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Two Warm Super-Earths Transiting the Nearby M Dwarf TOI-2095

Authors :
Elisa V. Quintana
Emily A. Gilbert
Thomas Barclay
Michele L. Silverstein
Joshua E. Schlieder
Ryan Cloutier
Samuel N. Quinn
Joseph E. Rodriguez
Andrew Vanderburg
Benjamin J. Hord
Dana R. Louie
Colby Ostberg
Stephen R. Kane
Kelsey Hoffman
Jason F. Rowe
Giada N. Arney
Prabal Saxena
Taran Richardson
Matthew S. Clement
Nicholas M. Kartvedt
Fred C. Adams
Marcus Alfred
Travis Berger
Allyson Bieryla
Paul Bonney
Patricia Boyd
Charles Cadieux
Douglas Caldwell
David R. Ciardi
David Charbonneau
Karen A. Collins
Knicole D. Colón
Dennis M. Conti
Mario Di Sora
Shawn Domagal-Goldman
Jessie Dotson
Thomas Fauchez
Erica J. Gonzales
Maximilian N. Günther
Christina Hedges
Giovanni Isopi
Erika Kohler
Ravi Kopparapu
Veselin B. Kostov
Jeffrey A. Larsen
Eric Lopez
Franco Mallia
Avi Mandell
Susan E. Mullally
Rishi R. Paudel
Brian P. Powell
George R. Ricker
Boris S. Safonov
Richard P. Schwarz
Ramotholo Sefako
Keivan G. Stassun
Robert Wilson
Joshua N. Winn
Roland K. Vanderspek
Source :
The Astronomical Journal, Vol 166, Iss 5, p 195 (2023)
Publication Year :
2023
Publisher :
IOP Publishing, 2023.

Abstract

We report the detection and validation of two planets orbiting TOI-2095 (TIC 235678745). The host star is a 3700 K M1V dwarf with a high proper motion. The star lies at a distance of 42 pc in a sparsely populated portion of the sky and is bright in the infrared ( K = 9). With data from 24 sectors of observation during Cycles 2 and 4 of the Transiting Exoplanet Survey Satellite, TOI-2095 exhibits two sets of transits associated with super-Earth-sized planets. The planets have orbital periods of 17.7 days and 28.2 days and radii of 1.30 R _⊕ and 1.39 R _⊕ , respectively. Archival data, preliminary follow-up observations, and vetting analyses support the planetary interpretation of the detected transit signals. The pair of planets have estimated equilibrium temperatures of approximately 400 K, with stellar insolations of 3.23 and 1.73 S _⊕ , placing them in the Venus zone. The planets also lie in a radius regime signaling the transition between rock-dominated and volatile-rich compositions. They are thus prime targets for follow-up mass measurements to better understand the properties of warm, transition-radius planets. The relatively long orbital periods of these two planets provide crucial data that can help shed light on the processes that shape the composition of small planets orbiting M dwarfs.

Subjects

Subjects :
Exoplanets
M stars
Astronomy
QB1-991

Details

Language :
English
ISSN :
15383881
Volume :
166
Issue :
5
Database :
Directory of Open Access Journals
Journal :
The Astronomical Journal
Publication Type :
Academic Journal
Accession number :
edsdoj.14c5c33fc0a408f8395001e7f73b40b
Document Type :
article
Full Text :
https://doi.org/10.3847/1538-3881/acfa9f