Radial velocity confirmation of a hot super-Neptune discovered by TESS with a warm Saturn-mass companion
Journal article, 2023
We report the discovery and confirmation of the planetary system TOI-1288. This late G dwarf harbours two planets: TOI-1288 b and TOI-1288 c. We combine TESS space-borne and ground-based transit photometry with HARPS-N and HIRES high-precision Doppler measurements, which we use to constrain the masses of both planets in the system and the radius of planet b. TOI-1288 b has a period of 2.699835(-0.000003)(+0.000004) d, a radius of 5.24 +/- 0.09 R-circle plus, and a mass of 42 +/- 3 M-circle plus, making this planet a hot transiting super-Neptune situated right in the Neptunian desert. This desert refers to a paucity of Neptune-sized planets on short period orbits. Our 2.4-yr-long Doppler monitoring of TOI-1288 revealed the presence of a Saturn-mass planet on a moderately eccentric orbit (0.13(-0.09)(+0.07)) with a minimum mass of 84 +/- 7 M-circle plus and a period of 443(-13)(+11) d. The five sectors worth of TESS data do not cover our expected mid-transit time for TOI-1288 c, and we do not detect a transit for this planet in these sectors.
techniques: radial velocities
techniques: photometric
planets and satellites: detection
Author
E. Knudstrup
Aarhus University
Nordic Optical Telescope
D. Gandolfi
University of Turin
G. Nowak
University of La Laguna
Instituto de Astrofísica de Canarias
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
E. Furlan
California Institute of Technology (Caltech)
J. Livingston
National Astronomical Observatory of Japan
Astrobiology Center, Japan
The Graduate University for Advanced Studies (SOKENDAI)
E. Matthews
University of Geneva
M. S. Lundkvist
Aarhus University
M. L. Winther
Aarhus University
J. L. Rorsted
Aarhus University
S. H. Albrecht
Aarhus University
E. Goffo
Thüringer Landessternwarte Tautenburg
University of Turin
I Carleo
Instituto de Astrofísica de Canarias
H. J. Deeg
University of La Laguna
Instituto de Astrofísica de Canarias
K. A. Collins
Harvard-Smithsonian Center for Astrophysics
N. Narita
Instituto de Astrofísica de Canarias
Astrobiology Center, Japan
University of Tokyo
H. Isaacson
University of California at Berkeley
California Institute of Technology (Caltech)
S. Redfield
Wesleyan University
F. Dai
California Institute of Technology (Caltech)
T. Hirano
Astrobiology Center, Japan
National Astronomical Observatory of Japan
J. M. Akana Murphy
University of California at Santa Cruz
C. Beard
University of California at Irvine (UCI)
L. A. Buchhave
Technical University of Denmark (DTU)
S. Cary
Wellesley College
A. Chontos
Princeton University
I Crossfield
University of Kansas
W. D. Cochran
The University of Texas at Austin
D. Conti
American Association of Variable Star Observers
P. A. Dalba
SETI Institute
University of California at Santa Cruz
M. Esposito
Thüringer Landessternwarte Tautenburg
S. Fajardo-Acosta
California Institute of Technology (Caltech)
S. Giacalone
University of California at Berkeley
S. K. Grunblatt
Johns Hopkins University
P. Guerra
Albanyà Astronomical Observatory
A. P. Hatzes
Thüringer Landessternwarte Tautenburg
R. Holcomb
University of California at Irvine (UCI)
A. W. Howard
California Institute of Technology (Caltech)
D. Huber
University of Hawaii
J. M. Jenkins
National Aeronautics and Space Administration (NASA)
P. Kabath
Czech Academy of Sciences
S. Kane
University of California at Riverside
Judith Korth
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
K. W. F. Lam
German Aerospace Center (DLR)
Lester
National Aeronautics and Space Administration (NASA)
R. Matson
US Naval Observatory
K. K. McLeod
Wellesley College
J. Orell-Miquel
University of La Laguna
Instituto de Astrofísica de Canarias
F. Murgas
University of La Laguna
Instituto de Astrofísica de Canarias
E. Palle
University of La Laguna
Instituto de Astrofísica de Canarias
A. S. Polanski
University of Kansas
G. Ricker
Massachusetts Institute of Technology (MIT)
P. Robertson
University of California at Irvine (UCI)
R. Rubenzahl
California Institute of Technology (Caltech)
J. E. Schlieder
National Aeronautics and Space Administration (NASA)
S. Seager
Massachusetts Institute of Technology (MIT)
A. M. S. Smith
German Aerospace Center (DLR)
P. Tenenbaum
National Aeronautics and Space Administration (NASA)
SETI Institute
E. Turtelboom
University of California at Berkeley
R. Vanderspek
Massachusetts Institute of Technology (MIT)
L. Weiss
University of Notre Dame
J. Winn
Princeton University
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 519 4 5637-5655Subject Categories (SSIF 2011)
Subatomic Physics
Astronomy, Astrophysics and Cosmology
DOI
10.1093/mnras/stac3684