TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey Satellite

Brahm, Rafael and Nielsen, Louise D. and Wittenmyer, Robert A. and Wang, Songhu and Rodriguez, Joseph E. and Espinoza, Nestor and Jones, Matias I. and Jordan, Andres and Henning, Thomas and Hobson, Melissa and Kossakowski, Diana and Rojas, Felipe and Sarkis, Paula and Schlecker, Martin and Trifonov, Trifon and Shahaf, Sahar and Ricker, George and Vanderspek, Roland and Latham, David W. and Seager, Sara and Winn, Joshua N. and Jenkins, Jon M. and Addison, Brett C. ORCID: https://orcid.org/0000-0003-3216-0626 and Bakos, Gaspar A. and Bhatti, Waqas and Bayliss, Daniel and Berlind, Perry and Bieryla, Allyson and Bouchy, Francois and Bowler, Brendan P. and Briceno, Cesar and Brown, Timothy M. and Bryant, Edward M. and Caldwell, Douglas A. and Charbonneau, David and Collins, Karen A. and Davis, Allen B. and Esquerdo, Gilbert A. and Fulton, Benjamin J. and Guerrero, Natalia M. and Henze, Christopher E. and Hogan, Aleisha and Horner, Jonathan and Huang, Chelsea X. and Irwin, Jonathan and Kane, Stephen R. and Kielkopf, John and Mann, Andrew W. and Mazeh, Tsevi and McCormac, James and McCully, Curtis and Mengel, Matthew W. and Mireles, Ismael and Okumura, Jack and Plavchan, Peter and Quinn, Samuel N. and Rabus, Markus and Saesen, Sophie and Schlieder, Joshua E. and Segransan, Damien and Shiao, Bernie and Shporer, Avi and Siverd, Robert J. and Stassun, Keivan G. and Suc, Vincent and Tan, Thiam-Guan and Torres, Pascal and Tinney, Chris G. and Udry, Stephane and Vanzi, Leonardo and Vezie, Michael and Vines, Jose I. and Vuckovic, Maja and Wright, Duncan J. and Yahalomi, Daniel A. and Zapata, Abner and Zhang, Hui and Ziegler, Carl (2020) TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey Satellite. The Astronomical Journal, 160 (5):235. pp. 1-14. ISSN 0004-6256


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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 02 Feb 2021 01:40
Last Modified: 17 Aug 2021 00:09
Uncontrolled Keywords: Exoplanet detection methods; Transit photometry; Radial velocity; Exoplanet astronomy; 489; 1709; 1332; 486; Astrophysics - Earth and; Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.3847/1538-3881/abba3b
URI: http://eprints.usq.edu.au/id/eprint/40623

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