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 1 973-985

Subject Categories

Astronomy, Astrophysics and Cosmology

Roots

Basic sciences

DOI

10.1093/mnras/staa277

More information

Latest update

9/30/2020