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24 April 2024

» arxiv » 2004.7783

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TOI-1338: TESS' First Transiting Circumbinary Planet
Veselin B. Kostov ; Jerome A. Orosz ; Adina D. Feinstein ; William F. Welsh ; Wolf Cukier ; Nader Haghighipour ; Billy Quarles ; David V. Martin ; Benjamin T. Montet ; Guillermo Torres ; Amaury H.M.J. Triaud ; Thomas Barclay ; Patricia Boyd ; Cesar Briceno ; Andrew Collier Cameron ; Alexandre C.M. Correia ; Emily A. Gilbert ; Samuel Gill ; Michael Gillon ; Jacob Haqq-Misra ; Coel Hellier ; Courtney Dressing ; Daniel C. Fabrycky ; Gabor Furesz ; Jon Jenkins ; Stephen R. Kane ; Ravi Kopparapu ; Vedad Kunovac Hodzic ; David W. Latham ; Nicholas Law ; Alan M. Levine ; Gongjie Li ; Chris Lintott ; Jack J. Lissauer ; Andrew W. Mann ; Tsevi Mazeh ; Rosemary Mardling ; Pierre F.L. Maxted ; Nora Eisner ; Francesco Pepe ; Joshua Pepper ; Don Pollacco ; Samuel N. Quinn ; Elisa V. Quintana ; Jason F. Rowe ; George Ricker ; Mark E. Rose ; Sara Seager ; Alexandre Santerne ; Damien Segransan ; Donald R. Short ; Jeffrey C. Smith ; Matthew R. Standing ; Andrei Tokovinin ; Trifon Trifonov ; Oliver Turner ; Joseph D. Twicken ; Stephane Udry ; Roland Vanderspek ; Joshua N. Winn ; Eric T. Wolf ; Carl Ziegler ; Peter Ansorge ; Frank Barnet ; Joel Bergeron ; Marc Huten ; Giuseppe Pappa ; Timo van der Straeten ;
Date:	16 Apr 2020
Abstract:	We report the detection of the first circumbinary planet found by TESS. The target, a known eclipsing binary, was observed in sectors 1 through 12 at 30-minute cadence and in sectors 4 through 12 at two-minute cadence. It consists of two stars with masses of 1.1 MSun and 0.3 MSun on a slightly eccentric (0.16), 14.6-day orbit, producing prominent primary eclipses and shallow secondary eclipses. The planet has a radius of ~6.9 REarth and was observed to make three transits across the primary star of roughly equal depths (~0.2%) but different durations -- a common signature of transiting circumbinary planets. Its orbit is nearly circular (e ~ 0.09) with an orbital period of 95.2 days. The orbital planes of the binary and the planet are aligned to within ~1 degree. To obtain a complete solution for the system, we combined the TESS photometry with existing ground-based radial-velocity observations in a numerical photometric-dynamical model. The system demonstrates the discovery potential of TESS for circumbinary planets, and provides further understanding of the formation and evolution of planets orbiting close binary stars.
Source:	arXiv, 2004.7783
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