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dc.contributor.authorSporer, A.
dc.contributor.authorRicker, George R
dc.contributor.authorSeager, Sara
dc.date.accessioned2022-09-19T16:01:55Z
dc.date.available2021-10-27T20:24:24Z
dc.date.available2022-09-19T16:01:55Z
dc.date.issued2021
dc.identifier.urihttps://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.isoen
dc.publisherOxford University Press (OUP)en_US
dc.relation.isversionof10.1093/mnras/stab1253en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourcearXiven_US
dc.titlePlanet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843en_US
dc.typeArticleen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Aeronautics and Astronauticsen_US
dc.relation.journalMonthly Notices of the Royal Astronomical Societyen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2021-09-27T18:24:12Z
dspace.orderedauthorsEisner, 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, GMen_US
dspace.date.submission2021-09-27T18:24:13Z
mit.journal.volume505en_US
mit.journal.issue2en_US
mit.licenseOPEN_ACCESS_POLICY
mit.metadata.statusPublication Information Neededen_US


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