable for ground-based follow-up. Of these, 14 have periods less than 1.0?day, 52 have periods between 1.0 and 10.0?days, and 29 have periods greater than 10.0?days. This new sample of main-sequence, low-mass, double-eclipse, detached eclipsing binary candidates more than doubles the number of previously known systems and extends the sample into the completely heretofore unexplored P 10.0?day period regime. We find preliminary evidence from these systems that the radii of low-mass stars in binary systems decrease with period. This supports the theory that binary spin-up is the primary cause of inflated radii in low-mass binary systems, although a full analysis of each system with radial-velocity and multi-color light curves is needed to fully explore this hypothesis. Also, we present seven new transiting planet candidates that do not appear among the list of 706 candidates recently released by the Kepler team, or in the Kepler False Positive Catalog, along with several other new and interesting systems. We also present novel techniques for the identification, period analysis, and modeling of eclipsing binaries.
机译:我们从开普勒任务中新发布的周期0数据集中将231个对象识别为双月食,T eff <5500?K且轨道周期短于〜32?天的分离式月食双星系统。我们使用遗传算法使用JKTEBOP代码对每个光曲线建模,以获取每个系统的精确值。我们确定了95个新系统,其两个分量均低于1.0 M☉,且日食的幅度至少为0.1?mag,适用于地面跟踪。其中14个周期小于1.0天的周期,52个周期在1.0到10.0天之间,29个周期大于10.0天。这个新的主要序列,低质量,双蚀,分离食蚀二元候选物样本使以前已知系统的数目增加了一倍以上,并将样本扩展到了迄今尚未探索的P> 10.0?天周期范围。我们从这些系统中发现了初步的证据,即双星系统中低质量恒星的半径随周期减小。这支持了这样一种理论,即二进制旋转是低质量二进制系统中半径膨胀的主要原因,尽管需要对每个具有径向速度和多色光曲线的系统进行全面分析才能充分探索这一假设。同样,我们提出了七个新的过境行星候选者,以及一些其他新的有趣的系统,这些候选者没有出现在开普勒团队最近发布的706个候选列表中或开普勒假阳性目录中。我们还提出了新的技术,用于日食二进制文件的识别,周期分析和建模。

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