K2-99 revisited: A non-inflated warm Jupiter, and a temperate giant planet on a 522-d orbit around a subgiant
Artikel i vetenskaplig tidskrift, 2022
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.
Planetary systems
Planets and satellites: Individual: K2-99 b
Planets and satellites: Individual: K2-99 c
Planets and satellites: Detection
Författare
Alexis M. S. Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. N. Breton
Université Paris-Saclay
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
F. Dai
California Institute of Technology (Caltech)
D. Gandolfi
Universita degli Studi di Torino
R. A. García
Université Paris-Saclay
A. W. Howard
California Institute of Technology (Caltech)
H. Isaacson
University of California
Judith Korth
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
K. W.F. Lam
Technische Universität Berlin
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. Mathur
Instituto de Astrofísica de Canarias
Universidad de la Laguna
G. Nowak
Instituto de Astrofísica de Canarias
Universidad de la Laguna
F. Pérez Hernández
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Carina Persson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
S. H. Albrecht
Aarhus Universitet
O. Barragán
University of Oxford
J. Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
W. D. Cochran
The University of Texas at Austin
H. J. Deeg
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Malcolm Fridlund
Universiteit Leiden
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Iskra Georgieva
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
E. Gof fo
Universita degli Studi di Torino
Thüringer Landessternwarte Tautenburg
E. W. Guenther
Thüringer Landessternwarte Tautenburg
A. Hatzes
Thüringer Landessternwarte Tautenburg
Petr Kabath
Czech Academy of Sciences
J. H. Livingston
University of Tokyo
R. Luque
Instituto de Astrofisica de Andalucía (IAA)
Enric Palle
Universidad de la Laguna
Instituto de Astrofísica de Canarias
S. Redfield
Wesleyan University
F. Rodler
European Southern Observatory Santiago
L. M. Serrano
Universita degli Studi di Torino
Vincent Van Eylen
University College London (UCL)
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 510 4 5035-5049Ämneskategorier
Astronomi, astrofysik och kosmologi
Atom- och molekylfysik och optik
Annan fysik
DOI
10.1093/mnras/stab3497