A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs Color validation of TOI-4479b and TOI-2081b
Journal article, 2022

Aims.
We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b and TOI-2081b.
Methods.
We jointly analyzed space (TESS mission) and ground-based (MuSCAT2, MuSCAT3 and SINISTRO instruments) light curves using our multicolor photometry transit analysis pipeline. This allowed us to compute contamination limits for both candidates and validate them as planet-sized companions. Results.
We found TOI-4479b to be a sub-Neptune-sized planet (R-p = 2.82(-0.63)(+0.65) R-circle plus) and TOI-2081b to be a super-Earth-sized planet (R-p = 2.04(-0.54)(+0.50) R-circle plus). Furthermore, we obtained that TOI-4479b, with a short orbital period of 1.15890(-0.00001)(+0.00002) days, lies within the Neptune desert and is in fact the largest nearly ultra-short period planet around an M dwarf known to date.
Conclusions.
These results make TOI-4479b rare among the currently known exoplanet population of M dwarf stars and an especially interesting target for spectroscopic follow-up and future studies of planet formation and evolution.

detection

planets and satellites

planets and satellites

planets and satellites

observational

individual

photometric

methods

TOI-4479b

planets and satellites

techniques

general

individual

TOI-2081b

Author

E. Esparza-Borges

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

E. Palle

Instituto de Astrofísica de Canarias

University of La Laguna

A. Maas

Heidelberg University

Giuseppe Morello

Instituto de Astrofísica de Canarias

University of La Laguna

M. R. Zapatero-Osorio

Spanish National Research Council (CSIC)

K. Barkaoui

University of Liège

Massachusetts Institute of Technology (MIT)

Instituto de Astrofísica de Canarias

N. Narita

University of Tokyo

Astrobiology Center, Japan

Instituto de Astrofísica de Canarias

A. Fukui

University of Tokyo

Instituto de Astrofísica de Canarias

N. Casasayas-Barris

Leiden University

M. Oshagh

University of La Laguna

Instituto de Astrofísica de Canarias

N. Crouzet

Leiden University

D. Galan

University of La Laguna

G. E. Fernandez

Instituto de Astrofísica de Canarias

T. Kagetani

University of Tokyo

K. Kawauchi

University of La Laguna

Instituto de Astrofísica de Canarias

T. Kodama

University of Tokyo

Judith Korth

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

N. Kusakabe

National Astronomical Observatory of Japan

Astrobiology Center, Japan

A. Laza-Ramos

Instituto de Astrofísica de Canarias

R. Luque

Spanish National Research Council (CSIC)

J. Livingston

University of Tokyo

National Astronomical Observatory of Japan

Astrobiology Center, Japan

A. Madrigal-Aguado

Instituto de Astrofísica de Canarias

M. Mori

University of Tokyo

J. Orell-Miquel

University of La Laguna

Instituto de Astrofísica de Canarias

M. Puig-Subira

Instituto de Astrofísica de Canarias

M. Stangret

University of La Laguna

Instituto de Astrofísica de Canarias

Y. Terada

National Taiwan University

Academia Sinica

N. Watanabe

University of Tokyo

Y. Zou

University of Tokyo

A. Baliga Savel

University of Maryland

A. A. Belinski

Moscow State University

K. Collins

Harvard-Smithsonian Center for Astrophysics

C. D. Dressing

University of California at Berkeley

S. Giacalone

University of California at Berkeley

H. Gill

University of California at Berkeley

Goliguzova

Moscow State University

M. Ikoma

National Astronomical Observatory of Japan

J. M. Jenkins

National Aeronautics and Space Administration (NASA)

M. Tamura

University of Tokyo

National Astronomical Observatory of Japan

Astrobiology Center, Japan

J. D. Twicken

National Aeronautics and Space Administration (NASA)

SETI Institute

G. R. Ricker

Massachusetts Institute of Technology (MIT)

R. P. Schwarz

Patashnick Voorheesville Observatory

S. Seager

Massachusetts Institute of Technology (MIT)

A. Shporer

Massachusetts Institute of Technology (MIT)

R. Vanderspek

Massachusetts Institute of Technology (MIT)

J. Winn

Princeton University

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 666 A10

Subject Categories (SSIF 2011)

Aerospace Engineering

Astronomy, Astrophysics and Cosmology

Other Physics Topics

DOI

10.1051/0004-6361/202243731

More information

Latest update

3/18/2025