TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf
Artikel i vetenskaplig tidskrift, 2023
We present the discovery of two exoplanets transiting TOI-836 (TIC 440887364) using data from TESS Sector 11 and Sector 38. TOI-836 is a bright (T = 8.5 mag), high proper motion (∼200 mas yr−1), low metallicity ([Fe/H]≈−0.28) K-dwarf with a mass of 0.68 ± 0.05 M and a radius of 0.67 ± 0.01 R. We obtain photometric follow-up observations with a variety of facilities, and we use these data sets to determine that the inner planet, TOI-836 b, is a 1.70 ± 0.07 R super-Earth in a 3.82-d orbit, placing it directly within the so-called ‘radius valley’. The outer planet, TOI-836 c, is a 2.59 ± 0.09 R mini-Neptune in an 8.60-d orbit. Radial velocity measurements reveal that TOI-836 b has a mass of 4.5 ± 0.9 M, while TOI-836 c has a mass of 9.6 ± 2.6 M. Photometric observations show Transit Timing Variations (TTVs) on the order of 20 min for TOI-836 c, although there are no detectable TTVs for TOI-836 b. The TTVs of planet TOI-836 c may be caused by an undetected exterior planet.
planets and satellites: detection
techniques: radial velocities
stars: individual: TOI-836 (TIC 440887364, GAIA EDR3 6230733559097425152)
techniques: photometric
Författare
F. Hawthorn
The University of Warwick
D. Bayliss
The University of Warwick
T.G. Wilson
University of St Andrews
A. Bonfanti
Institut fur Weltraumforschung
V. Adibekyan
Universidade do Porto
Y. Alibert
Universität Bern
S. G. Sousa
Universidade do Porto
K. A. Collins
Harvard-Smithsonian Center for Astrophysics
E. Bryant
The University of Warwick
A. Osborn
The University of Warwick
D. J. Armstrong
The University of Warwick
L. Abe
Observatoire de la Cote d'Azur
J.S. Acton
University Of Leicester
Brett C Addison
University of Southern Queensland
Karim Agabi
Observatoire de la Cote d'Azur
R. Alonso
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Douglas R. Alves
Universidad de Chile (UCH)
G. Anglada Escude´
Institut d'Estudis Espacials de Catalunya (IEEC)
Institut de Ciències de l'Espai (ICE) - CSIC
T. Bárczy
Admatis
Thomas Barclay
NASA Goddard Space Flight Center
University of Maryland
D. Barrado
Centro de Astrobiologia (CAB)
S.C.C. Barros
Universidade do Porto
W. Baumjohann
Institut fur Weltraumforschung
Philippe Bendjoya
Observatoire de la Cote d'Azur
W. Benz
Universität Bern
Allyson Bieryla
Harvard-Smithsonian Center for Astrophysics
X. Bonfils
Institut de Planétologie et d’Astrophysique de Grenoble (IPAG)
François Bouchy
Université de Genève
A. Brandeker
Stockholms universitet
C. Broeg
Universität Bern
David J.A. Brown
The University of Warwick
Matt Burleigh
University Of Leicester
M. Buttu
Programma Nazionale di Ricerche in Antartide (PNRA)
Juan Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
D. A. Caldwell
NASA Ames Research Center
Sarah Casewell
University Of Leicester
D. Charbonneau
Harvard-Smithsonian Center for Astrophysics
S. Charnoz
Institut de Physique du Globe de Paris
R. Cloutier
Harvard-Smithsonian Center for Astrophysics
A. Collier Cameron
University of St Andrews
K. I. Collins
George Mason University
D. Conti
American Association of Variable Star Observers
N. Crouzet
European Space Research and Technology Centre (ESA ESTEC)
Szilárd Czismadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
M. B. Davies
Lunds universitet
M. Deleuil
Laboratoire d'Astrophysique de Marseille
E. Delgado Mena
Universidade do Porto
L. Delrez
Universite de Liège
O. Demangeon
Universidade do Porto
B.O. Demory
Universität Bern
Georgina Dransfield
University of Birmingham
X. Dumusque
Université de Genève
J. A. Egger
Universität Bern
D. Ehrenreich
Université de Genève
P. Eigmüller
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Anders Erickson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Zahra Essack
Massachusetts Institute of Technology (MIT)
A. Fortier
Universität Bern
L. Fossati
Institut fur Weltraumforschung
Malcolm Fridlund
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Universiteit Leiden
Maximilian N. Günther
European Space Research and Technology Centre (ESA ESTEC)
M. Gudel
Universität Wien
D. Gandolfi
Universita degli Studi di Torino
Harvey Gillard
The University of Warwick
Michaël Gillon
Universite de Liège
Crystal Gnilka
NASA Ames Research Center
National Aeronautics and Space Administration (NASA)
M.R. Goad
University Of Leicester
Robert Goeke
Massachusetts Institute of Technology (MIT)
T. Guillot
Observatoire de la Cote d'Azur
A. Hadjigeorghiou
The University of Warwick
Coel Hellier
Keele University
B. Henderson
University Of Leicester
Kevin Heng
The University of Warwick
Universität Bern
M.J. Hooton
University of Cambridge
Universität Bern
Keith Horne
University of St Andrews
S. B. Howell
NASA Ames Research Center
S. Hoyer
Laboratoire d'Astrophysique de Marseille
J. M. Irwin
Harvard-Smithsonian Center for Astrophysics
James S. Jenkins
Universidad Diego Portales
Centro de Astrofísica y Tecnologías Afines (CATA),
Jon M. Jenkins
NASA Ames Research Center
Eric L.N. Jensen
Swarthmore College
S. R. Kane
University of California
Alicia Kendall
University Of Leicester
J. F. Kielkopf
University of Louisville
L.L. Kiss
Magyar Tudomanyos Akademia
Eötvös Loránd University (ELTE)
G. Lacedelli
Istituto nazionale di astrofisica (INAF)
J. Laskar
Observatoire de Paris
D. W. Latham
Harvard-Smithsonian Center for Astrophysics
A. L. des Etangs
Institut d 'Astrophysique de Paris
A. Leleu
Université de Genève
Universität Bern
M. Lendl
Université de Genève
J. Lillo-Box
Centro de Astrobiologia (CAB)
C. Lovis
Université de Genève
Djamel Mékarnia
Observatoire de la Cote d'Azur
Bob Massey
Villa’39 Observatory
Tamzin Masters
The University of Warwick
P. Maxted
Keele University
Valerio Nascimbeni
Istituto nazionale di astrofisica (INAF)
L. D. Nielsen
European Southern Observatory (ESO)
Sean M. O’Brien
Queen's University Belfast
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 520 3 3649-3668Ämneskategorier
Astronomi, astrofysik och kosmologi
DOI
10.1093/mnras/stad306