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TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey Satellite

Authors :
Rafael Brahm
Louise D. Nielsen
Robert A. Wittenmyer
Songhu Wang
Joseph E. Rodriguez
Néstor Espinoza Perez
Matías I. Jones
Andrés Jordán
Thomas Henning
Melissa J. Hobson
Diana Kossakowski
Felipe Rojas
Paula Sarkis
Martin Schlecker
Trifon Trifonov
Sahar Shahaf
George R Ricker
Roland Vanderspek
David W. Latham
Sara Seager
Joshua N. Winn
Jon M. Jenkins
Brett C. Addison
Gáspár Á. Bakos
Waqas Bhatti
Daniel Bayliss
Perry Berlind
Allyson Bieryla
Francois Bouchy
Brendan P. Bowler
César Briceño
Timothy M. Brown
Edward M. Bryant
Douglas A. Caldwell
David Charbonneau
Karen A. Collins
Allen B. Davis
Gilbert A. Esquerdo
Benjamin J. Fulton
Natalia M. Guerrero
Christopher E. Henze
Aleisha Hogan
Jonathan Horner
Chelsea X. Huang
Jonathan Irwin
Stephen R. Kane
John Kielkopf
Andrew W. Mann
Tsevi Mazeh
James McCormac
Curtis McCully
Matthew W. Mengel
Ismael Mireles
Jack Okumura
Peter Plavchan
Samuel N. Quinn
Markus Rabus
Sophie Saesen
Joshua E. Schlieder
Damien Segransan
Bernie Shiao
Avi Shporer
Robert J. Siverd
Keivan G. Stassun
Vincent Suc
Thiam-Guan Tan
Pascal Torres
Chris G. Tinney
Stephane Udry
Leonardo Vanzi
Michael Vezie
Jose I. Vines
Maja Vuckovic
Duncan J. Wright
Daniel Yahalomi
Abner Zapata
Hui Zhang
Carl Ziegler
Source :
The Astronomical Journal. 160(5)
Publication Year :
2020
Publisher :
United States: NASA Center for Aerospace Information (CASI), 2020.

Abstract

We present the discovery of two new 10 day period giant planets from the Transiting Exoplanet Survey Satellite mission, whose masses were precisely determined using a wide diversity of ground-based facilities. TOI-481 b and TOI-892 b have similar radii (0.99 ± 0.01 R(J) and 1.07 ± 0.02 R(J), respectively), and orbital periods (10.3311 days and 10.6266 days, respectively), but significantly different masses (1.53 ± 0.03 M(J) versus 0.95 ± 0.07 M(J), respectively). Both planets orbit metal-rich stars ([Fe/HG] = +0.26 ± 0.05 dex and [Fe/H] = +0.24 ± 0.05 for TOI-481 and TOI-892, respectively) but at different evolutionary stages. TOI-481 is a M(*) = 1.14 ± 0.02 Mꙩ, R(*) = 1.66 ± 0.02 Rꙩ G-type star (T(eff) = 5735 ± 72 K), that with an age of 6.7 Gyr, is in the turn-off point of the main sequence. TOI-892 on the other hand, is a F-type dwarf star (T(eff) = 6261 ± 80 K), which has a mass of M(*) = 1.28 ± 0.03 Mꙩ and a radius of R(*) = 1.39 ± 0.02 Rꙩ. TOI-481 b and TOI-892 b join the scarcely populated region of transiting gas giants with orbital periods longer than 10 days, which is important to constrain theories of the formation and structure of hot Jupiters.

Subjects

Subjects :
Astronomy
Astrophysics

Details

Language :
English
ISSN :
15384357 and 0004637X
Volume :
160
Issue :
5
Database :
NASA Technical Reports
Journal :
The Astronomical Journal
Notes :
985788
Publication Type :
Report
Accession number :
edsnas.20210012866
Document Type :
Report
Full Text :
https://doi.org/10.3847/1538-3881/abba3b