A hot sub-Neptune in the desert and a temperate super-Earth around faint M dwarfs Color validation of TOI-4479b and TOI-2081b
Artikel i vetenskaplig tidskrift, 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

individual

photometric

individual

planets and satellites

TOI-2081b

general

planets and satellites

TOI-4479b

observational

techniques

planets and satellites

methods

planets and satellites

Författare

E. Esparza-Borges

Universidad de la Laguna

Instituto de Astrofísica de Canarias

H. Parviainen

Universidad de la Laguna

Instituto de Astrofísica de Canarias

F. Murgas

Universidad de la Laguna

Instituto de Astrofísica de Canarias

E. Palle

Universidad de la Laguna

Instituto de Astrofísica de Canarias

A. Maas

Universität Heidelberg

G. Morello

Universidad de la Laguna

Instituto de Astrofísica de Canarias

M. R. Zapatero-Osorio

Centro de Astrobiología (INTA-CSIC)

K. Barkaoui

Massachusetts Institute of Technology (MIT)

Instituto de Astrofísica de Canarias

Universite de Liège

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

Universiteit Leiden

M. Oshagh

Universidad de la Laguna

Instituto de Astrofísica de Canarias

N. Crouzet

Universiteit Leiden

D. Galan

Universidad de la Laguna

G. E. Fernandez

Instituto de Astrofísica de Canarias

T. Kagetani

University of Tokyo

K. Kawauchi

Universidad de la Laguna

Instituto de Astrofísica de Canarias

T. Kodama

University of Tokyo

Judith Korth

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

N. Kusakabe

National Astronomical Observatory of Japan

Astrobiology Center, Japan

A. Laza-Ramos

Instituto de Astrofísica de Canarias

R. Luque

Instituto de Astrofisica de Andalucía (IAA)

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

Universidad de la Laguna

Instituto de Astrofísica de Canarias

M. Puig-Subira

Instituto de Astrofísica de Canarias

M. Stangret

Instituto de Astrofísica de Canarias

Universidad de la Laguna

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

NASA Ames Research Center

M. Tamura

Astrobiology Center, Japan

University of Tokyo

National Astronomical Observatory of Japan

J. D. Twicken

NASA Ames Research Center

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

Ämneskategorier

Rymd- och flygteknik

Astronomi, astrofysik och kosmologi

Annan fysik

DOI

10.1051/0004-6361/202243731

Mer information

Senast uppdaterat

2022-10-26