F. Hawthorn
D. Bayliss
T. G. Wilson
A. Bonfanti
V. Adibekyan
Y. Alibert
S. G. Sousa
K. A. Collins
E. M. Bryant
A. Osborn
D. J. Armstrong
L. Abe
J. S. Acton
B. C. Addison
K. Agabi
R. Alonso
D. R. Alves
G. Anglada-Escudé
T. Bárczy
T. Barclay
D. Barrado
S. C. C. Barros
W. Baumjohann
P. Bendjoya
W. Benz
A. Bieryla
X. Bonfils
F. Bouchy
A. Brandeker
C. Broeg
D. J. A. Brown
M. R. Burleigh
M. Buttu
J. Cabrera
D. A. Caldwell
S. L. Casewell
D. Charbonneau
S. Charnoz
R. Cloutier
A. Collier Cameron
K. I. Collins
D. M. Conti
N. Crouzet
S. Czismadia
M. B. Davies
M. Deleuil
E. Delgado-Mena
L. Delrez
O. D. S. Demangeon
B.-O. Demoray
G. Dransfield
X. Dumusque
J. A. Egger
D. Ehrenreich
P. Eigmüller
A. Erickson
Z. Essack
A. Fortier
L. Fossati
M. Fridlund
M. N. Günther
M. Güdel
D. Gandolfi
H. Gillard
M. Gillon
C. Gnilka
M. R. Goad
R. F. Goeke
T. Guillot
A. Hadjigeorghiou
C. Hellier
B. A. Henderson
K. Heng
M. J. Hooton
K. Horne
S. B. Howell
S. Hoyer
J. M. Irwin
J. S. Jenkins
J. M. Jenkins
Eric L.N. Jensen, Swarthmore CollegeFollow
S. R. Kane
A. Kendall
J. F. Kielkopf
L. L. Kiss
G. Lacedelli
J. Laskar
D. W. Latham
A. Lecavalier des Etangs
A. Leleu
M. Lendl
J. Lillo-Box
C. Lovis
D. Mékarnia
B. Massey
T. Masters
P. F. L. Maxted
V. Nascimbeni
L. D. Nielsen
S. M. O'Brien
G. Olofsson
H. P. Osborn
I. Pagano
E. Pallé
C. M. Persson
G. Piotto
P. Plavchan
D. Pollacco
D. Queloz
R. Ragazzoni
H. Rauer
I. Ribas
G. Ricker
D. Ségransan
S. Salmon
A. Santerne
N. C. Santos
G. Scandariato
F.-X. Schmider
R. P. Schwarz
S. Seager
A. Shporer
A. E. Simon
A. M. S. Smith
G. Srdoc
M. Steller
O. Suarez
G. M. Szabó
J. Teske
N. Thomas
R. H. Tilbrook
A. H. M. J. Triaud
S. Udry
V. Van Grootel
N. Walton
S. X. Wang
P. J. Wheatley
J. N. Winn
R. A. Wittenmyer
H. Zhang

Document Type


Publication Date


Published In

Monthly Notices Of The Royal Astronomical Society


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.


This article has been published in Monthly Notices Of The Royal Astronomical Society. © 2023 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.