TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant
While the population of confirmed exoplanets continues to grow, the sample of confirmed transiting planets around evolved stars is still limited. We present the discovery and confirmation of a hot Jupiter orbiting TOI-2184 (TIC 176956893), a massive evolved subgiant (M⋆ = 1.53 ± 0.12 M⊙, R⋆ = 2.90 ±...
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| Format: | Article |
| Language: | English |
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American Astronomical Society
2023
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| Online Access: | https://hdl.handle.net/1721.1/148485 |
| _version_ | 1826196271956754432 |
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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 | While the population of confirmed exoplanets continues to grow, the sample of confirmed transiting planets around evolved stars is still limited. We present the discovery and confirmation of a hot Jupiter orbiting TOI-2184 (TIC 176956893), a massive evolved subgiant (M⋆ = 1.53 ± 0.12 M⊙, R⋆ = 2.90 ± 0.14 R⊙) in the Transiting Exoplanet Survey Satellite (TESS) Southern Continuous Viewing Zone. The planet was flagged as a false positive by the TESS Quick-Look Pipeline due to periodic systematics introducing a spurious depth difference between even and odd transits. Using a new pipeline to remove background scattered light in TESS Full Frame Image data, we combine space-based TESS photometry, ground-based photometry, and ground-based radial velocity measurements to report a planet radius of Rp = 1.017 ± 0.051 RJ and mass of Mp = 0.65 ± 0.16 MJ. For a planet so close to its star, the mass and radius of TOI-2184b are unusually well matched to those of Jupiter. We find that the radius of TOI-2184b is smaller than theoretically predicted based on its mass and incident flux, providing a valuable new constraint on the timescale of post-main-sequence planet inflation. The discovery of TOI-2184b demonstrates the feasibility of detecting planets around faint (TESS magnitude > 12) post-main-sequence stars and suggests that many more similar systems are waiting to be detected in the TESS FFIs, whose confirmation may elucidate the final stages of planetary system evolution. |
| first_indexed | 2024-09-23T10:24:17Z |
| format | Article |
| id | mit-1721.1/148485 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:24:17Z |
| publishDate | 2023 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1484852023-03-11T03:39:14Z TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant Seager, Sara Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences While the population of confirmed exoplanets continues to grow, the sample of confirmed transiting planets around evolved stars is still limited. We present the discovery and confirmation of a hot Jupiter orbiting TOI-2184 (TIC 176956893), a massive evolved subgiant (M⋆ = 1.53 ± 0.12 M⊙, R⋆ = 2.90 ± 0.14 R⊙) in the Transiting Exoplanet Survey Satellite (TESS) Southern Continuous Viewing Zone. The planet was flagged as a false positive by the TESS Quick-Look Pipeline due to periodic systematics introducing a spurious depth difference between even and odd transits. Using a new pipeline to remove background scattered light in TESS Full Frame Image data, we combine space-based TESS photometry, ground-based photometry, and ground-based radial velocity measurements to report a planet radius of Rp = 1.017 ± 0.051 RJ and mass of Mp = 0.65 ± 0.16 MJ. For a planet so close to its star, the mass and radius of TOI-2184b are unusually well matched to those of Jupiter. We find that the radius of TOI-2184b is smaller than theoretically predicted based on its mass and incident flux, providing a valuable new constraint on the timescale of post-main-sequence planet inflation. The discovery of TOI-2184b demonstrates the feasibility of detecting planets around faint (TESS magnitude > 12) post-main-sequence stars and suggests that many more similar systems are waiting to be detected in the TESS FFIs, whose confirmation may elucidate the final stages of planetary system evolution. 2023-03-10T19:43:31Z 2023-03-10T19:43:31Z 2022 2023-03-10T19:33:35Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/148485 Seager, Sara. 2022. "TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant." Astronomical Journal, 163 (2). en 10.3847/1538-3881/AC38A1 Astronomical Journal Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Astronomical Society The American Astronomical Society |
| spellingShingle | Seager, Sara TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant |
| title | TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant |
| title_full | TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant |
| title_fullStr | TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant |
| title_full_unstemmed | TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant |
| title_short | TESS Giants Transiting Giants. I: A Noninflated Hot Jupiter Orbiting a Massive Subgiant |
| title_sort | tess giants transiting giants i a noninflated hot jupiter orbiting a massive subgiant |
| url | https://hdl.handle.net/1721.1/148485 |
| work_keys_str_mv | AT seagersara tessgiantstransitinggiantsianoninflatedhotjupiterorbitingamassivesubgiant |