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korth

Judith Korth

Postdoc

korth

K2-99 revisited : A non-inflated warm Jupiter, and a temperate giant planet on a 522-d orbit around a subgiant

Author

  • A. M.S. Smith
  • S. N. Breton
  • Sz. Csizmadia
  • F. Dai
  • D. Gandolfi
  • R. A. García
  • A. W. Howard
  • H. Isaacson
  • J. Korth
  • K. W.F. Lam
  • S. Mathur
  • G. Nowak
  • F. Pérez Hernández
  • C. M. Persson
  • S. H. Albrecht
  • O. Barragán
  • J. Cabrera
  • W. D. Cochran
  • H. J. Deeg
  • M. Fridlund
  • I. Y. Georgie v a
  • E. Goffo
  • E. W. Guenther
  • A. P. Hatzes
  • P. Kabath
  • J. H. Livingston
  • R. Luque
  • E. Palle
  • S. Redfield
  • F. Rodler
  • L. M. Serrano
  • V. Van Eylen
Show all

Summary, in English

We report new photometric and spectroscopic observations of the K2-99 planetary system. Asteroseismic analysis of the short-cadence light curve from K2's Campaign 17 allows us to refine the stellar properties. We find K2-99 to be significantly smaller than previously thought, with R = 2.55 ± 0.02 R. The new light curve also contains four transits of K2-99 b, which we use to improve our knowledge of the planetary properties. We find the planet to be a non-inflated warm Jupiter, with Rb = 1.06 ± 0.01 RJup. 60 new radial velocity measurements from HARPS, HARPS-N, and HIRES enable the determination of the orbital parameters of K2-99 c, which were previously poorly constrained. We find that this outer planet has a minimum mass Mcsin ic = 8.4 ± 0.2 MJup, and an eccentric orbit (ec = 0.210 ± 0.009) with a period of 522.2 ± 1.4 d. Upcoming TESS observations in 2022 have a good chance of detecting the transit of this planet, if the mutual inclination between the two planetary orbits is small.

Publishing year

2022-03-01

Language

English

Pages

5035-5049

Publication/Series

Monthly Notices of the Royal Astronomical Society

Volume

510

Issue

4

Document type

Journal article

Publisher

Oxford University Press

Keywords

  • Planetary systems
  • Planets and satellites: Detection
  • Planets and satellites: Individual: K2-99 b
  • Planets and satellites: Individual: K2-99 c

Status

Published

ISBN/ISSN/Other

  • ISSN: 0035-8711