TOI-3362b: A Proto Hot Jupiter Undergoing High-eccentricity Tidal Migration
Article
Article Title | TOI-3362b: A Proto Hot Jupiter Undergoing High-eccentricity Tidal Migration |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | Dong, Jiayin (Author), Huang, Chelsea X. (Author), Zhou, George (Author), Dawson, Rebekah I. (Author), Rodriguez, Joseph E. (Author), Eastman, Jason D. (Author), Collins, Karen A. (Author), Quinn, Samuel N. (Author), Shporer, Avi (Author), Triaud, Amaury H. M. J. (Author), Wang, Songhu (Author), Beatty, Thomas (Author), Jackson, Jonathon M. (Author), Collins, Kevin I. (Author), Abe, Lyu (Author), Suarez, Olga (Author), Crouzet, Nicolas (Author), Mekarnia, Djamel (Author), Dransfield, Georgina (Author), Jensen, Eric L. N. (Author), Stockdale, Chris (Author), Barkaoui, Khalid (Author), Heitzmann, Alexis (Author), Wright, Duncan J. (Author), Addison, Brett C. (Author), Wittenmyer, Robert A. (Author), Okumura, Jack (Author), Bowler, Brendan P. (Author), Horner, Jonathan (Author), Kane, Stephen R. (Author), Kielkopf, John (Author), Liu, Huigen (Author), Plavchan, Peter (Author), Mengel, Matthew W. (Author), Ricker, George R. (Author), Vanderspek, Roland (Author), Latham, David W. (Author), Seager, S. (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Christiansen, Jessie L. (Author) and Paegert, Martin (Author) |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 920 (1), pp. 1-11 |
Article Number | L16 |
Number of Pages | 11 |
Year | 2021 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/2041-8213/ac2600 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/2041-8213/ac2600 |
Abstract | High-eccentricity tidal migration is a possible way for giant planets to be placed in short-period orbits. If this happens often, one would expect to catch proto hot Jupiters on highly elliptical orbits undergoing high-eccentricity tidal migration. As of yet, few such systems have been discovered. Here, we introduce TOI-3362b (TIC-464300749b), an 18.1 day, 5 MJup planet orbiting a main-sequence F-type star that is likely undergoing high-eccentricity tidal migration. The orbital eccentricity is 0.815-0.032+0.023. With a semimajor axis of 0.153-0.003+0.002 au, the planet's orbit is expected to shrink to a final orbital radius of 0.051-0.006+0.008 au after complete tidal circularization. Several mechanisms could explain the extreme value of the planet's eccentricity, such as planet-planet scattering and secular interactions. Such hypotheses can be tested with follow-up observations of the system, e.g., measuring the stellar obliquity and searching for companions in the system with precise, long-term radial-velocity observations. The variation in the planet's equilibrium temperature as it orbits the host star and the tidal heating at periapse make this planet an intriguing target for atmospheric modeling and observation. Because the planet's orbital period of 18.1 days is near the limit of TESS's period sensitivity, even a few such discoveries suggest that proto hot Jupiters may be quite common. |
Keywords | Exoplanet astronomy; Hot Jupiters; Transit photometry; Radial; velocity; Exoplanet migration; 486; 753; 1709; 1332; 2205; Astrophysics; Earth and Planetary 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 | Pennsylvania State University, United States |
Massachusetts Institute of Technology, United States | |
Centre for Astrophysics | |
Michigan State University, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of Birmingham, United Kingdom | |
Indiana University Bloomington, United States | |
University of Arizona, United States | |
George Mason University, United States | |
Cote d'Azur University, France | |
European Space Agency, France | |
Swarthmore College, United States | |
Hazelwood Observatory, Australia | |
Cadi Ayyad University, Morocco | |
University of Texas at Austin, United States | |
University of California, United States | |
School of Mathematics, Physics and Computing | |
Nanjing University, China | |
Princeton University, United States | |
NASA Ames Research Center, United States | |
National Aeronautics and Space Administration (NASA), United States |
https://research.usq.edu.au/item/q6wv1/toi-3362b-a-proto-hot-jupiter-undergoing-high-eccentricity-tidal-migration
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