The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

korth

Judith Korth

Postdoc

korth

TOI-969 : a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter,

Author

  • J. Lillo-Box
  • D. Gandolfi
  • D. J. Armstrong
  • K. A. Collins
  • L. D. Nielsen
  • R. Luque
  • J. Korth
  • S. G. Sousa
  • S. N. Quinn
  • L. Acuña
  • S. B. Howell
  • G. Morello
  • C. Hellier
  • S. Giacalone
  • S. Hoyer
  • K. Stassun
  • E. Palle
  • A. Aguichine
  • O. Mousis
  • V. Adibekyan
  • T. Azevedo Silva
  • D. Barrado
  • M. Deleuil
  • J. D. Eastman
  • A. Fukui
  • F. Hawthorn
  • J. M. Irwin
  • J. M. Jenkins
  • D. W. Latham
  • A. Muresan
  • N. Narita
  • C. M. Persson
  • A. Santerne
  • N. C. Santos
  • A. B. Savel
  • H. P. Osborn
  • J. Teske
  • P. J. Wheatley
  • J. N. Winn
  • S. C.C. Barros
  • R. P. Butler
  • D. A. Caldwell
  • D. Charbonneau
  • R. Cloutier
  • J. D. Crane
  • O. D.S. Demangeon
  • R. F. Díaz
  • X. Dumusque
  • M. Esposito
  • B. Falk
  • H. Gill
  • S. Hojjatpanah
  • L. Kreidberg
  • I. Mireles
  • A. Osborn
  • G. R. Ricker
  • J. E. Rodriguez
  • R. P. Schwarz
  • S. Seager
  • J. Serrano Bell
  • S. A. Shectman
  • A. Shporer
  • M. Vezie
  • S. X. Wang
  • G. Zhou
Show all

Summary, in English

Context. The current architecture of a given multi-planetary system is a key fingerprint of its past formation and dynamical evolution history. Long-term follow-up observations are key to complete their picture. Aims. In this paper, we focus on the confirmation and characterization of the components of the TOI-969 planetary system, where TESS detected a Neptune-size planet candidate in a very close-in orbit around a late K-dwarf star. Methods. We use a set of precise radial velocity observations from HARPS, PFS, and CORALIE instruments covering more than two years in combination with the TESS photometric light curve and other ground-based follow-up observations to confirm and characterize the components of this planetary system. Results. We find that TOI-969 b is a transiting close-in (Pb ∼ 1.82 days) mini-Neptune planet (Formula Presented), placing it on the lower boundary of the hot-Neptune desert (Teq,b = 941 ± 31 K). The analysis of its internal structure shows that TOI-969 b is a volatile-rich planet, suggesting it underwent an inward migration. The radial velocity model also favors the presence of a second massive body in the system, TOI-969 c, with a long period of (Formula Presented) days, a minimum mass of (Formula Presented), and a highly eccentric orbit of (Formula Presented). Conclusions. The TOI-969 planetary system is one of the few around K-dwarfs known to have this extended configuration going from a very close-in planet to a wide-separation gaseous giant. TOI-969 b has a transmission spectroscopy metric of 93 and orbits a moderately bright (G = 11.3 mag) star, making it an excellent target for atmospheric studies. The architecture of this planetary system can also provide valuable information about migration and formation of planetary systems.

Publishing year

2023-01-01

Language

English

Publication/Series

Astronomy and Astrophysics

Volume

669

Document type

Journal article

Publisher

EDP Sciences

Keywords

  • planets and satellites: composition
  • planets and satellites: detection
  • planets and satellites: fundamental parameters
  • stars: individual: TOI-969
  • techniques: photometric
  • techniques: radial velocities

Status

Published

ISBN/ISSN/Other

  • ISSN: 0004-6361