The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope*
<jats:title>Abstract</jats:title> <jats:p>We report the discovery of TOI-2180 b, a 2.8 <jats:italic>M</jats:italic> <jats:sub>J</jats:sub> giant planet orbiting a slightly evolved G5 host star. This planet transited only on...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Astronomical Society
2022
|
| Online Access: | https://hdl.handle.net/1721.1/142266 |
| _version_ | 1826190487126540288 |
|---|---|
| author | Vanderburg, Andrew Seager, Sara |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Vanderburg, Andrew Seager, Sara |
| author_sort | Vanderburg, Andrew |
| collection | MIT |
| description | <jats:title>Abstract</jats:title>
<jats:p>We report the discovery of TOI-2180 b, a 2.8 <jats:italic>M</jats:italic>
<jats:sub>J</jats:sub> giant planet orbiting a slightly evolved G5 host star. This planet transited only once in Cycle 2 of the primary Transiting Exoplanet Survey Satellite (TESS) mission. Citizen scientists identified the 24 hr single-transit event shortly after the data were released, allowing a Doppler monitoring campaign with the Automated Planet Finder telescope at Lick Observatory to begin promptly. The radial velocity observations refined the orbital period of TOI-2180 b to be 260.8 ± 0.6 days, revealed an orbital eccentricity of 0.368 ± 0.007, and discovered long-term acceleration from a more distant massive companion. We conducted ground-based photometry from 14 sites spread around the globe in an attempt to detect another transit. Although we did not make a clear transit detection, the nondetections improved the precision of the orbital period. We predict that TESS will likely detect another transit of TOI-2180 b in Sector 48 of its extended mission. We use giant planet structure models to retrieve the bulk heavy-element content of TOI-2180 b. When considered alongside other giant planets with orbital periods over 100 days, we find tentative evidence that the correlation between planet mass and metal enrichment relative to stellar is dependent on orbital properties. Single-transit discoveries like TOI-2180 b highlight the exciting potential of the TESS mission to find planets with long orbital periods and low irradiation fluxes despite the selection biases associated with the transit method.</jats:p> |
| first_indexed | 2024-09-23T08:40:41Z |
| format | Article |
| id | mit-1721.1/142266 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:40:41Z |
| publishDate | 2022 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1422662023-07-28T20:05:53Z The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope* Vanderburg, Andrew Seager, Sara Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research <jats:title>Abstract</jats:title> <jats:p>We report the discovery of TOI-2180 b, a 2.8 <jats:italic>M</jats:italic> <jats:sub>J</jats:sub> giant planet orbiting a slightly evolved G5 host star. This planet transited only once in Cycle 2 of the primary Transiting Exoplanet Survey Satellite (TESS) mission. Citizen scientists identified the 24 hr single-transit event shortly after the data were released, allowing a Doppler monitoring campaign with the Automated Planet Finder telescope at Lick Observatory to begin promptly. The radial velocity observations refined the orbital period of TOI-2180 b to be 260.8 ± 0.6 days, revealed an orbital eccentricity of 0.368 ± 0.007, and discovered long-term acceleration from a more distant massive companion. We conducted ground-based photometry from 14 sites spread around the globe in an attempt to detect another transit. Although we did not make a clear transit detection, the nondetections improved the precision of the orbital period. We predict that TESS will likely detect another transit of TOI-2180 b in Sector 48 of its extended mission. We use giant planet structure models to retrieve the bulk heavy-element content of TOI-2180 b. When considered alongside other giant planets with orbital periods over 100 days, we find tentative evidence that the correlation between planet mass and metal enrichment relative to stellar is dependent on orbital properties. Single-transit discoveries like TOI-2180 b highlight the exciting potential of the TESS mission to find planets with long orbital periods and low irradiation fluxes despite the selection biases associated with the transit method.</jats:p> 2022-05-03T19:02:34Z 2022-05-03T19:02:34Z 2022-02-01 2022-05-03T18:56:31Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142266 Vanderburg, Andrew and Seager, Sara. 2022. "The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope*." The Astronomical Journal, 163 (2). en 10.3847/1538-3881/ac415b The Astronomical Journal Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0 application/pdf American Astronomical Society American Astronomical Society |
| spellingShingle | Vanderburg, Andrew Seager, Sara The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope* |
| title | The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope* |
| title_full | The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope* |
| title_fullStr | The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope* |
| title_full_unstemmed | The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope* |
| title_short | The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope* |
| title_sort | tess keck survey viii confirmation of a transiting giant planet on an eccentric 261 day orbit with the automated planet finder telescope |
| url | https://hdl.handle.net/1721.1/142266 |
| work_keys_str_mv | AT vanderburgandrew thetesskecksurveyviiiconfirmationofatransitinggiantplanetonaneccentric261dayorbitwiththeautomatedplanetfindertelescope AT seagersara thetesskecksurveyviiiconfirmationofatransitinggiantplanetonaneccentric261dayorbitwiththeautomatedplanetfindertelescope AT vanderburgandrew tesskecksurveyviiiconfirmationofatransitinggiantplanetonaneccentric261dayorbitwiththeautomatedplanetfindertelescope AT seagersara tesskecksurveyviiiconfirmationofatransitinggiantplanetonaneccentric261dayorbitwiththeautomatedplanetfindertelescope |