TOI-954 b and K2-329 b: short-period Saturn-mass planets that test whether irradiation leads to inflation
Article
Article Title | TOI-954 b and K2-329 b: short-period Saturn-mass planets that test whether irradiation leads to inflation |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Sha, Lizhou (Author), Huang, Chelsea X. (Author), Shporer, Avi (Author), Rodriguez, Joseph E. (Author), Vanderburg, Andrew (Author), Brahm, Rafael (Author), Hagelberg, Janis (Author), Matthews, Elisabeth C. (Author), Ziegler, Carl (Author), Livingston, John H. (Author), Stassun, Keivan G. (Author), Wright, Duncan J. (Author), Crane, Jeffrey D. (Author), Espinoza, Nestor (Author), Bouchy, Francois (Author), Bakos, Gaspar A. (Author), Collins, Karen A. (Author), Zhou, George (Author), Bieryla, Allyson (Author), Hartman, Joel D. (Author), Wittenmyer, Robert A. (Author), Nielsen, Louise D. (Author), Plavchan, Peter (Author), Bayliss, Daniel (Author), Sarkis, Paula (Author), Tan, Thiam-Guan (Author), Cloutier, Ryan (Author), Mancini, Luigi (Author), Jordan, Andres (Author), Wang, Sharon (Author), Henning, Thomas (Author), Narita, Norio (Author), Penev, Kaloyan (Author), Teske, Johanna K. (Author), Kane, Stephen R. (Author), Mann, Andrew W. (Author), Addison, Brett C. (Author), Tamura, Motohide (Author), Horner, Jonathan (Author), Barbieri, Mauro (Author), Burt, Jennifer A. (Author), Diaz, Matias R. (Author), Crossfield, Ian J. M. (Author), Dragomir, Diana (Author), Drass, Holger (Author), Feinstein, Adina D. (Author), Zhang, Hui (Author), Hart, Rhodes (Author), Kielkopf, John F. (Author), Jensen, Eric L. N. (Author), Montet, Benjamin T. (Author), Ottoni, Gael (Author), Schwarz, Richard P. (Author), Rojas, Felipe (Author), Nespral, David (Author), Torres, Pascal (Author), Mengel, Matthew W. (Author), Udry, Stephane (Author), Zapata, Abner (Author), Snoddy, Erin (Author), Okumura, Jack (Author), Ricker, George R. (Author), Vanderspek, Roland K. (Author), Latham, David W. (Author), Winn, Joshua N. (Author), Seager, Sara (Author), Jenkins, Jon M. (Author), Colon, Knicole D. (Author), Henze, Christopher E. (Author), Krishnamurthy, Akshata (Author), Ting, Eric B. (Author), Vezie, Michael (Author) and Villanueva, Steven (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 161 (2) |
Article Number | 82 |
Number of Pages | 24 |
Year | 2021 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/abd187 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/abd187 |
Abstract | We report the discovery of two short-period Saturn-mass planets, one transiting the G subgiant TOI-954 (TIC 44792534, V = 10.343, T = 9.78) observed in TESS sectors 4 and 5 and one transiting the G dwarf K2-329 (EPIC 246193072, V = 12.70, K = 10.67) observed in K2 campaigns 12 and 19. We confirm and characterize these two planets with a variety of ground-based archival and follow-up observations, including photometry, reconnaissance spectroscopy, precise radial velocity, and high-resolution imaging. Combining all available data, we find that TOI-954 b has a radius of 0.852+0.053-0.062 RJ and a mass of 0.174+0.018-0.017 MJ and is in a 3.68 day orbit, while K2-329 b has a radius of 0.774+0.026-0.024 RJ and a mass of 0.260+0.020-0.022 MJ and is in a 12.46 day orbit. As TOI-954 b is 30 times more irradiated than K2-329 b but more or less the same size, these two planets provide an opportunity to test whether irradiation leads to inflation of Saturn-mass planets and contribute to future comparative studies that explore Saturn-mass planets at contrasting points in their lifetimes. |
Keywords | exoplanet systems; photometry; transit photometry; spectroscopy; high; resolution spectroscopy; RV; G stars; G dwarf stars; G subgiant stars; hot Jupiters; 484; 1234; 1709; 1558; 2096; 1332; 558; 556; 560; 753; astrophysics; |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Massachusetts Institute of Technology, United States |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of Texas at Austin, United States | |
Adolfo Ibanez University, Chile | |
University of Geneva, Switzerland | |
University of Toronto, Canada | |
University of Tokyo, Japan | |
Vanderbilt University, United States | |
Centre for Astrophysics | |
Carnegie Institution of Washington, United States | |
Space Telescope Science Institute, United States | |
Princeton University, United States | |
George Mason University, United States | |
University of Warwick, United Kingdom | |
Max Planck Society, Germany | |
Perth Exoplanet Survey Telescope Observatory, Australia | |
University of Texas at Dallas, United States | |
University of California, United States | |
University of North Carolina, United States | |
University of Atacama, Chile | |
California Institute of Technology (Caltech), United States | |
University of Chile, Chile | |
University of New Mexico, United States | |
Pontifical Catholic University of Chile, Chile | |
University of Chicago, United States | |
Nanjing University, China | |
School of Mathematics, Physics and Computing | |
Swarthmore College, United States | |
University of New South Wales | |
Patashnick Voorheesville Observatory, United States | |
Institute of Astrophysics of the Canary Islands, Spain | |
NASA Ames Research Center, United States | |
NASA Goddard Space Flight Center, United States |
https://research.usq.edu.au/item/q67vy/toi-954-b-and-k2-329-b-short-period-saturn-mass-planets-that-test-whether-irradiation-leads-to-inflation
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