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.
Planets and satellites: general
Techniques: photometric
Planets and satellites: detection
Methods: observational
Author
A. Peláez-Torres
University of La Laguna
Institute of Astrophysics of Andalusia (IAA)
Instituto de Astrofísica de Canarias
E. Esparza-Borges
University of La Laguna
Instituto de Astrofísica de Canarias
Enric Palle
Instituto de Astrofísica de Canarias
University of La Laguna
H. Parviainen
Instituto de Astrofísica de Canarias
University of La Laguna
F. Murgas
Instituto de Astrofísica de Canarias
University of La Laguna
Giuseppe Morello
Institute of Astrophysics of Andalusia (IAA)
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Instituto de Astrofísica de Canarias
M. Zapatero-Osorio
Centro de Astrobiologia (CAB)
Judith Korth
Lund University
Norio Narita
University of Tokyo
Instituto de Astrofísica de Canarias
National Institutes of Natural Sciences
A. Fukui
University of Tokyo
Instituto de Astrofísica de Canarias
Ilaria Carleo
Istituto nazionale di astrofisica (INAF)
Instituto de Astrofísica de Canarias
R. Luque
University of Chicago
N. Abreu Garcia
Instituto de Astrofísica de Canarias
University of La Laguna
Khalid Barkaoui
University of Liège
Massachusetts Institute of Technology (MIT)
Instituto de Astrofísica de Canarias
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
Instituto de Astrofísica de Canarias
University of La Laguna
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
Instituto de Astrofísica de Canarias
University of La Laguna
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
College of Life Sciences
University of Tokyo
P. Klagyvik
Freie Universität Berlin
T. Kodama
Nobuhiko Kusakabe
National Astronomical Observatory of Japan
National Institutes of Natural Sciences
A. Laza-Ramos
Universitat de Valencia
Jerome P. De Leon
University of Tokyo
J.H. Livingston
National Astronomical Observatory of Japan
National Institutes of Natural Sciences
The Graduate University for Advanced Studies (SOKENDAI)
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
University of La Laguna
Instituto de Astrofísica de Canarias
M. Puig
Institute of Astrophysics of Andalusia (IAA)
George R. Ricker
Massachusetts Institute of Technology (MIT)
M. Sánchez-Benavente
University of La Laguna
Instituto de Astrofísica de Canarias
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
University of La Laguna
Instituto de Astrofísica de Canarias
M. Stangret
Istituto nazionale di astrofisica (INAF)
C. Stockdale
Hazelwood Observatory
Motohide Tamura
National Institutes of Natural Sciences
National Astronomical Observatory of Japan
University of Tokyo
Y. Terada
J. D. Twicken
SETI Institute
NASA Ames Research Center
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
Meteorology and Atmospheric Sciences
Astronomy, Astrophysics and Cosmology
DOI
10.1051/0004-6361/202347251