TESS and HARPS reveal two sub-Neptunes around TOI 1062
Journal article, 2021

The Transiting Exoplanet Survey Satellite (TESS) mission was designed to perform an all-sky search of planets around bright and nearby stars. Here we report the discovery of two sub-Neptunes orbiting around TOI 1062 (TIC 299799658), a V = 10.25 G9V star observed in the TESS Sectors 1, 13, 27, and 28. We use precise radial velocity observations from HARPS to confirm and characterize these two planets. TOI 1062b has a radius of 2.265 (+0.096)(-0.091) R-circle plus, a mass of 10.15 +/- 0.8 M-circle plus, and an orbital period of 4.1130 +/- 0.0015 days. The second planet is not transiting, has a minimum mass of 9.78 (+1.26)(-1.18) M-circle plus and is near the 2:1 mean motion resonance with the innermost planet with an orbital period of 7.972 (+0.018)(-0.024) days. We performed a dynamical analysis to explore the proximity of the system to this resonance, and to attempt further constraining the orbital parameters. The transiting planet has a mean density of 4.85(-0.74)(+0.84) g cm(-3) and an analysis of its internal structure reveals that it is expected to have a small volatile envelope accounting for 0.35% of the mass at most. The star's brightness and the proximity of the inner planet to what is know as the radius gap make it an interesting candidate for transmission spectroscopy, which could further constrain the composition and internal structure of TOI 1062b.

planets and satellites: composition

planets and satellites: detection

planets and satellites: general

Author

J. F. Otegi

University of Zürich

University of Geneva

F. Bouchy

University of Geneva

R. Helled

University of Zürich

D. J. Armstrong

The University of Warwick

M. Stalport

University of Geneva

A. Psaridi

University of Geneva

J-B Delisle

University of Geneva

K. G. Stassun

Vanderbilt University

E. Delgado-Mena

University of Porto

N. C. Santos

University of Porto

N. C. Hara

University of Geneva

K. Collins

Harvard-Smithsonian Center for Astrophysics

S. Gandhi

The University of Warwick

C. Dorn

University of Zürich

M. Brogi

The University of Warwick

Malcolm Fridlund

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

H. P. Osborn

University of Bern

Massachusetts Institute of Technology (MIT)

S. Hoyer

Aix Marseille University

S. Udry

University of Geneva

S. Hojjatpanah

University of Porto

L. D. Nielsen

University of Geneva

X. Dumusque

University of Geneva

V Adibekyan

University of Porto

D. Conti

American Association of Variable Star Observers

R. Schwarz

Patashnick Voorheesville Observatory

G. Wang

Tsinghua International School

P. Figueira

European Southern Observatory Santiago

University of Porto

J. Lillo-Box

Spanish Astrobiology Center (INTA-CSIC)

A. Hadjigeorghiou

The University of Warwick

D. Bayliss

The University of Warwick

P. A. Strom

The University of Warwick

S. G. Sousa

University of Porto

D. Barrado

Spanish Astrobiology Center (INTA-CSIC)

A. Osborn

The University of Warwick

S. C. C. Barros

University of Porto

D. J. A. Brown

The University of Warwick

J. D. Eastman

Harvard-Smithsonian Center for Astrophysics

D. R. Ciardi

California Institute of Technology (Caltech)

A. Vanderburg

The University of Texas at Austin

R. F. Goeke

Massachusetts Institute of Technology (MIT)

N. M. Guerrero

Massachusetts Institute of Technology (MIT)

P. T. Boyd

NASA Goddard Space Flight Center

D. A. Caldwell

NASA Ames Research Center

SETI Institute

C. E. Henze

NASA Ames Research Center

B. McLean

Space Telescope Science Institute (STScI)

G. Ricker

Massachusetts Institute of Technology (MIT)

R. Vanderspek

Massachusetts Institute of Technology (MIT)

D. W. Latham

Harvard-Smithsonian Center for Astrophysics

S. Seager

Massachusetts Institute of Technology (MIT)

J. Winn

Princeton University

J. M. Jenkins

NASA Ames Research Center

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 653 A105

Subject Categories

Astronomy, Astrophysics and Cosmology

Other Physics Topics

Condensed Matter Physics

DOI

10.1051/0004-6361/202040247

More information

Latest update

10/7/2021