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Judith Korth



TOI-1130: A photodynamical analysis of a hot Jupiter in resonance with an inner low-mass planet


  • J. Korth
  • D. Gandolfi
  • J. Šubjak
  • S. Howard
  • S. Ataiee
  • K. A. Collins
  • S. N. Quinn
  • A. J. Mustill
  • T. Guillot
  • N. Lodieu
  • A. M. S. Smith
  • M. Esposito
  • F. Rodler
  • A. Muresan
  • L. Abe
  • S. H. Albrecht
  • A. Alqasim
  • K. Barkaoui
  • P. G. Beck
  • C. J. Burke
  • R. P. Butler
  • D. M. Conti
  • K. I. Collins
  • J. D. Crane
  • F. Dai
  • H. J. Deeg
  • P. Evans
  • S. Grziwa
  • A. P. Hatzes
  • T. Hirano
  • K. Horne
  • C. X. Huang
  • J. M. Jenkins
  • P. Kabáth
  • J. F. Kielkopf
  • E. Knudstrup
  • D. W. Latham
  • J. Livingston
  • R. Luque
  • S. Mathur
  • F. Murgas
  • H. L. M. Osborne
  • E. Palle
  • C. M. Persson
  • J. E. Rodriguez
  • M. Rose
  • P. Rowden
  • R. P. Schwarz
  • S. Seager
  • L. M. Serrano
  • L. Sha
  • S. A. Shectman
  • A. Shporer
  • G. Srdoc
  • C. Stockdale
  • T.-G. Tan
  • J. K. Teske
  • V. Van Eylen
  • A. Vanderburg
  • R. Vanderspek
  • S. X. Wang
  • J. N. Winn

Summary, in English

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.


  • Astrophysics

Publishing year





Astronomy & Astrophysics



Document type

Journal article


EDP Sciences


  • Astronomy, Astrophysics and Cosmology


  • planetary systems
  • planets and satellites: individual: TOI-1130
  • techniques: photometric
  • techniques: radial velocities
  • Astrophysics - Earth and Planetary Astrophysics




  • Consolidating CHEOPS and preparing for PLATO: Exoplanet studies in the 2020s
  • A unified picture of white dwarf planetary systems


  • ISSN: 1432-0746