TRIPLE-STAR CANDIDATES AMONG THE KEPLER BINARIES
TRIPLE-STAR CANDIDATES AMONG THE KEPLER BINARIES
复制标题
DOI：
10.1088/0004-637x/768/1/33
复制
发表时间：
2013-02
期刊：
影响因子：
--
通讯作者：
S. Rappaport;K. Deck;A. Levine;T. Borkovits;J. Carter;I. El Mellah;R. Sanchis-Ojeda;B. Kalomeni-B.-Kalomen
中科院分区：
文献类型：
--
作者：
S. Rappaport;K. Deck;A. Levine;T. Borkovits;J. Carter;I. El Mellah;R. Sanchis-Ojeda;B. Kalomeni-B.-Kalomen
我们介绍了搜索的结果。根据恒定周期模型的所有2157个二进制文件的日食时间。为了在消除误差率和二进制期之间的the频率和二进制期间，请找到三星级的候选者。从经典的Roemer延迟和所谓的物理延迟中进行的贡献，试图提取三重系统的系统参数。 ，例如，基于对三星级系统的轨道周期有限的范围，该搜索是敏感的，我们可以推断出至少20％的所有亲密二进制物具有第三级伴侣。
We present the results of a search through the photometric database of Kepler eclipsing binaries looking for evidence of hierarchical triple-star systems. The presence of a third star orbiting the binary can be inferred from eclipse timing variations. We apply a simple algorithm in an automated determination of the eclipse times for all 2157 binaries. The “calculated” eclipse times, based on a constant period model, are subtracted from those observed. The resulting O − C (observed minus calculated times) curves are then visually inspected for periodicities in order to find triple-star candidates. After eliminating false positives due to the beat frequency between the ∼1/2 hr Kepler cadence and the binary period, 39 candidate triple systems were identified. The periodic O − C curves for these candidates were then fit for contributions from both the classical Roemer delay and so-called physical delay, in an attempt to extract a number of the system parameters of the triple. We discuss the limitations of the information that can be inferred from these O − C curves without further supplemental input, e.g., ground-based spectroscopy. Based on the limited range of orbital periods for the triple-star systems to which this search is sensitive, we can extrapolate to estimate that at least 20% of all close binaries have tertiary companions.