TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission
<jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery of TOI-2119b, a transiting brown dwarf (BD) that orbits and is completely eclipsed by an active M-dwarf star. Using light-curve data from the Transiting Exoplanet Survey Satellite mission and follow-u...
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| Format: | Article |
| Language: | English |
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Oxford University Press (OUP)
2023
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| Online Access: | https://hdl.handle.net/1721.1/148406 |
| _version_ | 1811091660372705280 |
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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 | <jats:title>ABSTRACT</jats:title>
<jats:p>We report the discovery of TOI-2119b, a transiting brown dwarf (BD) that orbits and is completely eclipsed by an active M-dwarf star. Using light-curve data from the Transiting Exoplanet Survey Satellite mission and follow-up high-resolution Doppler spectroscopic observations, we find the BD has a radius of Rb = 1.08 ± 0.03RJ, a mass of Mb = 64.4 ± 2.3MJ, an orbital period of P = 7.200865 ± 0.00002 d, and an eccentricity of e = 0.337 ± 0.002. The host star has a mass of M⋆ = 0.53 ± 0.02M⊙, a radius of R⋆ = 0.50 ± 0.01R⊙, an effective temperature of Teff = 3621 ± 48K, and a metallicity of $\rm [Fe/H]=+0.06\pm 0.08$. TOI-2119b joins an emerging population of transiting BDs around M-dwarf host stars, with TOI-2119 being the ninth such system. These M-dwarf–brown dwarf systems typically occupy mass ratios near q = Mb/M⋆ ≈ 0.1−0.2, which separates them from the typical mass ratios for systems with transiting substellar objects and giant exoplanets that orbit more massive stars. The nature of the secondary eclipse of the BD by the star enables us to estimate the effective temperature of the substellar object to be 2030 ± 84K, which is consistent with predictions by substellar evolutionary models.</jats:p> |
| first_indexed | 2024-09-23T15:05:54Z |
| format | Article |
| id | mit-1721.1/148406 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:05:54Z |
| publishDate | 2023 |
| publisher | Oxford University Press (OUP) |
| record_format | dspace |
| spelling | mit-1721.1/1484062023-03-08T03:09:59Z TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission Seager, Sara Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences <jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery of TOI-2119b, a transiting brown dwarf (BD) that orbits and is completely eclipsed by an active M-dwarf star. Using light-curve data from the Transiting Exoplanet Survey Satellite mission and follow-up high-resolution Doppler spectroscopic observations, we find the BD has a radius of Rb = 1.08 ± 0.03RJ, a mass of Mb = 64.4 ± 2.3MJ, an orbital period of P = 7.200865 ± 0.00002 d, and an eccentricity of e = 0.337 ± 0.002. The host star has a mass of M⋆ = 0.53 ± 0.02M⊙, a radius of R⋆ = 0.50 ± 0.01R⊙, an effective temperature of Teff = 3621 ± 48K, and a metallicity of $\rm [Fe/H]=+0.06\pm 0.08$. TOI-2119b joins an emerging population of transiting BDs around M-dwarf host stars, with TOI-2119 being the ninth such system. These M-dwarf–brown dwarf systems typically occupy mass ratios near q = Mb/M⋆ ≈ 0.1−0.2, which separates them from the typical mass ratios for systems with transiting substellar objects and giant exoplanets that orbit more massive stars. The nature of the secondary eclipse of the BD by the star enables us to estimate the effective temperature of the substellar object to be 2030 ± 84K, which is consistent with predictions by substellar evolutionary models.</jats:p> 2023-03-07T19:26:57Z 2023-03-07T19:26:57Z 2022 2023-03-07T19:02:47Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/148406 Seager, Sara. 2022. "TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission." Monthly Notices of the Royal Astronomical Society, 514 (4). en 10.1093/MNRAS/STAC1666 Monthly Notices of the Royal Astronomical Society Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Oxford University Press (OUP) Oxford University Press |
| spellingShingle | Seager, Sara TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission |
| title | TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission |
| title_full | TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission |
| title_fullStr | TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission |
| title_full_unstemmed | TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission |
| title_short | TOI-2119: A transiting brown dwarf orbiting an active M-dwarf from NASA’s TESS mission |
| title_sort | toi 2119 a transiting brown dwarf orbiting an active m dwarf from nasa s tess mission |
| url | https://hdl.handle.net/1721.1/148406 |
| work_keys_str_mv | AT seagersara toi2119atransitingbrowndwarforbitinganactivemdwarffromnasastessmission |