The Discovery of Five Hot Jupiters by TESS
Journal article, 2026
Despite decades of research on hot Jupiters, there are still several theories for their formation. Perhaps hot Jupiters form in several ways. Atmospheric and dynamical studies have the capability to constrain the formation scenarios. However, potential targets have to be well characterized before these observations can further constrain the theories. We present the confirmation and characterization of five hot and warm Jupiters discovered by the TESS space mission. Using TESS data combined with ground-based observations, we determine the masses, radii, and other parameters of TOI-2040 b, TOI-2049 b, TOI-2578 b, TOI-4427 b, and TOI-4458 b. Three of the planets have equilibrium temperatures of about 1800 K while two have temperatures of about 1000 K. Particularly interesting for future atmospheric characterizations are TOI-2578 b and TOI-4427 b, because of their low density and large transmission spectroscopy metric. TOI-4458 b is of special interest because it is in the northern PLATO field. It appears that TOI-2040 b has a small, but measurable eccentricity.
Exoplanet atmospheres (487)
Author
E. W. Guenther
Thüringer Landessternwarte Tautenburg
William D. Cochran
University of Texas
P. MacQueen
University of Texas
E. Goffo
University of Turin
Hanna Kellermann
Ludwig Maximilian University of Munich (LMU)
Benard Nsamba
Max Planck Society
Kyambogo University
M. Endl
University of Texas
D. Sebastian
Thüringer Landessternwarte Tautenburg
University of Birmingham
D. Gandolfi
University of Turin
Cyrille Aumasson
Observatoire des Baronnies Provençales
O. Barragán
University of Oxford
Slawomir Bednarz
Silesian University of Technology
Krzysztof Bernacki
Silesian University of Technology
Allyson Bieryla
Harvard-Smithsonian Center for Astrophysics
P. Bosch-Cabot
University of Lethbridge
Ilaria Carleo
Instituto de Astrofísica de Canarias
Wesleyan University
D. R. Ciardi
California Institute of Technology (Caltech)
Clark Catherine A. Clark
California Institute of Technology (Caltech)
Szilard Csizmadia
German Aerospace Center (DLR)
H. Deeg
Instituto de Astrofísica de Canarias
Parker Duke
University of Texas
Gareb Enoc Fernández Rodríguez
Instituto de Astrofísica de Canarias
Juliana Ehrhardt
Ludwig Maximilian University of Munich (LMU)
M.E. Everett
NSF's National Optical-Infrared Astronomy Research Laboratory (NOIRLab)
Malcolm Fridlund
Leiden University
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
A. Fukui
Instituto de Astrofísica de Canarias
University of Tokyo
Iskra Georgieva
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Frank Grupp
Ludwig Maximilian University of Munich (LMU)
T. Hirano
National Institutes of Natural Sciences
The Graduate University for Advanced Studies (SOKENDAI)
National Astronomical Observatory of Japan
Petr Kabath
Czech Academy of Sciences
Juma Kamulali
Kyambogo University
University of Porto
Max Planck Society
Yugo Kawai
University of Tokyo
J. F. Kielkopf
University of Louisville
Judith Korth
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Lund University
Lacedelli Gaia
University of La Laguna
Instituto de Astrofísica de Canarias
K. W.F. Lam
Technische Universität Berlin
D. W. Latham
Harvard-Smithsonian Center for Astrophysics
J.H. Livingston
The Graduate University for Advanced Studies (SOKENDAI)
National Institutes of Natural Sciences
M. B. Lund
California Institute of Technology (Caltech)
Priscilla Muheki
Mbarara University of Science & Technology
F. Murgas
University of La Laguna
Instituto de Astrofísica de Canarias
Norio Narita
University of La Laguna
Instituto de Astrofísica de Canarias
University of Tokyo
National Institutes of Natural Sciences
Greg Olmschenk
National Aeronautics and Space Administration (NASA)
Enric Palle
Instituto de Astrofísica de Canarias
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Adam Popowicz
Silesian University of Technology
Teznie Pugh
University of Texas
Manfred Rätz
Volkssternwarte Kirchheim
S. Redfield
Wesleyan University
Arno Riffeser
Ludwig Maximilian University of Munich (LMU)
Marek Skarka
Czech Academy of Sciences
L. M. Serrano
University of Turin
A. M.S. Smith
German Aerospace Center (DLR)
G. Srdoc
Kotizarovci Observatory
Vincent Van Eylen
University College London (UCL)
Julian Van Eyken
California Institute of Technology (Caltech)
Anäel Wünsche
Observatoire des Baronnies Provençales
Astronomical Journal
0004-6256 (ISSN) 1538-3881 (eISSN)
Vol. 172 1 54Subject Categories (SSIF 2025)
Astronomy, Astrophysics, and Cosmology
DOI
10.3847/1538-3881/ae6449