Validation of up to seven TESS planet candidates through multi-colour transit photometry using MuSCAT2 data
Journal article, 2024
The TESS mission searches for transiting exoplanets by monitoring the brightness of hundreds of thousands of stars across the entire sky. M-type planet hosts are ideal targets for this mission due to their smaller size and cooler temperatures, which makes it easier to detect smaller planets near or within their habitable zones. Additionally, M dwarfs have a smaller contrast ratio between the planet and the star, making it easier to measure the planet's properties accurately. Here, we report the validation analysis of 13 TESS exoplanet candidates orbiting around M dwarfs. We studied the nature of these candidates through a multi-colour transit photometry transit analysis using several ground-based instruments (MuSCAT2, MuSCAT3, and LCO-SINISTRO), high-spatial resolution observations, and TESS light curves. We present the validation of five new planetary systems: TOI-1883b, TOI-2274b, TOI-2768b, TOI-4438b, and TOI-5319b, along with compelling evidence of a planetary nature for TOIs 2781b and 5486b. We also present an empirical definition for the Neptune desert boundaries. The remaining six systems could not be validated due to large true radius values overlapping with the brown dwarf regime or, alternatively, the presence of chromaticity in the MuSCAT2 light curves.
Methods: observational
Planets and satellites: general
Techniques: photometric
Planets and satellites: detection
Author
A. Peláez-Torres
University of La Laguna
Instituto de Astrofísica de Canarias
Institute of Astrophysics of Andalusia (IAA)
E. Esparza-Borges
University of La Laguna
Instituto de Astrofísica de Canarias
Enric Palle
University of La Laguna
Instituto de Astrofísica de Canarias
H. Parviainen
University of La Laguna
Instituto de Astrofísica de Canarias
F. Murgas
University of La Laguna
Instituto de Astrofísica de Canarias
Giuseppe Morello
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Institute of Astrophysics of Andalusia (IAA)
Instituto de Astrofísica de Canarias
M. Zapatero-Osorio
Centro de Astrobiologia (CAB)
Judith Korth
Lund University
Norio Narita
Instituto de Astrofísica de Canarias
National Institutes of Natural Sciences
University of Tokyo
A. Fukui
Instituto de Astrofísica de Canarias
University of Tokyo
Ilaria Carleo
Istituto nazionale di astrofisica (INAF)
Instituto de Astrofísica de Canarias
R. Luque
University of Chicago
N. Abreu Garcia
University of La Laguna
Instituto de Astrofísica de Canarias
Khalid Barkaoui
University of Liège
Instituto de Astrofísica de Canarias
Massachusetts Institute of Technology (MIT)
A. W. Boyle
National Aeronautics and Space Administration (NASA)
V. J. S. Bejar
Instituto de Astrofísica de Canarias
University of La Laguna
Yéssica Calatayud-Borras
Instituto de Astrofísica de Canarias
University of La Laguna
D. V. Cheryasov
Moscow State University
Jessie L. Christiansen
National Aeronautics and Space Administration (NASA)
D. R. Ciardi
National Aeronautics and Space Administration (NASA)
Gareb Enoc
University of La Laguna
Instituto de Astrofísica de Canarias
Zahra Essack
Massachusetts Institute of Technology (MIT)
Izuru Fukuda
University of Tokyo
G. Furész
Massachusetts Institute of Technology (MIT)
D. Galán
Instituto de Astrofísica de Canarias
University of La Laguna
S. Geraldía-González
University of La Laguna
Instituto de Astrofísica de Canarias
S. Giacalone
University of California
H. Gill
University of California
Erica J. Gonzales
University of California
Y. Hayashi
University of Tokyo
Kai Ikuta
University of Tokyo
K. Isogai
University of Tokyo
T. Kagetani
University of Tokyo
Yugo Kawai
University of Tokyo
Kiyoe Kawauchi
University of Tokyo
College of Life Sciences
P. Klagyvik
Freie Universität Berlin
T. Kodama
Nobuhiko Kusakabe
National Institutes of Natural Sciences
National Astronomical Observatory of Japan
A. Laza-Ramos
Universitat de Valencia
Jerome P. De Leon
University of Tokyo
J.H. Livingston
The Graduate University for Advanced Studies (SOKENDAI)
National Astronomical Observatory of Japan
National Institutes of Natural Sciences
M. B. Lund
National Aeronautics and Space Administration (NASA)
A. Madrigal-Aguado
Instituto de Astrofísica de Canarias
P. Meni
Instituto de Astrofísica de Canarias
M. Mori
University of Tokyo
S. Muñoz Torres
Instituto de Astrofísica de Canarias
University of La Laguna
J. Orell-Miquel
Instituto de Astrofísica de Canarias
University of La Laguna
M. Puig
Institute of Astrophysics of Andalusia (IAA)
George R. Ricker
Massachusetts Institute of Technology (MIT)
M. Sánchez-Benavente
Instituto de Astrofísica de Canarias
University of La Laguna
A. B. Savel
College of Computer, Mathematical, & Natural Sciences
Joshua E. Schlieder
NASA Goddard Space Flight Center
R. Schwarz
Harvard-Smithsonian Center for Astrophysics
Ramotholo Sefako
South African Astronomical Observatory
Paula Sosa-Guillén
Instituto de Astrofísica de Canarias
University of La Laguna
M. Stangret
Istituto nazionale di astrofisica (INAF)
C. Stockdale
Hazelwood Observatory
Motohide Tamura
University of Tokyo
National Astronomical Observatory of Japan
National Institutes of Natural Sciences
Y. Terada
J. D. Twicken
NASA Ames Research Center
SETI Institute
Noriharu Watanabe
University of Tokyo
J. N. Winn
Princeton University
S. G. Zheltoukhov
Moscow State University
C. Ziegler
Stephen F. Austin State University
Y. Zou
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 690 A62Subject Categories (SSIF 2011)
Meteorology and Atmospheric Sciences
Astronomy, Astrophysics and Cosmology
DOI
10.1051/0004-6361/202347251