TOI-1130: A photodynamical analysis of a hot Jupiter in resonance with an inner low-mass planet
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The TOI-1130 is a known planetary system around a K-dwarf consisting of a gas giant planet, TOI-1130 c on an 8.4-day orbit that is accompanied by an inner Neptune-sized planet, TOI-1130 b, with an orbital period of 4.1 days. We collected precise radial velocity (RV) measurements of TOI-1130 with the HARPS and PFS spectrographs as part of our ongoing RV follow-up program. We performed a photodynamical modeling of the HARPS and PFS RVs, along with transit photometry from the Transiting Exoplanet Survey Satellite (TESS) and the TESS Follow-up Observing Program (TFOP). We determined the planet masses and radii of TOI-1130 b and TOI-1130 c to be Mb = 19.28 ± 0.97M⊕ and Rb = 3.56 ± 0.13 R⊕, and Mc = 325.59 ± 5.59M⊕ and Rc = 13.32−1.41+1.55 R⊕, respectively. We have spectroscopically confirmed the existence of TOI-1130 b, which had previously only been validated. We find that the two planets have orbits with small eccentricities in a 2:1 resonant configuration. This is the first known system with a hot Jupiter and an inner lower mass planet locked in a mean-motion resonance. TOI-1130 belongs to the small, yet growing population of hot Jupiters with an inner low-mass planet that poses a challenge to the pathway scenario for hot Jupiter formation. We also detected a linear RV trend that is possibly due to the presence of an outer massive companion.
Korth , J , Gandolfi , D , Šubjak , J , Howard , S , Ataiee , S , Collins , K A , Quinn , S N , Mustill , A J , Guillot , T , Lodieu , N , Smith , A M S , Esposito , M , Rodler , F , Muresan , A , Abe , L , Albrecht , S H , Alqasim , A , Barkaoui , K , Beck , P G , Burke , C J , Butler , R P , Conti , D M , Collins , K I , Crane , J D , Dai , F , Deeg , H J , Evans , P , Grziwa , S , Hatzes , A P , Hirano , T , Horne , K , Huang , C X , Jenkins , J M , Kabáth , P , Kielkopf , J F , Knudstrup , E , Latham , D W , Livingston , J , Luque , R , Mathur , S , Murgas , F , Osborne , H L M , Pallé , E , Persson , C M , Rodriguez , J E , Rose , M , Rowden , P , Schwarz , R P , Seager , S , Serrano , L M , Sha , L , Shectman , S A , Shporer , A , Srdoc , G , Stockdale , C , Tan , T G , Teske , J K , Van Eylen , V , Vanderburg , A , Vanderspek , R , Wang , S X & Winn , J N 2023 , ' TOI-1130: A photodynamical analysis of a hot Jupiter in resonance with an inner low-mass planet ' , Astronomy & Astrophysics , vol. 675 , A115 . https://doi.org/10.1051/0004-6361/202244617
Astronomy & Astrophysics
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DescriptionFunding: J.K. gratefully acknowledges the support of the Swedish National Space Agency (SNSA; DNR 2020-00104) and of the Swedish Research Council (VR: Etablerings-bidrag 2017-04945). A.M. and C.M.P. gratefully acknowledge the support of the Swedish National Space Agency (SNSA; DNR 2020-00104, 177/19, 174/18, and 65/19). M.E. acknowledges the support of the DFG priority program SPP 1992 “Exploring the Diversity of Extrasolar Planets” (HA 3279/12-1). J.S. and P.K. acknowledge support from the MSMT grant LTT-20015. J.S. would like to acknowledge support from the Grant Agency of Charles University: GAUK No. 314421. R.L. acknowledges funding from University of La Laguna through the Margarita Salas Fellowship from the Spanish Ministry of Universities ref. UNI/551/2021-May 26, and under the EU Next Generation funds. S.M. acknowledges support by the Spanish Ministry of Science and Innovation with the Ramon y Cajal fellowship number RYC-2015-17697 and the grant number PID2019-107187GB-I00. From the same source, H.J.D. acknowledges grant PID2019-107061GB-C66. N.L. acknowledges support from the Agencia Estatal de Investigación del Ministerio de Ciencia e Innovación (AEI-MCINN) under grant PID2019-109522GB-C53. This work is partly supported by JSPS KAKENHI Grant Numbers JP19K14783 and JP21H00035. A.J.M. acknowledges support from the Swedish National Space Agency (grant 120/19C) and the Swedish Research Council (grant 2017-04945).
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