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Judith Korth



TOI-199 b : A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica


  • Melissa J. Hobson
  • Trifon Trifonov
  • Thomas Henning
  • Andrés Jordán
  • Felipe Rojas
  • Nestor Espinoza
  • Rafael Brahm
  • Jan Eberhardt
  • Matías I. Jones
  • Djamel Mekarnia
  • Diana Kossakowski
  • Martin Schlecker
  • Marcelo Tala Pinto
  • Pascal José Torres Miranda
  • Lyu Abe
  • Khalid Barkaoui
  • Philippe Bendjoya
  • François Bouchy
  • Marco Buttu
  • Ilaria Carleo
  • Karen A. Collins
  • Knicole D. Colón
  • Nicolas Crouzet
  • Diana Dragomir
  • Georgina Dransfield
  • Thomas Gasparetto
  • Robert F. Goeke
  • Tristan Guillot
  • Maximilian N. Günther
  • Saburo Howard
  • Jon M. Jenkins
  • Judith Korth
  • David W. Latham
  • Monika Lendl
  • Jack J. Lissauer
  • Christopher R. Mann
  • Ismael Mireles
  • George R. Ricker
  • Sophie Saesen
  • Richard P. Schwarz
  • S. Seager
  • Ramotholo Sefako
  • Avi Shporer
  • Chris Stockdale
  • Olga Suarez
  • Thiam Guan Tan
  • Amaury H.M. Amaury
  • Solène Ulmer-Moll
  • Roland Vanderspek
  • Joshua N. Winn
  • Bill Wohler
  • George Zhou

Summary, in English

We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a full 6.5 hr long transit, PEST, Hazelwood, and LCO; space photometry from NEOSSat; and radial velocities (RVs) from FEROS, HARPS, CORALIE, and CHIRON. Orbiting a late G-type star, TOI-199 b has a 104.854 − 0.002 + 0.001 day period, a mass of 0.17 ± 0.02 M J, and a radius of 0.810 ± 0.005 R J. It is the first warm exo-Saturn with a precisely determined mass and radius. The TESS and ASTEP transits show strong transit timing variations (TTVs), pointing to the existence of a second planet in the system. The joint analysis of the RVs and TTVs provides a unique solution for the nontransiting companion TOI-199 c, which has a period of 273.69 − 0.22 + 0.26 days and an estimated mass of 0.28 − 0.01 + 0.02 M J . This period places it within the conservative habitable zone.


  • Lund Observatory - Has been reorganised
  • Astrophysics

Publishing year





Astronomical Journal





Document type

Journal article


IOP Publishing


  • Astronomy, Astrophysics and Cosmology




  • ISSN: 0004-6256