A Compact Multi-Planet System of Three Transiting Giant Planets Around TIC118798035
Rafael Brahm, Trifon Trifonov, Andr\'es Jord\'an, Thomas Henning, N\'estor Espinoza, Felipe I. Rojas, Marcelo Tala Pinto, Mat\'ias I. Jones, Daniel Thorngren, Lorena Acu\~na, Jan Eberhardt, Yared Reinarz, Helem Salinas, Michaela V\'itkov\'a, Juan I. Espinoza-Retamal

TL;DR
This paper reports the discovery and detailed characterization of a unique three-planet transiting system around TIC118798035, including their masses, radii, and orbital dynamics, revealing unusual metallicity patterns and potential for future atmospheric research.
Contribution
The study presents the first detailed characterization of a three-planet system with more than two transiting giant planets, including orbital fitting and metallicity analysis.
Findings
Three transiting giant planets with well-measured masses and radii.
Detection of transit timing variations indicating dynamic interactions.
Unusual metallicity patterns suggesting different formation histories.
Abstract
We report the discovery and characterization of three transiting giant planets in the TIC118798035 system. The three planets were identified as transiting candidates from data of the TESS mission, and confirmed with ground-based photometric transit observations along with radial velocity variations obtained with FEROS, HARPS and ESPRESSO. The three planets present transit timing variations (TTVs). We performed a N-body orbital fitting to the TTVs and radial velocities finding that TIC118798035 b is as warm low-density Neptune with a mass of 0.02500.0023 , a radius of 0.6550.018 , and an orbital period of 11.507 d; TIC118798035 c is a warm Saturn with a mass of 0.4030.024 , a radius of 0.9730.023 , and an orbital period of 22.564 d; and TIC118798035 d is a warm Jupiter with a mass of 0.7730.052 , a radius of 0.9230.044 , and an…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astro and Planetary Science
