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 A105Subject Categories
Astronomy, Astrophysics and Cosmology
Other Physics Topics
Condensed Matter Physics
DOI
10.1051/0004-6361/202040247