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
planets and satellites: detection
techniques: photometric
Author
E. Knudstrup
Aarhus University
Nordic Optical Telescope
D. Gandolfi
University of Turin
G. Nowak
Instituto de Astrofísica de Canarias
University of La Laguna
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
E. Furlan
California Institute of Technology (Caltech)
J. Livingston
The Graduate University for Advanced Studies (SOKENDAI)
National Astronomical Observatory of Japan
Astrobiology Center, Japan
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
Astrobiology Center, Japan
University of Tokyo
Instituto de Astrofísica de Canarias
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
National Astronomical Observatory of Japan
Astrobiology Center, 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
University of California at Santa Cruz
SETI Institute
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
NASA Ames Research Center
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
NASA Ames Research Center
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
Instituto de Astrofísica de Canarias
University of La Laguna
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
NASA Goddard Space Flight Center
S. Seager
Massachusetts Institute of Technology (MIT)
A. M. S. Smith
German Aerospace Center (DLR)
P. Tenenbaum
NASA Ames Research Center
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
Subatomic Physics
Astronomy, Astrophysics and Cosmology
DOI
10.1093/mnras/stac3684