Architecture of TOI-561 planetary system
Artikel i vetenskaplig tidskrift, 2024
We present new observations from CHEOPS (CHaracterising ExOPlanet Satellite) and TESS (Transiting Exoplanet Survey Satellite) to clarify the architecture of the planetary system hosted by the old Galactic thick disc star TOI-561. Our global analysis, which also includes previously published photometric and radial velocity data, incontrovertibly proves that TOI-561 is hosting at least four transiting planets with periods of 0.44 d (TOI-561 b), 10.8 d (TOI-561 c), 25.7 d (TOI-561 d), and 77.1 d (TOI-561 e) and a fifth non-transiting candidate, TOI-561f with a period of 433 d. The precise characterization of TOI-561's orbital architecture is interesting since old and metal-poor thick disc stars are less likely to host ultrashort-period super-Earths like TOI-561 b. The new period of planet -e is consistent with the value obtained using radial velocity alone and is now known to be 77.14399 ± 0.00025 d, thanks to the new CHEOPS and TESS transits. The new data allowed us to improve its radius (Rp = 2.517 ± 0.045 R⊕ from 5 per cent to 2 per cent precision) and mass(Mp = 12.4 ± 1.4 M?) estimates, implying a density of ρp = 0.778 ± 0.097 ρ⊕. Thanks to recent TESS observations and the focused CHEOPS visit of the transit of TOI-561 e, a good candidate for exomoon searches, the planet's period is finally constrained, allowing us to predict transit times through 2030 with 20-min accuracy. We present an updated version of the internal structure of the four transiting planets. We finally performed a detailed stability analysis, which confirmed the long-term stability of the outer planet TOI-561 f.
planets and satellites: fundamental parameters
techniques: radial velocities
ephemerides
planets and satellites: dynamical evolution and stability
planets and satellites: interiors
techniques: photometric
Författare
Giampaolo P. Piotto
Istituto nazionale di astrofisica (INAF)
Università di Padova
Tiziano Zingales
Istituto nazionale di astrofisica (INAF)
Università di Padova
L. Borsato
Istituto nazionale di astrofisica (INAF)
J. A. Egger
Universität Bern
A. Correia
Universidade de Coimbra
A.E. Simon
Universität Bern
H.-G. Florén
Stockholms universitet
S.G. Sousa
Universidade do Porto
P. Maxted
Keele University
D. Nardiello
Università di Padova
Istituto nazionale di astrofisica (INAF)
L. Malavolta
Istituto nazionale di astrofisica (INAF)
Università di Padova
T.G. Wilson
The University of Warwick
Y. Alibert
Universität Bern
V. Adibekyan
Universidade do Porto
A. Bonfanti
Institut fur Weltraumforschung
R. Luque
University of Chicago
N. C. Santos
Universidade do Porto
M.J. Hooton
University of Cambridge
L. Fossati
Institut fur Weltraumforschung
A. M.S. Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. Salmon
Université de Genève
G. Lacedelli
Instituto de Astrofísica de Canarias
R. Alonso
Universidad de la Laguna
Instituto de Astrofísica de Canarias
T. Bárczy
Admatis
D. Barrado Navascues
Europeiska rymdorganisationen (ESA)
S.C.C. Barros
Universidade do Porto
W. Baumjohann
Institut fur Weltraumforschung
T. Beck
Universität Bern
W. Benz
Universität Bern
N. Billot
Université de Genève
A. Brandeker
Stockholms universitet
C. Broeg
Universität Bern
M. Buder
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
A. Collier Cameron
University of St Andrews
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
P. E. Cubillos
Istituto nazionale di astrofisica (INAF)
Institut fur Weltraumforschung
Melvyn B. Davies
Lunds universitet
M. Deleuil
Laboratoire d'Astrophysique de Marseille
A. Deline
Université de Genève
O. Demangeon
Universidade do Porto
B.O. Demory
Universität Bern
A. Derekas
Eötvös Loránd University (ELTE)
Billy Edwards
Netherlands Institute for Space Research (SRON)
D. Ehrenreich
Université de Genève
Anders Erikson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
A. Fortier
Universität Bern
Malcolm Fridlund
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Universiteit Leiden
D. Gandolfi
Universita degli Studi di Torino
K. Gazeas
University of Athens
Michaël Gillon
Universite de Liège
M. Gudel
Universität Wien
Maximilian N. Günther
Europeiska rymdorganisationen (ESA)
A. Heitzmann
Université de Genève
Ch. Helling
Institut fur Weltraumforschung
Technische Universität Graz
K. Isaak
Europeiska rymdorganisationen (ESA)
L. L. Kiss
Magyar Tudomanyos Akademia
Eötvös Loránd University (ELTE)
Judith Korth
Lunds universitet
K. W.F. Lam
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
J. Laskar
Observatoire de Paris
A. L. des Etangs
Institut d 'Astrophysique de Paris
M. Lendl
Université de Genève
P. Leonardi
Università di Padova
Universita degli Studi di Trento
D. Magrin
Istituto nazionale di astrofisica (INAF)
G. Mantovan
Istituto nazionale di astrofisica (INAF)
Università di Padova
C. Mordasini
Universität Bern
Valerio Nascimbeni
Istituto nazionale di astrofisica (INAF)
G. Olofsson
Stockholms universitet
R. Ottensamer
Universität Wien
I. Pagano
Istituto nazionale di astrofisica (INAF)
Enric Palle
Instituto de Astrofísica de Canarias
Universidad de la Laguna
G. Peter
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
R. Ottensamer
Princeton University
Don L. Pollacco
The University of Warwick
D. Queloz
Eidgenössische Technische Hochschule Zürich (ETH)
University of Cambridge
Roberto Ragazzoni
Università di Padova
Istituto nazionale di astrofisica (INAF)
N. Rando
Europeiska rymdorganisationen (ESA)
F. Ratti
Europeiska rymdorganisationen (ESA)
H. Rauer
Freie Universität Berlin
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
I. Ribas
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
Consejo Superior de Investigaciones Científicas (CSIC)
Gaetano Scandariato
Istituto nazionale di astrofisica (INAF)
D. Segransan
Université de Genève
D. Sicilia
Istituto nazionale di astrofisica (INAF)
M. Stalport
Universite de Liège
S. Sulis
Laboratoire d'Astrophysique de Marseille
G.M. Szabó
Eötvös Loránd University (ELTE)
HUN-REN-ELTE Exoplanet Research Group
S. Udry
Université de Genève
S. Ulmer-Moll
Institut fur Weltraumforschung
Universite de Liège
Universität Bern
V. Van Grootel
Universite de Liège
J. Venturini
Université de Genève
E. Villaver
Instituto de Astrofísica de Canarias
Universidad de la Laguna
N. A. Walton
University of Cambridge
J. N. Winn
Princeton University
S. Wolf
Université de Genève
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 535 3 2763-2774Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
DOI
10.1093/mnras/stae2440