Mass determination of two Jupiter-sized planets orbiting slightly evolved stars: TOI-2420 b and TOI-2485 b
Journal article, 2024
Context. Hot and warm Jupiters might have undergone the same formation and evolution path, but the two populations exhibit different distributions of orbital parameters. This challenges our understanding of their actual origin. Aims. We report the results of our warm Jupiters survey, which was carried out with the CHIRON spectrograph within the KESPRINT collaboration. We addressed the question of the population origin by studying two planets that might help to bridge the gap between the two populations. Methods. We confirm two planets and determine their mass. One is a hot Jupiter (with an orbital period shorter than 10 days), TOI-2420 b, and the other is a warm Jupiter, TOI-2485 b. We analyzed them using a wide variety of spectral and photometric data in order to characterize these planetary systems. Results. We found that TOI-2420 b has an orbital period of Pb = 5.8 days, a mass of Mb = 0.9 MJ, and a radius of Rb = 1.3 RJ, with a planetary density of 0.477 g cm-3. TOI-2485 b has an orbital period of Pb = 11.2 days, a mass of Mb = 2.4 MJ, and a radius of Rb = 1.1 RJ with a density of 2.36 g cm-3. Conclusions. With the current parameters, the migration history for TOI-2420 b and TOI-2485 b is unclear: Scenarios of a high-eccentricity migration cannot be ruled out, and the characteristics of TOI-2485 b even support this scenario.
Planets and satellites: gaseous planets
Planets and satellites: detection
Author
Ilaria Carleo
Instituto de Astrofísica de Canarias
University of La Laguna
Istituto nazionale di astrofisica (INAF)
O. Barragán
University of Oxford
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Malcolm Fridlund
Leiden University
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
K. W.F. Lam
German Aerospace Center (DLR)
Sergio Messina
Istituto nazionale di astrofisica (INAF)
D. Gandolfi
University of Turin
A. M.S. Smith
German Aerospace Center (DLR)
M.C. Johnson
Ohio State University
William Cochran
The University of Texas at Austin
H. L.M. Osborne
University College London (UCL)
European Southern Observatory (ESO)
Rafael Brahm
Adolfo Ibáñez University
Millennium Institute of Astrophysics
D. R. Ciardi
National Aeronautics and Space Administration (NASA)
Karen A. Collins
Harvard-Smithsonian Center for Astrophysics
M.E. Everett
NOIRLab
S. Giacalone
California Institute of Technology (Caltech)
E. W. Guenther
Thüringer Landessternwarte Tautenburg
A. Hatzes
Thüringer Landessternwarte Tautenburg
Coel Hellier
Keele University
Jonathan Horner
University of Southern Queensland
Petr Kabath
Czech Academy of Sciences
Judith Korth
Lund University
P. MacQueen
The University of Texas at Austin
T. Masseron
Instituto de Astrofísica de Canarias
University of La Laguna
F. Murgas
Instituto de Astrofísica de Canarias
University of La Laguna
G. Nowak
Instituto de Astrofísica de Canarias
University of La Laguna
Nicolaus Copernicus University (SGMK)
Joseph E. Rodriguez
Michigan State University
Cristilyn N. Watkins
Harvard-Smithsonian Center for Astrophysics
R. A. Wittenmyer
University of Southern Queensland
George Zhou
University of Southern Queensland
C. Ziegler
Stephen F. Austin State University
Allyson Bieryla
Harvard-Smithsonian Center for Astrophysics
P. Boyd
National Aeronautics and Space Administration (NASA)
Catherine A. Clark
National Aeronautics and Space Administration (NASA)
California Institute of Technology (Caltech)
Courtney D. Dressing
University of California
J. D. Eastman
Harvard-Smithsonian Center for Astrophysics
Jan Eberhardt
Max Planck Society
M. Endl
The University of Texas at Austin
Néstor Espinoza
Space Telescope Science Institute (STScI)
Michael Fausnaugh
Massachusetts Institute of Technology (MIT)
Texas Tech University
N. Guerrero
Massachusetts Institute of Technology (MIT)
College of Liberal Arts and Sciences
T. Henning
Max Planck Society
K.M. Hesse
Massachusetts Institute of Technology (MIT)
Melissa J. Hobson
University of Geneva
S.B. Howell
National Aeronautics and Space Administration (NASA)
Andrés Jordán
Millennium Institute of Astrophysics
Adolfo Ibáñez University
D. W. Latham
Harvard-Smithsonian Center for Astrophysics
M. B. Lund
National Aeronautics and Space Administration (NASA)
Ismael Mireles
University of New Mexico
Norio Narita
Instituto de Astrofísica de Canarias
University of Tokyo
Astrobiology Center, Japan
M. Tala-Pinto
Millennium Institute of Astrophysics
Adolfo Ibáñez University
Teznie Pugh
The University of Texas at Austin
Samuel N. Quinn
Harvard-Smithsonian Center for Astrophysics
George R. Ricker
Massachusetts Institute of Technology (MIT)
D. R. Rodriguez
Space Telescope Science Institute (STScI)
Felipe I. Rojas
Millennium Institute of Astrophysics
Pontificia Universidad Catolica de Chile
Mark E. Rose
National Aeronautics and Space Administration (NASA)
Alexander Rudat
Massachusetts Institute of Technology (MIT)
Paula Sarkis
Max Planck Society
A. B. Savel
University of Maryland
M. Schlecker
University of Arizona
R. Schwarz
Harvard-Smithsonian Center for Astrophysics
S. Seager
Massachusetts Institute of Technology (MIT)
Avi Shporer
Massachusetts Institute of Technology (MIT)
Jeffrey C. Smith
SETI Institute
Keivan G. Stassun
Vanderbilt University
C. Stockdale
Hazelwood Observatory
T. Trifonov
Sofia University
Heidelberg-Königstuhl State Observatory
Max Planck Society
Roland K. Vanderspek
Massachusetts Institute of Technology (MIT)
J. N. Winn
Princeton University
Duncan J Wright
University of Southern Queensland
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 690 A18Exoplanets from space -CHEOPS and PLATO ESA's next two projects (Phase 2)
Swedish National Space Board (65/19), 2020-01-01 -- 2022-12-31.
Swedish National Space Board (177/19), 2020-01-01 -- 2022-12-31.
Gender Initiative for Excellence (Genie)
The Chalmers University Foundation, 2019-01-01 -- 2028-12-31.
Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
Fusion, Plasma and Space Physics
DOI
10.1051/0004-6361/202451313