TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert
| Autor: | Xavier Dumusque, Jon M. Jenkins, Jason D. Eastman, Ravit Helled, Samuel N. Quinn, M. Soto, Elisabeth Matthews, Roland Vanderspek, J. Haldemann, Jennifer Burt, Maximilian N. Günther, Sara Seager, Stephen A. Shectman, Karen A. Collins, Thiam-Guan Tan, George Zhou, Fabo Feng, Tansu Daylan, R. Paul Butler, George R. Ricker, Andrew Vanderburg, Sharon X. Wang, Keivan G. Stassun, Julia V. Seidel, Louise D. Nielsen, Joseph E. Rodriguez, Laura Kreidberg, Erin Flowers, Thomas Barclay, Jeffrey D. Crane, Jeffrey C. Smith, Gilbert A. Esquerdo, Benjamin T. Montet, Chelsea X. Huang, Eric E. Mamajek, Eric L. N. Jensen, Peter Tenenbaum, John F. Kielkopf, Tianjun Gan, Samuel Halverson, François Bouchy, Jack J. Lissauer, Damien Segransen, David W. Latham, Adina D. Feinstein, Caroline Dorn, Joshua Pepper, Johanna Teske, Eric D. Lopez, Joshua N. Winn, Dennis M. Conti, Kevin I. Collins, Joseph D. Twicken, J. F. Otegi, Scott Cartwright, Yuri Beletski, William Fong |
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| Jazyk: | angličtina |
| Předmět: |
Physics
Earth and Planetary Astrophysics (astro-ph.EP) 010504 meteorology & atmospheric sciences Star (game theory) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Orbital period 01 natural sciences Exoplanet Radial velocity Atmosphere Astrophysics - Solar and Stellar Astrophysics 13. Climate action Space and Planetary Science Planet Neptune 0103 physical sciences Hot Neptune Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | The Astronomical Journal |
| ISSN: | 1538-3881 0004-637X 0004-6361 1538-3873 0067-0049 |
| DOI: | 10.3847/1538-3881/abac0c |
| Popis: | 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 \textit{Transiting Exoplanet Survey Satellite} (TESS). The newly discovered planet has a radius, $R_{\rm{p}}$ = 2.93 $\pm$ 0.20 R$_{\oplus}$, and an orbital period of 1.393 days. Radial velocity measurements using the Planet Finder Spectrograph (PFS) and the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph confirm the existence of the planet and we estimate its mass to be $M_{\rm{p}}$ = 18.47 $\pm$ 1.84 M$_{\oplus}$. The planet's mean density is $\rho_{\rm{p}}$ = 4.03$^{+0.98}_{-0.78}$ 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 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. Comment: 22 pages, 10 figures. Accepted for publication in the Astronomical Journal |
| Databáze: | OpenAIRE |
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