Enhancing Exoplanet Ephemerides by Leveraging Professional and Citizen Science Data: A Test Case with WASP-77 A b

IF 3.3 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Publications of the Astronomical Society of the Pacific Pub Date : 2024-07-03 DOI:10.1088/1538-3873/ad57f5
Federico R. Noguer, Suber Corley, Kyle A. Pearson, Robert T. Zellem, Molly N. Simon, Jennifer A. Burt, Isabela Huckabee, Prune C. August, Megan Weiner Mansfield, Paul A. Dalba, Peter C. B. Smith, Timothy Banks, Ira Bell, Dominique Daniel, Lindsay Dawson, Jesús De Mula, Marc Deldem, Dimitrios Deligeorgopoulos, Romina P. Di Sisto, Roger Dymock, Phil Evans, Giulio Follero, Martin J. F. Fowler, Eduardo Fernández-Lajús, Alex Hamrick, Nicoletta Iannascoli, Andre O. Kovacs, Denis Henrique Kulh, Claudio Lopresti, Antonio Marino, Bryan E. Martin, Paolo Arcangelo Matassa, Tasso Augusto Napoleão, Alessandro Nastasi, Anthony Norris, Alessandro Odasso, Nikolaos I. Paschalis, Pavel Pintr, Jake Postiglione, Justus Randolph, François Regembal, Lionel Rousselot, Sergio José Gonçalves da Silva, Andrew Smith and Andrea Tomacelli
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Abstract

We present an updated ephemeris, and physical parameters, for the exoplanet WASP-77 A b. In this effort, we combine 64 ground- and space-based transit observations, 6 space-based eclipse observations, and 32 radial velocity observations to produce this target's most precise orbital solution to date aiding in the planning of James Webb Space Telescope and Ariel observations and atmospheric studies. We report a new orbital period of 1.360029395 ± 5.7 × 10−8 days, a new mid-transit time of 2459957.337860 ± 4.3 × 10−5 Barycentric Julian Date in the Barycentric Dynamical Timescale (BJDTDB) and a new mid-eclipse time of 2459956.658192 ± 6.7 × 10−5 BJDTDB. Furthermore, the methods presented in this study reduce the uncertainties in the planet's mass 1.6654 ± 4.5 × 10−3MJup and orbital period 1.360029395 ± 5.7 × 10−8 days by factors of 15.1 and 10.9, respectively. Through a joint fit analysis comparison of transit data taken by space-based and citizen science-led initiatives, our study demonstrates the power of including data collected by citizen scientists compared to a fit of the space-based data alone. Additionally, by including a vast array of citizen science data from ExoClock, Exoplanet Transit Database, and Exoplanet Watch, we can increase our observational baseline and thus acquire better constraints on the forward propagation of our ephemeris than what is achievable with Transiting Exoplanet Survey Satellite data alone.
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利用专业和公民科学数据增强系外行星星历表:WASP-77 测试案例 A b
在这项工作中,我们将64次地基和天基凌日观测、6次天基日食观测以及32次径向速度观测结合起来,得出了该目标迄今为止最精确的轨道解,从而为詹姆斯-韦伯太空望远镜和阿里尔观测以及大气研究的规划提供了帮助。我们报告的新轨道周期为 1.360029395 ± 5.7 × 10-8 天,新的中轨时间为 2459957.337860 ± 4.3 × 10-5 巴里中心动态时标中的巴里中心朱利安日期(BJDTDB),新的中食时间为 2459956.658192 ± 6.7 × 10-5 BJDTDB。此外,本研究提出的方法还将行星质量 1.6654 ± 4.5 × 10-3MJup 和轨道周期 1.360029395 ± 5.7 × 10-8 天的不确定性分别降低了 15.1 和 10.9 倍。通过联合拟合分析比较天基和公民科学主导的过境数据,我们的研究表明,与单独拟合天基数据相比,将公民科学家收集的数据包括在内更有说服力。此外,通过纳入来自ExoClock、系外行星凌日数据库和系外行星观测站的大量公民科学数据,我们可以提高观测基线,从而获得比单独使用凌日系外行星巡天卫星数据更好的星历前向传播约束条件。
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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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