TESS re-observes the young multi-planet system TOI-451: refined ephemeris and activity evolution
We present a new analysis of the light curve of the young planet-hosting star TOI 451 in the light of new observations from TESS Cycle 3. Our joint analysis of the transits of all three planets, using all available TESS data, results in an improved ephemeris for TOI 451 b and TOI 451 c, which will h...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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American Astronomical Society
2021
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| _version_ | 1826259873164165120 |
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| author | Barragan, O Aigrain, S Gillen, E Gutiérrez-Canales, F |
| author_facet | Barragan, O Aigrain, S Gillen, E Gutiérrez-Canales, F |
| author_sort | Barragan, O |
| collection | OXFORD |
| description | We present a new analysis of the light curve of the young planet-hosting star TOI 451 in the light of new observations from TESS Cycle 3. Our joint analysis of the transits of all three planets, using all available TESS data, results in an improved ephemeris for TOI 451 b and TOI 451 c, which will help to plan follow-up observations. The updated mid-transit times are BJD–2,457,000 = ${1410.9896}_{-0.0029}^{+0.0032}$ , ${1411.7982}_{-0.0020}^{+0.0022}$, and ${1416.63407}_{-0.00100}^{+0.00096}$ for TOI 451 b, c, and d, respectively, and the periods are ${1.8587028}_{-10e-06}^{+08e-06}$, ${9.192453}_{-3.3e-05}^{+4.1e-05}$ , and ${16.364932}_{-3.5e-05}^{+3.6e-05}$ days. We also model the out-of-transit light curve using a Gaussian Process with a quasi-periodic kernel, and infer a change in the properties of the active regions on the surface of TOI 451 between TESS Cycles 1 and 3.
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| first_indexed | 2024-03-06T18:56:41Z |
| format | Journal article |
| id | oxford-uuid:12131230-0112-4117-94dd-1f17badacb7f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:56:41Z |
| publishDate | 2021 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | oxford-uuid:12131230-0112-4117-94dd-1f17badacb7f2022-03-26T10:05:50ZTESS re-observes the young multi-planet system TOI-451: refined ephemeris and activity evolutionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:12131230-0112-4117-94dd-1f17badacb7fEnglishSymplectic ElementsAmerican Astronomical Society2021Barragan, OAigrain, SGillen, EGutiérrez-Canales, FWe present a new analysis of the light curve of the young planet-hosting star TOI 451 in the light of new observations from TESS Cycle 3. Our joint analysis of the transits of all three planets, using all available TESS data, results in an improved ephemeris for TOI 451 b and TOI 451 c, which will help to plan follow-up observations. The updated mid-transit times are BJD–2,457,000 = ${1410.9896}_{-0.0029}^{+0.0032}$ , ${1411.7982}_{-0.0020}^{+0.0022}$, and ${1416.63407}_{-0.00100}^{+0.00096}$ for TOI 451 b, c, and d, respectively, and the periods are ${1.8587028}_{-10e-06}^{+08e-06}$, ${9.192453}_{-3.3e-05}^{+4.1e-05}$ , and ${16.364932}_{-3.5e-05}^{+3.6e-05}$ days. We also model the out-of-transit light curve using a Gaussian Process with a quasi-periodic kernel, and infer a change in the properties of the active regions on the surface of TOI 451 between TESS Cycles 1 and 3. |
| spellingShingle | Barragan, O Aigrain, S Gillen, E Gutiérrez-Canales, F TESS re-observes the young multi-planet system TOI-451: refined ephemeris and activity evolution |
| title | TESS re-observes the young multi-planet system TOI-451: refined ephemeris and activity evolution |
| title_full | TESS re-observes the young multi-planet system TOI-451: refined ephemeris and activity evolution |
| title_fullStr | TESS re-observes the young multi-planet system TOI-451: refined ephemeris and activity evolution |
| title_full_unstemmed | TESS re-observes the young multi-planet system TOI-451: refined ephemeris and activity evolution |
| title_short | TESS re-observes the young multi-planet system TOI-451: refined ephemeris and activity evolution |
| title_sort | tess re observes the young multi planet system toi 451 refined ephemeris and activity evolution |
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