Three Super-Earths Transiting the Nearby Star GJ 9827

Research output: Research - peer-reviewJournal article

  • Prajwal Niraula
    Prajwal NiraulaAstronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA pniraula@wesleyan.edu 0000-0002-8052-3893
  • Seth Redfield
    Seth RedfieldAstronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA 0000-0003-3786-3486
  • Fei Dai
    Fei DaiDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 0000-0002-8958-0683
  • Oscar Barragán
    Oscar BarragánDipartimento di Fisica, Universitá di Torino, via P. Giuria 1, I-10125 Torino, Italy 0000-0003-0563-0493
  • Davide Gandolfi
    Davide GandolfiDipartimento di Fisica, Universitá di Torino, via P. Giuria 1, I-10125 Torino, Italy 0000-0001-8627-9628
  • P. Wilson Cauley
    P. Wilson CauleyAstronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA 0000-0001-9207-0564
  • Teruyuki Hirano
    Teruyuki HiranoDepartment of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan 0000-0003-3618-7535
  • Judith Korth
    Judith KorthRheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931, Köln, Germany
  • Alexis M. S. Smith
    Alexis M. S. SmithInstitute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, D-12489 Berlin, Germany 0000-0002-2386-4341
  • Jorge Prieto-Arranz
    Jorge Prieto-ArranzDepartamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Spain 0000-0002-4609-6269
  • Sascha Grziwa
    Sascha GrziwaRheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, Germany 0000-0003-3370-4058
  • Malcolm Fridlund
    Malcolm FridlundDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden 0000-0003-2180-9936
  • Carina M. Persson
    Carina M. PerssonDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden 0000-0003-1257-5146
  • Anders Bo Justesen
  • Joshua N. Winn
    Joshua N. WinnDepartment of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA 0000-0002-4265-047X
  • Simon Albrecht
  • William D. Cochran
    William D. CochranDepartment of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA 0000-0001-9662-3496
  • Szilard Csizmadia
    Szilard CsizmadiaInstitute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany anders.erikson@dlr.de
  • Girish M. Duvvuri
    Girish M. DuvvuriAstronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA 0000-0002-7119-2543
  • Michael Endl
    Michael EndlDepartment of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA 0000-0002-7714-6310
  • Artie P. Hatzes
    Artie P. HatzesThüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenberg, Germany
  • John H. Livingston
    John H. LivingstonDepartment of Astronomy, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-0033, Tokyo, Japan
  • Norio Narita
    Norio NaritaNational Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 0000-0001-8511-2981
  • David Nespral
    David NespralDepartamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
  • Grzegorz Nowak
    Grzegorz NowakDepartamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Spain 0000-0002-7031-7754
  • Martin Pätzold
    Martin PätzoldRheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931, Köln, Germany
  • Enric Palle
    Enric PalleDepartamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Spain 0000-0003-0987-1593
  • Vincent Van Eylen
We report on the discovery of three transiting planets around GJ 9827. The planets have radii of 1.75 ± 0.18, 1.36 ± 0.14, and {2.11}-0.21+0.22 R ⊕, and periods of 1.20896, 3.6480, and 6.2014 days, respectively. The detection was made in Campaign 12 observations as part of our K2 survey of nearby stars. GJ 9827 is a V = 10.39 mag K6V star at a distance of 30.3 ± 1.6 parsecs and the nearest star to be found hosting planets by Kepler and K2. The radial velocity follow-up, high-resolution imaging, and detection of multiple transiting objects near commensurability drastically reduce the false positive probability. The orbital periods of GJ 9827 b, c, and d planets are very close to the 1:3:5 mean motion resonance. Our preliminary analysis shows that GJ 9827 planets are excellent candidates for atmospheric observations. Besides, the planetary radii span both sides of the rocky and gaseous divide, hence the system will be an asset in expanding our understanding of the threshold.
Original languageEnglish
JournalThe Astronomical Journal
Volume154
Issue number6
Pages (from-to)266
ISSN0004-6256
DOIs
StatePublished - 1 Dec 2017
Externally publishedYes

    Research areas

  • planets and satellites: detection, stars: individual: GJ 9827, K2-135

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