A New Parameterization for Finding Solutions for Microlensing Exoplanet Light Curves

IF 3.3 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Kylie E. Hall, Jennifer C. Yee, In-Gu Shin, Hongjing Yang and Jiyuan Zhang
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引用次数: 0

Abstract

The gravitational microlensing method of discovering exoplanets and multi-star systems can produce degenerate solutions, some of which require in-depth analysis to uncover. We propose a new parameter space that can be used to sample potential solutions more efficiently and is more robust at finding all degenerate solutions for the “central-resonant” caustic degeneracy. We identified two new parameters, k and h, that can be sampled in place of the mass ratios and separations of the systems under analysis to identify degenerate solutions. The parameter k is related to the size of the central caustic, Δξc, while h is related to the distance of a point along the k contour from log(s) = 0, where s is the projected planet-host separation. In this work, we present the characteristics of these parameters and the tests we conducted to prove their efficacy.
寻找微透镜系外行星光曲线解法的新参数化方法
发现系外行星和多恒星系统的引力微透镜方法会产生退化解,其中一些需要深入分析才能发现。我们提出了一个新的参数空间,可用于更有效地对潜在解进行采样,并能更稳健地找到 "中心共振 "苛性退化的所有退化解。我们确定了两个新参数 k 和 h,它们可以代替被分析系统的质量比和分离度来确定退化解。参数k与中心苛性的大小Δξc有关,而h则与沿k等值线的点与log(s) = 0的距离有关,其中s是投影的行星-宿主分离度。在这项工作中,我们介绍了这些参数的特点,以及为证明其有效性而进行的测试。
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来源期刊
Publications of the Astronomical Society of the Pacific
Publications of the Astronomical Society of the Pacific 地学天文-天文与天体物理
CiteScore
6.70
自引率
5.70%
发文量
103
审稿时长
4-8 weeks
期刊介绍: The Publications of the Astronomical Society of the Pacific (PASP), the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, and is an integral part of the ASP''s mission to advance the science of astronomy and disseminate astronomical information. The journal provides an outlet for astronomical results of a scientific nature and serves to keep readers in touch with current astronomical research. It contains refereed research and instrumentation articles, invited and contributed reviews, tutorials, and dissertation summaries.
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