E-viri
Recenzirano
Odprti dostop
-
Hawthorn, Faith; Bayliss, Daniel; Bonfanti, Andrea; Alibert, Yann; Bryant, Edward M; Armstrong, David J; Addison, Brett C; Alonso, Roi; Alves, Douglas R; Anglada-Escudé, Guillem; Bárczy, Tamas; Barclay, Thomas; Barros, Susana C C; Bendjoya, Philippe; Benz, Willy; Bieryla, Allyson; Bonfils, Xavier; Bouchy, François; Burleigh, Matthew R; Caldwell, Douglas A; Charnoz, Sébastian; Cameron, Andrew Collier; Collins, Kevin I; Crouzet, Nicolas; Davies, Melvyn B; Deleuil, Magali; Delrez, Laetitia; Demangeon, Olivier D S; Demory, Brice-Olivier; Ehrenreich, David; Fortier, Andrea; Fossati, Luca; Günther, Maximilian N; Güdel, Manuel; Gandolfi, Davide; Gillard, Harvey; Gillon, Michaël; Gnilka, Crystal; Goad, Michael R; Goeke, Robert F; Guillot, Tristan; Hadjigeorghiou, Andreas; Hellier, Coel; Henderson, Beth A; Heng, Kevin; Hooton, Matthew J; Howell, Steve B; Hoyer, Sergio; Irwin, Jonathan M; Jenkins, James S; Jenkins, Jon M; Jensen, Eric L N; Kane, Stephen R; Kiss, Laszlo L; Lacedelli, Gaia; Laskar, Jacques; Latham, David W; Etangs, Alain Lecavalier des; Leleu, Adrien; Lendl, Monika; Lillo-Box, Jorge; Lovis, Christophe; Mékarnia, Djamel; Massey, Bob; Masters, Tamzin; Maxted, Pierre F L; Nascimbeni, Valerio; Nielsen, Louise D; O’Brien, Sean M; Olofsson, Göran; Osborn, Hugh P; Pagano, Isabella; Pallé, Enric; Persson, Carina M; Plavchan, Peter; Pollacco, Don; Rauer, Heike; Ribas, Ignasi; Ségransan, Damien; Salmon, Sébastien; Santerne, Alexandre; Santos, Nuno C; Scandariato, Gaetano; Seager, Sara; Shporer, Avi; Smith, Alexis M S; Srdoc, Gregor; Steller, Manfred; Suarez, Olga; Szabó, Gyula M; Teske, Johanna; Thomas, Nicolas; Triaud, Amaury H M J; Udry, Stéphane; Van Grootel, Valérie; Walton, Nicholas; Wheatley, Peter J; Winn, Joshua N; Wittenmyer, Robert A; Zhang, Hui
Monthly notices of the Royal Astronomical Society, 2023, Letnik: 520, Številka: 3Journal Article, Web Resource
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.
