Journal
ASTRONOMICAL JOURNAL
Volume 162, Issue 6, Pages -Publisher
IOP Publishing Ltd
DOI: 10.3847/1538-3881/ac1bbe
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Funding
- NASA's Science Mission directorate
- NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center
- DFG [FOR2544, RE 2694/4-1]
- Hong Kong RGC [HKU 17305618]
- ANID-Millennium Science Initiative [ICN12_009]
- FONDECYT project [1210718]
- CONICYT-PFCHA/Doctorado Nacional, Chile [21140646, 21191829]
- MIT's Kavli Institute as a Kavli postdoctoral fellow
- TESS Guest Investigator Program [80NSSC19K1727]
- NASA Exoplanet Research Program [18-2XRP18 2-0136]
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TOI-2202 b is a transiting warm Jovian-mass planet discovered through TESS mission data, possibly with an outer Saturn-mass companion. The system is unique with two planets near the 2:1 mean motion resonance, posing challenges to understanding their formation and dynamical evolution.
TOI-2202 b is a transiting warm Jovian-mass planet with an orbital period of P = 11.91 days identified from the Full Frame Images data of five different sectors of the TESS mission. Ten TESS transits of TOI-2202 b combined with three follow-up light curves obtained with the CHAT robotic telescope show strong transit timing variations (TTVs) with an amplitude of about 1.2 hr. Radial velocity follow-up with FEROS, HARPS, and PFS confirms the planetary nature of the transiting candidate (a (b) = 0.096 +/- 0.001 au, m (b) = 0.98 +/- 0.06 M (Jup)), and a dynamical analysis of RVs, transit data, and TTVs points to an outer Saturn-mass companion (a (c) = 0.155 +/- 0.002 au, m (c) = 0.37 +/- 0.10 M (Jup)) near the 2:1 mean motion resonance. Our stellar modeling indicates that TOI-2202 is an early K-type star with a mass of 0.82 M (circle dot), a radius of 0.79 R (circle dot), and solar-like metallicity. The TOI-2202 system is very interesting because of the two warm Jovian-mass planets near the 2:1 mean motion resonance, which is a rare configuration, and their formation and dynamical evolution are still not well understood.
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