TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf
Date Issued
2023
Author(s)
Hawthorn, Faith
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Bayliss, Daniel
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Wilson, Thomas G.
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Bonfanti, Andrea
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Adibekyan, Vardan
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Alibert, Yann
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Sousa, Sérgio G.
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Collins, Karen A.
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Bryant, Edward M.
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Osborn, Ares
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Armstrong, David J.
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Abe, Lyu
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Acton, Jack S.
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Addison, Brett C.
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Agabi, Karim
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Alonso, Roi
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Alves, Douglas R.
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Anglada-Escudé, Guillem
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Bárczy, Tamas
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Barclay, Thomas
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Barrado, David
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Barros, Susana C. C.
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Baumjohann, Wolfgang
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Bendjoya, Philippe
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Benz, Willy
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Bieryla, Allyson
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Bonfils, Xavier
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Bouchy, François
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Brandeker, Alexis
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Broeg, Christopher
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Brown, David J. A.
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Burleigh, Matthew R.
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Cabrera, Juan
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Caldwell, Douglas A.
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Casewell, Sarah L.
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Charbonneau, David
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Charnoz, Sébastian
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Cloutier, Ryan
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Cameron, Andrew Collier
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Collins, Kevin I.
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Conti, Dennis M.
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Crouzet, Nicolas
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Czismadia, Szilárd
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Davies, Melvyn B.
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Deleuil, Magali
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Delgado-Mena, Elisa
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Delrez, Laetitia
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Demangeon, Olivier D. S.
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Demory, Brice-Olivier
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Dransfield, Georgina
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Dumusque, Xavier
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Egger, Jo Ann
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Ehrenreich, David
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Eigmüller, Philipp
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Erickson, Anders
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Essack, Zahra
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Fortier, Andrea
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Fossati, Luca
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Fridlund, Malcolm
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Günther, Maximilian N.
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Güdel, Manuel
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Gandolfi, Davide
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Gillard, Harvey
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Gillon, Michaël
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Gnilka, Crystal
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Goad, Michael R.
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Goeke, Robert F.
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Guillot, Tristan
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Hadjigeorghiou, Andreas
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Hellier, Coel
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Henderson, Beth A.
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Heng, Kevin
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Hooton, Matthew J.
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Horne, Keith
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Howell, Steve B.
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Hoyer, Sergio
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Irwin, Jonathan M.
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Jenkins, James S.
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Jenkins, Jon M.
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Jensen, Eric L. N.
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Kane, Stephen R.
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Kendall, Alicia
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Kielkopf, John F.
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Kiss, Laszlo L.
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Laskar, Jacques
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Latham, David W.
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Etangs, Alain Lecavalier des
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Leleu, Adrien
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Lendl, Monika
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Lillo-Box, Jorge
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Lovis, Christophe
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Mékarnia, Djamel
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Massey, Bob
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Masters, Tamzin
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Maxted, Pierre F. L.
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Nielsen, Louise D.
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O'Brien, Sean M.
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Olofsson, Göran
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Osborn, Hugh P.
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Pallé, Enric
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Persson, Carina M.
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Plavchan, Peter
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Pollacco, Don
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Queloz, Didier
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Rauer, Heike
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Ribas, Ignasi
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Ricker, George
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Ségransan, Damien
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Salmon, Sébastien
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Santerne, Alexandre
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Santos, Nuno C.
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Schmider, François-Xavier
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Schwarz, Richard P.
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Seager, Sara
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Shporer, Avi
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Simon, Attila E.
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Smith, Alexis M. S.
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Srdoc, Gregor
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Steller, Manfred
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Suarez, Olga
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Szabó, Gyula M.
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Teske, Johanna
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Thomas, Nicolas
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Tilbrook, Rosanna H.
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Triaud, Amaury H. M. J.
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Udry, Stéphane
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Van Grootel, Valérie
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Walton, Nicholas
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Wang, Sharon X.
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Wheatley, Peter J.
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Winn, Joshua N.
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Wittenmyer, Robert A.
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Zhang, Hui
Abstract
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....
Volume
520
Issue
3
Start page
3649
Issn Identifier
0035-8711
Ads BibCode
2023MNRAS.520.3649H
Rights
open.access
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