TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey Satellite
Rafael Brahm, Louise D. Nielsen, Robert A. Wittenmyer, Songhu Wang, Joseph E. Rodriguez, Néstor Espinoza, M. I. Jones, Andrés Jordán, Thomas Henning, Mélissa J. Hobson, D. Kossakowski, Felipe Rojas, P. Sarkis, Martin Schlecker, Trifon Trifonov, S. Shahaf, G. Ricker, R. Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Brett Addison, G. Á. Bakos, W. Bhatti, Daniel Bayliss, P. Berlind, Allyson Bieryla, F. Bouchy, Brendan P. Bowler, César Briceño, Timothy M. Brown, Edward M. Bryant, Douglas A. Caldwell, David Charbonneau, Karen A. Collins, Allen B. Davis, Gilbert A. Esquerdo, Benjamin J. Fulton, Natalia Guerrero, Christopher E. Henze, Aleisha Hogan, Jonathan Horner, Chelsea X. Huang, Jonathan Irwin, Stephen R. Kane, John F. Kielkopf, Andrew W. Mann, T. Mazeh, J. McCormac, C. McCully, Matthew W. Mengel, Ismael Mireles, Jack Okumura, Peter Plavchan, Samuel N. Quinn, M. Rabus, S. Saesen, Joshua E. Schlieder, D. Ségransan, Bernie Shiao, Avi Shporer, Robert J. Siverd, Keivan G. Stassun, V. Suc, Tan, Thiam-Guan, P. Torres, C. G. Tinney, S. Udry, L. Vanzi, Michael Vezie, José I Vines, M. Vučković, D. J. Wright, Daniel A. Yahalomi, A. Zapata, Hui Zhang, Carl Ziegler
Abstract
We present the discovery of two new 10 day period giant planets from the Transiting Exoplanet Survey Satellite mission, whose masses were precisely determined using a wide diversity of ground-based facilities. TOI-481 b and TOI-892 b have similar radii (0.99 ± 0.01 ${R}_{{\\rm{J}}}$ and 1.07 ± 0.02 ${R}_{{\\rm{J}}}$, respectively), and orbital periods (10.3311 days and 10.6266 days, respectively), but significantly different masses (1.53 ± 0.03 ${M}_{{\\rm{J}}}$ versus 0.95 ± 0.07 ${M}_{{\\rm{J}}}$, respectively). Both planets orbit metal-rich stars ($[\\mathrm{Fe}/{\\rm{H}}]$ = $+0.26\\pm 0.05$ dex and $[\\mathrm{Fe}/{\\rm{H}}]$ = $+0.24\\pm 0.05$ for TOI-481 and TOI-892, respectively) but at different evolutionary stages. TOI-481 is a ${M}_{\\star }$ = 1.14 ± 0.02 ${M}_{\\odot }$, ${R}_{\\star }$ = 1.66 ± 0.02 ${R}_{\\odot }$ G-type star (${T}_{\\mathrm{eff}}$ = $5735\\pm 72$ K), that with an age of 6.7 Gyr, is in the turn-off point of the main sequence. TOI-892 on the other hand, is a F-type dwarf star (${T}_{\\mathrm{eff}}$ = $6261\\pm 80$ K), which has a mass of ${M}_{\\star }$ = 1.28 ± 0.03 ${M}_{\\odot }$ and a radius of ${R}_{\\star }$ = 1.39 ± 0.02 ${R}_{\\odot }$. TOI-481 b and TOI-892 b join the scarcely populated region of transiting gas giants with orbital periods longer than 10 days, which is important to constrain theories of the formation and structure of hot Jupiters.