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TOI-132 b: A short-period planet in the Neptune desert transiting a $V=11.3$ G-type star | | Matías R. Díaz
; James S. Jenkins
; Davide Gandolfi
; Eric D. Lopez
; Maritza G. Soto
; Pía Cortés-Zuleta
; Zaira M. Berdiñas
; Keivan G. Stassun
; Karen A. Collins
; José I. Vines
; Carl Ziegler
; Malcolm Fridlund
; Eric J. N. Jensen
; Felipe Murgas
; Alexandre Santerne
; Paul A. Wilson
; Massimiliano Esposito
; Artie P. Hatzes
; Marshall C. Johnson
; Kristine W. F. Lam
; John H. Livingston
; Vincent Van Eylen
; Norio Narita
; César Briceño
; Kevin I. Collins
; Szilard Csizmadia
; Michael Fausnaugh
; Tianjun Gan
; Iska Georgieva
; Ana Glidden
; Jon M. Jenkins
; David W. Latham
; Nicholas M. Law
; Andrew W. Mann
; Savita Mathur
; Ismael Mireles
; Robert Morris
; Enric Pallé
; Carina M. Persson
; Stephen Rinehart
; Mark E. Rose
; Sara Seager
; Jeffrey C. Smith
; Thiam-Guan Tan
; Andrei Tokovinin
; Andrew Vanderburg
; Roland Vanderspek
; Daniel A. Yahalomi
; | | Date: |
5 Nov 2019 | | Abstract: | The Neptune desert is a feature seen in the radius-mass-period plane, whereby
a notable dearth of short period, Neptune-like planets is found. Here we report
the ess, discovery of a new short-period planet in the Neptune desert,
orbiting the G-type dwarf TYC,8003-1117-1 (TOI-132). {it TESS} photometry
shows transit-like dips at the level of $sim$1400 ppm occurring every
$sim$2.11 days. High-precision radial velocity follow-up with HARPS confirmed
the planetary nature of the transit signal and provided a semi-amplitude radial
velocity variation of $sim$11.5 m s$^{-1}$, which, when combined with the
stellar mass of $0.97pm0.06$ $M_{odot}$, provides a planetary mass of
22.83$^{+1.81}_{-1.80}$ $M_{oplus}$. Modeling the {it TESS} high-quality
light curve returns a planet radius of 3.43$^{+0.13}_{-0.14}$ $R_{oplus}$, and
therefore the planet bulk density is found to be 3.11$^{+0.44}_{-0.450}$ 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$^{+1.2}_{-2.3}$\%. TOI-132 b is a {it 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
the Neptune desert. | | Source: | arXiv, 1911.2012 | | Services: | Forum | Review | PDF | Favorites | |
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