TOI-132 b: A short-period planet in the Neptune desert transiting a V=11.3 G-type star
Journal article, 2020
The Neptune desert is a feature seen in the radius-period plane, whereby a notable dearth of short period, Neptune-like planets is found. Here, we report the Transiting Exoplanet Survey Satellite (TESS) discovery of a new short-period planet in the Neptune desert, orbiting the G-type dwarf TYC 8003-1117-1 (TOI-132). TESS photometry shows transit-like dips at the level of similar to 1400 ppm occurring every similar to 2.11 d. High-precision radial velocity follow-up with High Accuracy Radial Velocity Planet Searcher confirmed the planetary nature of the transit signal and provided a semi-amplitude radial velocity variation of 11.38(-0.85)(+0.84) m s(-1), which, when combined with the stellar mass of 0.97 +/- 0.06 M-circle dot, provides a planetary mass of 22.40(-1.92)(+1.90) M-circle plus. Modelling the TESS light curve returns a planet radius of 3.42(-0.14)(+0.13) R-circle plus , and therefore the planet bulk density is found to be 3.08(-0.46)(+0.44) g cm(-3). Planet structure models suggest that the bulk of the planet mass is in the form of a rocky core, with an atmospheric mass fraction of 4.3(-2.3)(+1.2) percent. TOI-132 b is a TESS Level 1 Science Requirement candidate, and therefore priority follow-up will allow the search for additional planets in the system, whilst helping to constrain low-mass planet formation and evolution models, particularly valuable for better understanding of the Neptune desert.
techniques: radial velocities
planets and satellites: fundamental parameters
planetary systems
techniques: photometric
Author
Matias R. Diaz
University of Chile (UCH)
James S. Jenkins
University of Chile (UCH)
Davide Gandolfi
University of Turin
Eric D. Lopez
NASA Goddard Space Flight Center
Maritza G. Soto
Queen Mary University of London
Pia Cortes-Zuleta
University of Chile (UCH)
Zaira M. Berdinas
University of Chile (UCH)
Keivan G. Stassun
Fisk University
Vanderbilt University
Karen A. Collins
Harvard-Smithsonian Center for Astrophysics
Vines
University of Chile (UCH)
Carl Ziegler
University of Toronto
Malcolm Fridlund
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics
Eric L. N. Jensen
Swarthmore College
Felipe Murgas
University of La Laguna
Instituto Astrofisico de Canarias
Alexandre Santerne
Aix Marseille University
Paul A. Wilson
The University of Warwick
Massimiliano Esposito
Thuringer Landessternwarte Lautenburg
Artie P. Hatzes
Thuringer Landessternwarte Lautenburg
Marshall C. Johnson
Las Cumbres Observ, 6740 Cortona Dr, Ste 102
Kristine W. F. Lam
Technische Universität Berlin
John H. Livingston
University of Tokyo
Vincent Van Eylen
University College London (UCL)
Princeton University
Norio Narita
Japan Science and Technology Agency
Instituto Astrofisico de Canarias
National Astronomical Observatory of Japan
Ctr Astrobiol CSIC INTA
Cesar Briceno
Cerro Tololo Interamer Observ
Collins
George Mason University
Szilard Csizmadia
German Aerospace Center (DLR)
Michael Fausnaugh
Massachusetts Institute of Technology (MIT)
Tianjun Gan
Tsinghua University
Rafael A. Garcia
University Paris-Saclay
Iskra Georgieva
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics
Ana Glidden
Massachusetts Institute of Technology (MIT)
Lucia Gonzalez-Cuesta
University of La Laguna
Instituto Astrofisico de Canarias
Jon M. Jenkins
NASA Ames Research Center
David W. Latham
Harvard-Smithsonian Center for Astrophysics
Nicholas M. Law
The University of North Carolina at Chapel Hill
Andrew W. Mann
The University of North Carolina at Chapel Hill
Savita Mathur
Instituto Astrofisico de Canarias
University of La Laguna
Ismael Mireles
Massachusetts Institute of Technology (MIT)
Robert Morris
NASA Ames Research Center
SETI Institute
Enric Palle
University of La Laguna
Instituto Astrofisico de Canarias
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics
George Ricker
Massachusetts Institute of Technology (MIT)
Stephen Rinehart
NASA Goddard Space Flight Center
Mark E. Rose
NASA Ames Research Center
Sara Seager
Massachusetts Institute of Technology (MIT)
Jeffrey C. Smith
NASA Ames Research Center
SETI Institute
Thiam-Guan Tan
Perth Exoplanet Survey Telescope
Andrei Tokovinin
Cerro Tololo Interamer Observ
Andrew Vanderburg
The University of Texas at Austin
Roland Vanderspek
Massachusetts Institute of Technology (MIT)
Joshua N. Winn
Princeton University
Daniel A. Yahalomi
Harvard-Smithsonian Center for Astrophysics
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 493 1 973-985Subject Categories
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
DOI
10.1093/mnras/staa277