Discovery of TOI-1260d and the characterization of the multiplanet system
Journal article, 2023
We report the discovery of a third planet transiting the star TOI-1260, previously known to host two transiting sub-Neptune planets with orbital periods of 3.127 and 7.493 d, respectively. The nature of the third transiting planet with a 16.6-d orbit is supported by ground-based follow-up observations, including time-series photometry, high-angular resolution images, spectroscopy, and archival imagery. Precise photometric monitoring with CHEOPS allows to improve the constraints on the parameters of the system, improving our knowledge on their composition. The improved radii of TOI-1260b and TOI-1260c are 2.36 +/- 0.06R(circle plus), 2.82 +/- 0.08R(circle plus), respectively while the newly discovered third planet has a radius of 3.09 +/- 0.09R(circle plus). The radius uncertainties are in the range of 3 per cent, allowing a precise interpretation of the interior structure of the three planets. Our planet interior composition model suggests that all three planets in the TOI-1260 system contains some fraction of gas. The innermost planet TOI-1260b has most likely lost all of its primordial hydrogen-dominated envelope. Planets c and d were also likely to have experienced significant loss of atmospheric through escape, but to a lesser extent compared to planet b.
stars: individual: TOI-1260
techniques: radial velocities
planets and satellites: individual: TOI-1260b, c, d
planets and satellites: detection
techniques: photometric
planets and satellites: composition
Author
K. W. F. Lam
German Aerospace Center (DLR)
J. Cabrera
German Aerospace Center (DLR)
M. J. Hooton
University of Bern
University of Cambridge
Y. Alibert
University of Bern
A. Bonfanti
Austrian Academy of Sciences
M. Beck
University of Geneva
A. Deline
University of Geneva
H-G Floren
Stockholm University
A. E. Simon
University of Bern
L. Fossati
Austrian Academy of Sciences
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Malcolm Fridlund
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
S. Salmon
University of Geneva
S. Hoyer
Aix Marseille University
H. P. Osborn
Massachusetts Institute of Technology (MIT)
University of Bern
T.G. Wilson
University of St Andrews
Iskra Georgieva
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Gr Nowak
Instituto de Astrofísica de Canarias
University of La Laguna
R. Luque
University of Chicago
J. A. Egger
University of Bern
V Adibekyan
University of Porto
R. Alonso
Instituto de Astrofísica de Canarias
University of La Laguna
G. A. Escude
Spanish National Research Council (CSIC)
Institute of Space Studies of Catalonia (IEEC)
T. Barczy
Admatis
D. Barrado
Spanish Astrobiology Center (INTA-CSIC)
S. C. C. Barros
University of Porto
W. Baumjohann
Austrian Academy of Sciences
T. Beck
University of Bern
A. Bekkelien
University of Geneva
W. Benz
University of Bern
N. Billot
University of Geneva
X. Bonfils
Grenoble Alpes University
A. Brandeker
Stockholm University
C. Broeg
University of Bern
S. Charnoz
Paris Descartes University
A. Collier Cameron
University of St Andrews
Sz Csizmadia
German Aerospace Center (DLR)
M. B. Davies
Lund University
M. Deleuil
Aix Marseille University
L. Delrez
University of Liège
O. D. S. Demangeon
University of Porto
B-O Demory
University of Bern
D. Ehrenreich
University of Geneva
A. Erikson
German Aerospace Center (DLR)
A. Fortier
University of Bern
D. Futyan
University of Geneva
D. Gandolfi
University of Turin
M. Gillon
University of Liège
M. Guedel
University of Vienna
P. Guterman
Aix Marseille University
Institut National des Sciences de l'Univers
J. Laskar
Sorbonne University
D. W. Latham
Harvard-Smithsonian Center for Astrophysics
A. Lecavelier des Etangs
Pierre and Marie Curie University (UPMC)
M. Lendl
University of Geneva
C. Lovis
Austrian Academy of Sciences
K. Heng
The University of Warwick
University of Bern
K. G. Isaak
European Space Research and Technology Centre (ESA ESTEC)
L. Kiss
The University of Sydney
Eötvös Loránd University (ELTE)
Hungarian Academy of Sciences
D. Magrin
Istituto nazionale di astrofisica (INAF)
P. F. L. Maxted
Keele University
V Nascimbeni
Istituto nazionale di astrofisica (INAF)
G. Olofsson
Stockholm University
R. Ottensamer
University of Vienna
I Pagano
Istituto nazionale di astrofisica (INAF)
E. Palle
University of La Laguna
Instituto de Astrofísica de Canarias
G. Peter
German Aerospace Center (DLR)
G. Piotto
Istituto nazionale di astrofisica (INAF)
D. Pollacco
The University of Warwick
D. Queloz
Swiss Federal Institute of Technology in Zürich (ETH)
University of Cambridge
I Ribas
Institute of Space Studies of Catalonia (IEEC)
Spanish National Research Council (CSIC)
R. Ragazzoni
Istituto nazionale di astrofisica (INAF)
University of Padua
N. Rando
European Space Agency (ESA)
H. Rauer
German Aerospace Center (DLR)
Technische Universität Berlin
Freie Universität Berlin
N. C. Santos
University of Porto
G. Scandariato
Istituto nazionale di astrofisica (INAF)
S. Seager
Massachusetts Institute of Technology (MIT)
D. Segransan
University of Geneva
L. M. Serrano
University of Turin
A. M. S. Smith
German Aerospace Center (DLR)
S. G. Sousa
University of Porto
M. Steller
Austrian Academy of Sciences
Gy M. Szabo
Eötvös Loránd University (ELTE)
N. Thomas
University of Bern
S. Udry
University of Geneva
V. Van Grootel
University of Liège
N. A. Walton
University of Cambridge
J. N. Winn
Princeton University
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 519 1 1437-1451Subject Categories
Astronomy, Astrophysics and Cosmology
Other Physics Topics
DOI
10.1093/mnras/stac3639