dc.contributor.author | Sporer, A. | |
dc.contributor.author | Ricker, George R | |
dc.contributor.author | Seager, Sara | |
dc.date.accessioned | 2022-09-19T16:01:55Z | |
dc.date.available | 2021-10-27T20:24:24Z | |
dc.date.available | 2022-09-19T16:01:55Z | |
dc.date.issued | 2021 | |
dc.identifier.uri | https://hdl.handle.net/1721.1/135642.2 | |
dc.description.abstract | <jats:title>ABSTRACT</jats:title>
<jats:p>We report on the discovery and validation of a two-planet system around a bright (V = 8.85 mag) early G dwarf (1.43 R⊙, 1.15 M⊙, TOI 2319) using data from NASA’s Transiting Exoplanet Survey Satellite (TESS). Three transit events from two planets were detected by citizen scientists in the month-long TESS light curve (sector 25), as part of the Planet Hunters TESS project. Modelling of the transits yields an orbital period of $11.6264 _{ - 0.0025 } ^ { + 0.0022 }$ d and radius of $3.41 _{ - 0.12 } ^ { + 0.14 }$ R⊕ for the inner planet, and a period in the range 19.26–35 d and a radius of $5.83 _{ - 0.14 } ^ { + 0.14 }$ R⊕ for the outer planet, which was only seen to transit once. Each signal was independently statistically validated, taking into consideration the TESS light curve as well as the ground-based spectroscopic follow-up observations. Radial velocities from HARPS-N and EXPRES yield a tentative detection of planet b, whose mass we estimate to be $11.56 _{ - 6.14 } ^ { + 6.58 }$ M⊕, and allow us to place an upper limit of 27.5 M⊕ (99 per cent confidence) on the mass of planet c. Due to the brightness of the host star and the strong likelihood of an extended H/He atmosphere on both planets, this system offers excellent prospects for atmospheric characterization and comparative planetology.</jats:p> | en_US |
dc.language.iso | en | |
dc.publisher | Oxford University Press (OUP) | en_US |
dc.relation.isversionof | 10.1093/mnras/stab1253 | en_US |
dc.rights | Creative Commons Attribution-Noncommercial-Share Alike | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | en_US |
dc.source | arXiv | en_US |
dc.title | Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843 | en_US |
dc.type | Article | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | en_US |
dc.contributor.department | MIT Kavli Institute for Astrophysics and Space Research | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics | en_US |
dc.relation.journal | Monthly Notices of the Royal Astronomical Society | en_US |
dc.eprint.version | Author's final manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dc.date.updated | 2021-09-27T18:24:12Z | |
dspace.orderedauthors | Eisner, NL; Nicholson, BA; Barragán, O; Aigrain, S; Lintott, C; Kaye, L; Klein, B; Miller, G; Taylor, J; Zicher, N; Buchhave, LA; Caldwell, DA; Horner, J; Llama, J; Mortier, A; Rajpaul, VM; Stassun, K; Sporer, A; Tkachenko, A; Jenkins, JM; Latham, D; Ricker, G; Seager, S; Winn, J; Alhassan, S; Baeten, EML; Bean, SJ; Bundy, DM; Efremov, V; Ferstenou, R; Goodwin, BL; Hof, M; Hoffman, T; Hubert, A; Lau, L; Lee, S; Maetschke, D; Peltsch, K; Rubio-Alfaro, C; Wilson, GM | en_US |
dspace.date.submission | 2021-09-27T18:24:13Z | |
mit.journal.volume | 505 | en_US |
mit.journal.issue | 2 | en_US |
mit.license | OPEN_ACCESS_POLICY | |
mit.metadata.status | Publication Information Needed | en_US |