The TOI-763 system: sub-Neptunes orbiting a Sun-like star

DOI PDF PDF 参考文献73件
  • M Fridlund
    Leiden Observatory, Leiden University, NL-2333 CA Leiden, The Netherlands
  • J Livingston
    Department of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ky, Tokyo 113-0033, Japan
  • D Gandolfi
    Dipartimento di Fisica, Universitate degli Studi di Torino, via Pietro Giuria 1, I-10125 Torino, Italy
  • C M Persson
    Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden
  • K W F Lam
    Center for Astronomy and Astrophysics, Technical University Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
  • K G Stassun
    Physics and Astronomy Department, Vanderbilt University, Nashville, TN 37235, USA
  • C Hellier
    Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
  • J Korth
    Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, Germany
  • A P Hatzes
    Thüringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany
  • L Malavolta
    Dipartimento di Fisica e Astronomia Galilei, Universitá di Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy
  • R Luque
    Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain
  • S Redfield
    Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA
  • E W Guenther
    Thüringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany
  • S Albrecht
    Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
  • O Barragan
    Sub-department of Astrophysics, Department of Physics, University of Oxford, Oxford OX1 3RH, UK
  • S Benatti
    INAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento, 1, I-90134 Palermo, Italy
  • L Bouma
    Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA
  • J Cabrera
    Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, D-12489 Berlin, Germany
  • W D Cochran
    Department of Astronomy and McDonald Observatory, University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA
  • S Csizmadia
    Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, D-12489 Berlin, Germany
  • F Dai
    Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA
  • H J Deeg
    Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain
  • M Esposito
    Thüringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany
  • I Georgieva
    Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden
  • S Grziwa
    Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, Germany
  • L González Cuesta
    Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain
  • T Hirano
    Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokio 152-8551, Japan
  • J M Jenkins
    NASA Ames Research Center, Moffet Field, CA 94035, USA
  • P Kabath
    Astronomical Institute, Czech Academy of Sciences, Fričova 298, CZ-25165 Ondřejov, Czech Republic
  • E Knudstrup
    Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
  • D W Latham
    Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
  • S Mathur
    Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain
  • S E Mullally
    Department of Aeronautics and Astronautics, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
  • N Narita
    Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain
  • G Nowak
    Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain
  • A O H Olofsson
    Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden
  • E Palle
    Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain
  • M Pätzold
    Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, Germany
  • E Pompei
    European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Casilla 19001, Santiago de Chile, Chile
  • H Rauer
    Center for Astronomy and Astrophysics, Technical University Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
  • G Ricker
    Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
  • F Rodler
    European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Casilla 19001, Santiago de Chile, Chile
  • S Seager
    Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
  • L M Serrano
    Dipartimento di Fisica, Universitate degli Studi di Torino, via Pietro Giuria 1, I-10125 Torino, Italy
  • A M S Smith
    Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, D-12489 Berlin, Germany
  • L Spina
    School of Physics and Astronomy, Monash University, VIC 3800, Australia
  • J Subjak
    Astronomical Institute, Czech Academy of Sciences, Fričova 298, CZ-25165 Ondřejov, Czech Republic
  • P Tenenbaum
    SETI Institute/NASA Ames Research Center, Moffet Field, CA 94035, USA
  • E B Ting
    NASA Ames Research Center, Moffet Field, CA 94035, USA
  • A Vanderburg
    Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
  • R Vanderspek
    Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
  • V Van Eylen
    Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK
  • S Villanueva
    Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
  • J N Winn
    Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA

抄録

<jats:title>ABSTRACT</jats:title> <jats:p>We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of Pb  =  5.6 d, a mass of Mb  =  9.8 ± 0.8 M⊕, and a radius of Rb  =  2.37 ± 0.10 R⊕. The second transiting planet, TOI-763 c, has an orbital period of Pc  =  12.3 d, a mass of Mc  =  9.3 ± 1.0 M⊕, and a radius of Rc  =  2.87 ± 0.11 R⊕. We find the outermost planet candidate to orbit the star with a period of ∼48 d. If confirmed as a planet, it would have a minimum mass of Md  =  9.5 ± 1.6 M⊕. We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.</jats:p>

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