TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert
Article
Article Title | TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Burt, Jennifer A. (Author), Nielsen, Louise D. (Author), Quinn, Samuel N. (Author), Mamajek, Eric E. (Author), Matthews, Elisabeth C. (Author), Zhou, George (Author), Seidel, Julia V. (Author), Huang, Chelsea X. (Author), Lopez, Eric (Author), Soto, Maritza (Author), Otegi, Jon (Author), Stassun, Keivan G. (Author), Kreidberg, Laura (Author), Collins, Karen A. (Author), Eastman, Jason D. (Author), Rodriguez, Joseph E. (Author), Vanderburg, Andrew (Author), Halverson, Samuel P. (Author), Teske, Johanna K. (Author), Wang, Sharon X. (Author), Butler, R. Paul (Author), Bouchy, Francois (Author), Dumusque, Xavier (Author), Segransen, Damien (Author), Shectman, Stephen A. (Author), Crane, Jeffrey D. (Author), Feng, Fabo (Author), Montet, Benjamin T. (Author), Feinstein, Adina D. (Author), Beletski, Yuri (Author), Flowers, Erin (Author), Gunther, Maximilian N. (Author), Daylan, Tansu (Author), Collins, Kevin I. (Author), Conti, Dennis M. (Author), Gan, Tianjun (Author), Jensen, Eric L. N. (Author), Kielkopf, John F. (Author), Tan, Thiam-Guan (Author), Helled, Ravit (Author), Dorn, Caroline (Author), Haldemann, Jonas (Author), Lissauer, Jack J. (Author), Ricker, George R. (Author), Vanderspek, Roland (Author), Latham, David W. (Author), Seager, S. (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Twicken, Joseph D. (Author), Smith, Jeffrey C. (Author), Tenenbaum, Peter (Author), Cartwright, Scott (Author), Barclay, Thomas (Author), Pepper, Joshua (Author), Esquerdo, Gilbert (Author) and Fong, William (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 160 (4), pp. 1-16 |
Article Number | 153 |
Number of Pages | 16 |
Year | 2020 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/abac0c |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/abac0c |
Abstract | We report the detection of a transiting hot Neptune exoplanet orbiting TOI-824 (SCR J1448-5735), a nearby (d = 64 pc) K4V star, using data from the Transiting Exoplanet Survey Satellite. The newly discovered planet has a radius R p = 2.93 ± 0.20 R⊕ and an orbital period of 1.393 days. Radial velocity measurements using the Planet Finder Spectrograph and the High Accuracy Radial velocity Planet Searcher spectrograph confirm the existence of the planet, and we estimate its mass to be 18.47 ± 1.84 M⊕. The planet's mean density is ρp = 4.03-0.78+0.98 g cm-3, making it more than twice as dense as Neptune. TOI-824 b's high equilibrium temperature makes the planet likely to have a cloud-free atmosphere, and thus it is an excellent candidate for follow-up atmospheric studies. The detectability of TOI-824 b's atmosphere from both ground and space is promising and could lead to the detailed characterization of the most irradiated small planet at the edge of the hot Neptune desert that has retained its atmosphere to date. |
Keywords | Exoplanet astronomy; Exoplanet detection methods; Exoplanets; Transit photometry; Radial velocity; Stellar properties; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar 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 | California Institute of Technology (Caltech), United States |
University of Geneva, Switzerland | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Massachusetts Institute of Technology, United States | |
National Aeronautics and Space Administration (NASA), United States | |
Queen Mary University of London, United Kingdom | |
Vanderbilt University, United States | |
University of Wisconsin-Madison, United States | |
Carnegie Institution of Washington, United States | |
University of New South Wales | |
University of Chicago, United States | |
Las Campanas Observatory, Chile | |
Princeton University, United States | |
George Mason University, United States | |
American Association of Variable Star Observers, United States | |
Tsinghua University, China | |
Swarthmore College, United States | |
School of Mathematics, Physics and Computing | |
Perth Exoplanet Survey Telescope Observatory, Australia | |
University of Zurich, Switzerland | |
University of Bern, Switzerland | |
NASA Ames Research Center, United States | |
Proto-Logic Consulting, United States | |
NASA Goddard Space Flight Center, United States | |
Lehigh University, United States |
https://research.usq.edu.au/item/q6x30/toi-824-b-a-new-planet-on-the-lower-edge-of-the-hot-neptune-desert
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