TOI-132 b: A short-period planet in the Neptune desert transiting a V=11.3 G-type star
Artikel i vetenskaplig tidskrift, 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: photometric
techniques: radial velocities
planetary systems
planets and satellites: fundamental parameters
Författare
Matias R. Diaz
Universidad de Chile (UCH)
James S. Jenkins
Universidad de Chile (UCH)
Davide Gandolfi
Universita degli Studi di Torino
Eric D. Lopez
NASA Goddard Space Flight Center
Maritza G. Soto
Queen Mary University of London
Pia Cortes-Zuleta
Universidad de Chile (UCH)
Zaira M. Berdinas
Universidad de Chile (UCH)
Keivan G. Stassun
Vanderbilt University
Fisk University
Karen A. Collins
Harvard-Smithsonian Center for Astrophysics
Vines
Universidad de Chile (UCH)
Carl Ziegler
University of Toronto
Malcolm Fridlund
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Eric L. N. Jensen
Swarthmore College
Felipe Murgas
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Alexandre Santerne
Aix-Marseille Université
Paul A. Wilson
The University of Warwick
Massimiliano Esposito
Thüringer Landessternwarte Tautenburg
Artie P. Hatzes
Thüringer Landessternwarte Tautenburg
Marshall C. Johnson
Las Cumbres Observatory Global Telescope Network
Kristine W. F. Lam
Technische Universität Berlin
John H. Livingston
University of Tokyo
Vincent Van Eylen
Princeton University
University College London (UCL)
Norio Narita
Centro de Astrobiología (INTA-CSIC)
National Astronomical Observatory of Japan
Instituto de Astrofísica de Canarias
Japan Science and Technology Agency
Cesar Briceno
Cerro Tololo Inter American Observatory
Collins
George Mason University
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Michael Fausnaugh
Massachusetts Institute of Technology (MIT)
Tianjun Gan
Tsinghua University
Rafael A. Garcia
Université Paris-Saclay
Iskra Georgieva
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Ana Glidden
Massachusetts Institute of Technology (MIT)
Lucia Gonzalez-Cuesta
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Jon M. Jenkins
NASA Ames Research Center
David W. Latham
Harvard-Smithsonian Center for Astrophysics
Nicholas M. Law
The University of North Carolina System
Andrew W. Mann
The University of North Carolina System
Savita Mathur
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Ismael Mireles
Massachusetts Institute of Technology (MIT)
Robert Morris
SETI Institute
NASA Ames Research Center
Enric Palle
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Carina Persson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
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
SETI Institute
NASA Ames Research Center
Thiam-Guan Tan
Perth Exoplanet Survey Telescope
Andrei Tokovinin
Cerro Tololo Inter American Observatory
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 1 973-985Ämneskategorier
Astronomi, astrofysik och kosmologi
Fundament
Grundläggande vetenskaper
DOI
10.1093/mnras/staa277