TESS and HARPS reveal two sub-Neptunes around TOI 1062
Artikel i vetenskaplig tidskrift, 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: general
planets and satellites: detection
planets and satellites: composition
Författare
J. F. Otegi
Universität Zürich
Université de Genève
F. Bouchy
Université de Genève
R. Helled
Universität Zürich
D. J. Armstrong
The University of Warwick
M. Stalport
Université de Genève
A. Psaridi
Université de Genève
J-B Delisle
Université de Genève
K. G. Stassun
Vanderbilt University
E. Delgado-Mena
Universidade do Porto
N. C. Santos
Universidade do Porto
N. C. Hara
Université de Genève
K. Collins
Harvard-Smithsonian Center for Astrophysics
S. Gandhi
The University of Warwick
C. Dorn
Universität Zürich
M. Brogi
The University of Warwick
Malcolm Fridlund
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
H. P. Osborn
Massachusetts Institute of Technology (MIT)
Universität Bern
S. Hoyer
Aix-Marseille Université
S. Udry
Université de Genève
S. Hojjatpanah
Universidade do Porto
L. D. Nielsen
Université de Genève
X. Dumusque
Université de Genève
V Adibekyan
Universidade do Porto
D. Conti
American Association of Variable Star Observers
R. Schwarz
Patashnick Voorheesville Observatory
G. Wang
Tsinghua International School
P. Figueira
Universidade do Porto
European Southern Observatory Santiago
J. Lillo-Box
Consejo Superior de Investigaciones Científicas (CSIC)
A. Hadjigeorghiou
The University of Warwick
D. Bayliss
The University of Warwick
P. A. Strom
The University of Warwick
S. G. Sousa
Universidade do Porto
D. Barrado
Consejo Superior de Investigaciones Científicas (CSIC)
A. Osborn
The University of Warwick
S. C. C. Barros
Universidade do 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
National Aeronautics and Space Administration (NASA)
D. A. Caldwell
SETI Institute
National Aeronautics and Space Administration (NASA)
C. E. Henze
National Aeronautics and Space Administration (NASA)
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
National Aeronautics and Space Administration (NASA)
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 653 A105Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Annan fysik
Den kondenserade materiens fysik
DOI
10.1051/0004-6361/202040247