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 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 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 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⊕. Modeling 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 the Neptune desert.

planets and satellites: fundamental parameters

and techniques

and techniques: photometric

methods

Astrophysics - Solar and Stellar Astrophysics

techniques: radial velocities

planets and satellites: detection

Planetary Systems

Astronomical instrumentation

Astrophysics - Earth and Planetary Astrophysics

Författare

M. R. Díaz

J. S. Jenkins

D. Gandolfi

E. D. Lopez

M. G. Soto

P. Cortés-Zuleta

Z. M. Berdiñas

K.G. Stassun

K. A. Collins

J. I. Vines

C. Ziegler

Malcolm Fridlund

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

E. L. N. Jensen

F. Murgas

A. Santerne

P. A. Wilson

E. Massimiliano

A. P. Hatzes

M. C. Johnson

K. W. F. Lam

J. H. Livingston

V. Van Eylen

N. Narita

C. Briceño

K. I. Collins

Sz. Csizmadia

M. Fausnaugh

G. Tianjun

R. A. García

Iskra Georgieva

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

A. Glidden

L. González-Cuesta

J. M. Jenkins

D. W. Latham

N. M. Law

A. W. Mann

S. Mathur

I. Mireles

R. Morris

E. Pallé

Carina Persson

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

G. Ricker

S. Rinehart

E. Mark

S. Seager

J. C. Smith

T. Thiam-Guan

A. Tokovinin

A. Vanderburg

R. Vanderspek

J. N. Winn

D. A. Yahalomi

Monthly Notices of the Royal Astronomical Society

0035-8711 (ISSN) 1365-2966 (eISSN)

Vol. 493 973-985

Exoplaneter från rymden - CHEOPS och PLATO

Rymdstyrelsen, 2017-01-01 -- 2022-12-31.

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

DOI

10.1093/mnras/staa277

Mer information

Skapat

2020-02-26