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  • Eisner, N. L.University Of Oxford (author)

Planet Hunters Tess I: TOI 813, a subgiant hosting a transiting Saturn-sized planet on an 84-day orbit

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-01-23
  • Oxford University Press (OUP),2020
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:700c5b9d-e769-4312-86e6-bb1b0c933971
  • https://doi.org/10.1093/mnras/staa138DOI
  • https://research.chalmers.se/publication/517287URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:for swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We report on the discovery and validation of TOI 813 b (TIC55525572b), a transiting exoplanet identified by citizen scientists in data from NASA's Transiting Exoplanet Survey Satellite (TESS) and the first planet discovered by the Planet Hunters TESS project. The host star is a bright (V = 10.3 mag) subgiant (R* = 1.94 R☉, M☉ = 1.32 M☉). It was observed almost continuously by TESS during its first year of operations, during which time four individual transit events were detected. The candidate passed all the standard light curve-based vetting checks, and ground-based follow-up spectroscopy and speckle imaging enabled us to place an upper limit of 2 MJup (99 per cent confidence) on the mass of the companion, and to statistically validate its planetary nature. Detailed modelling of the transits yields a period of 83.8911+0.0027-0.0031 d, a planet radius of 6.71 ± 0.38 R⊕ and a semimajor axis of 0.423+0031-0.037 AU. The planet's orbital period combined with the evolved nature of the host star places this object in a relatively underexplored region of parameter space. We estimate that TOI 813 b induces a reflex motion in its host star with a semi-amplitude of ∼6 m s−1, making this a promising system to measure the mass of a relatively long-period transiting planet.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Barragán, O.University Of Oxford (author)
  • Aigrain, S.University Of Oxford (author)
  • Lintott, C.University Of Oxford (author)
  • Miller, G.University Of Oxford (author)
  • Zicher, N.University Of Oxford (author)
  • Boyajian, T. S.Louisiana State University (author)
  • Briceño, C. (author)
  • Bryant, E.The University of Warwick (author)
  • Christiansen, J. L.NASA Ames Research Center (author)
  • Feinstein, A. D.University of Chicago (author)
  • Flor-Torres, L. M.Universidad de Guanajuato (author)
  • Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology,Universiteit Leiden (UL),Leiden University (UL)(Swepub:cth)malfri (author)
  • Gandolfi, D.Universita degli Studi di Torino,University of Turin (author)
  • Gilbert, J.Australian National University (author)
  • Guerrero, N.Massachusetts Institute of Technology (MIT) (author)
  • Jenkins, Jon M.NASA Ames Research Center (author)
  • Jones, K.University Of Oxford (author)
  • Kristiansen, M. H.Danmarks Tekniske Universitet,Technical University of Denmark (author)
  • Vanderburg, A.The University of Texas at Austin, USA (author)
  • Law, N.The University of North Carolina System (author)
  • López-Sánchez, A. R.Macquarie University (author)
  • Mann, A.The University of North Carolina System (author)
  • Safron, E. J.Louisiana State University (author)
  • Schwamb, M. E.Queen's University Belfast,Gemini Observatory North (author)
  • Stassun, Keivan G.Vanderbilt University,Fisk University (author)
  • Osborn, H. P.Laboratoire d'Astrophysique de Marseille (author)
  • Wang, J.Yale University (author)
  • Zic, A.Commonwealth Scientific and Industrial Research Organisation (CSIRO),The University of Sydney (author)
  • Ziegler, C.University of Toronto (author)
  • Barnet, F. (author)
  • Bean, S. J. (author)
  • Bundy, D. M. (author)
  • Chetnik, Z. (author)
  • Dawson, J. L. (author)
  • Garstone, J. (author)
  • Stenner, A. G. (author)
  • Huten, M. (author)
  • Larish, S. (author)
  • Melanson, L. D. (author)
  • Mitchell, T. (author)
  • Moore, C. (author)
  • Peltsch, K. (author)
  • Rogers, D. J. (author)
  • Schuster, C. (author)
  • Smith, D. S. (author)
  • Simister, D. J. (author)
  • Tanner, C. (author)
  • Terentev, I. (author)
  • Tsymbal, A. (author)
  • University Of OxfordLouisiana State University (creator_code:org_t)

Related titles

  • In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)494:1, s. 750-7630035-87111365-2966

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