TOI-132 b: A short-period planet in the Neptune desert transiting a V = 11.3 G-type star<SUP>★</SUP> - Archive ouverte HAL Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2020

TOI-132 b: A short-period planet in the Neptune desert transiting a V = 11.3 G-type star

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Matías R. Díaz
  • Function : Author
James S. Jenkins
  • Function : Author
Davide Gandolfi
  • Function : Author
Eric D. Lopez
  • Function : Author
Maritza G. Soto
  • Function : Author
Pía Cortés-Zuleta
Zaira M. Berdiñas
  • Function : Author
Keivan G. Stassun
  • Function : Author
Karen A. Collins
  • Function : Author
José I. Vines
  • Function : Author
Carl Ziegler
Malcom Fridlund
  • Function : Author
Eric L. N. Jensen
  • Function : Author
Felipe Murgas
  • Function : Author
Paul A. Wilson
  • Function : Author
Massimiliano Esposito
  • Function : Author
Artie P. Hatzes
  • Function : Author
Marshall C. Johnson
  • Function : Author
Kristine W. F. Lam
  • Function : Author
John H. Livingston
  • Function : Author
Vincent van Eylen
Norio Narita
  • Function : Author
Cesar Briceño
  • Function : Author
Kevin I. Collins
  • Function : Author
Szilárd Csizmadia
  • Function : Author
Michael Fausnaugh
  • Function : Author
Tianjun Gan
Rafael A. García
  • Function : Author
Iska Georgieva
  • Function : Author
Ana Glidden
  • Function : Author
Lucía González-Cuesta
  • Function : Author
Jon M. Jenkins
  • Function : Author
David W. Latham
  • Function : Author
Nicholas M. Law
  • Function : Author
Andrew W. Mann
  • Function : Author
Savita Mathur
  • Function : Author
Ismael Mireles
Robert Morris
  • Function : Author
Enric Pallé
  • Function : Author
Carina M. Persson
  • Function : Author
George Ricker
Stephen Rinehart
  • Function : Author
Mark E. Rose
  • Function : Author
Sara Seager
Jeffrey C. Smith
  • Function : Author
Thiam-Guan Tan
Andrei Tokovinin
  • Function : Author
Andrew Vanderburg
Roland Vanderspek
Joshua N. Winn
  • Function : Author
Daniel A. Yahalomi
  • Function : Author

Abstract

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 ∼1400 ppm occurring every ∼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 $^{+0.84}_{-0.85}$ m s-1, which, when combined with the stellar mass of 0.97 ± 0.06 M, provides a planetary mass of 22.40 $^{+1.90}_{-1.92}$ M. Modelling the TESS light curve returns a planet radius of 3.42 $^{+0.13}_{-0.14}$ R, and therefore the planet bulk density is found to be 3.08 $^{+0.44}_{-0.46}$ 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 $^{+1.2}_{-2.3}$ per cent. 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.
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Dates and versions

insu-03667118 , version 1 (13-05-2022)

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Matías R. Díaz, James S. Jenkins, Davide Gandolfi, Eric D. Lopez, Maritza G. Soto, et al.. TOI-132 b: A short-period planet in the Neptune desert transiting a V = 11.3 G-type star. Monthly Notices of the Royal Astronomical Society, 2020, 493, pp.973-985. ⟨10.1093/mnras/staa277⟩. ⟨insu-03667118⟩
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