A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b
Aims. We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b. Methods. We jointly analyzed space (TESS mission) and ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light curves using our multicolor photometry transit analysis pipelin...
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2023
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| Online Access: | https://hdl.handle.net/1721.1/148418 |
| _version_ | 1826194962287427584 |
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| author | Seager, Sara |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Seager, Sara |
| author_sort | Seager, Sara |
| collection | MIT |
| description | Aims. We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b.
Methods. We jointly analyzed space (TESS mission) and ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light
curves using our multicolor photometry transit analysis pipeline. This allowed us to compute contamination limits for both candidates
and validate them as planet-sized companions.
Results. We found TOI-4479b to be a sub-Neptune-sized planet (Rp = 2.82+0.65
−0.63 R⊕) and TOI-2081b to be a super-Earth-sized planet
(Rp = 2.04+0.50
−0.54 R⊕). Furthermore, we obtained that TOI-4479b, with a short orbital period of 1.15890+0.00002
−0.00001 days, lies within the
Neptune desert and is in fact the largest nearly ultra-short period planet around an M dwarf known to date.
Conclusions. These results make TOI-4479b rare among the currently known exoplanet population of M dwarf stars and an especially
interesting target for spectroscopic follow-up and future studies of planet formation and evolution |
| first_indexed | 2024-09-23T10:04:34Z |
| format | Article |
| id | mit-1721.1/148418 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:04:34Z |
| publishDate | 2023 |
| publisher | EDP Sciences |
| record_format | dspace |
| spelling | mit-1721.1/1484182023-03-09T03:38:20Z A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b Seager, Sara Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Aims. We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b. Methods. We jointly analyzed space (TESS mission) and ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light curves using our multicolor photometry transit analysis pipeline. This allowed us to compute contamination limits for both candidates and validate them as planet-sized companions. Results. We found TOI-4479b to be a sub-Neptune-sized planet (Rp = 2.82+0.65 −0.63 R⊕) and TOI-2081b to be a super-Earth-sized planet (Rp = 2.04+0.50 −0.54 R⊕). Furthermore, we obtained that TOI-4479b, with a short orbital period of 1.15890+0.00002 −0.00001 days, lies within the Neptune desert and is in fact the largest nearly ultra-short period planet around an M dwarf known to date. Conclusions. These results make TOI-4479b rare among the currently known exoplanet population of M dwarf stars and an especially interesting target for spectroscopic follow-up and future studies of planet formation and evolution 2023-03-08T16:22:33Z 2023-03-08T16:22:33Z 2022 2023-03-08T16:18:26Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/148418 Seager, Sara. 2022. "A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b." Astronomy and Astrophysics, 666. en 10.1051/0004-6361/202243731 Astronomy and Astrophysics Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf EDP Sciences EDP Sciences |
| spellingShingle | Seager, Sara A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b |
| title | A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b |
| title_full | A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b |
| title_fullStr | A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b |
| title_full_unstemmed | A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b |
| title_short | A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs: Color validation of TOI-4479b and TOI-2081b |
| title_sort | hot sub neptune in the desert and a temperate super earth around faint m dwarfs color validation of toi 4479b and toi 2081b |
| url | https://hdl.handle.net/1721.1/148418 |
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