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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引用次数: 0
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.
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.