| _version_ |
1826208207615295488
|
| collection |
MIT
|
| description |
© 2020. The American Astronomical Society. All rights reserved. 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.
|
| first_indexed |
2024-09-23T14:02:14Z
|
| format |
Article
|
| id |
mit-1721.1/134574
|
| institution |
Massachusetts Institute of Technology
|
| language |
English
|
| last_indexed |
2024-09-23T14:02:14Z
|
| publishDate |
2021
|
| publisher |
American Astronomical Society
|
| record_format |
dspace
|
| spelling |
mit-1721.1/1345742021-10-28T03:43:59Z TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert © 2020. The American Astronomical Society. All rights reserved. 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. 2021-10-27T20:05:37Z 2021-10-27T20:05:37Z 2020 2021-09-28T17:51:28Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134574 en 10.3847/1538-3881/ABAC0C Astronomical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Astronomical Society The American Astronomical Society
|
| spellingShingle |
TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert
|
| title |
TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert
|
| title_full |
TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert
|
| title_fullStr |
TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert
|
| title_full_unstemmed |
TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert
|
| title_short |
TOI-824 b: A New Planet on the Lower Edge of the Hot Neptune Desert
|
| title_sort |
toi 824 b a new planet on the lower edge of the hot neptune desert
|
| url |
https://hdl.handle.net/1721.1/134574
|