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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
TOI-4562b: A Highly Eccentric Temperate Jupiter Analog Orbiting a Young Field Star
Astronomical Journal, Volume 165, No. 3, Article 121, Year 2023
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Description
We report the discovery of TOI-4562b (TIC-349576261), a Jovian planet orbiting a young F7V-type star, younger than the Praesepe/Hyades clusters (<700 Myr). This planet stands out because of its unusually long orbital period for transiting planets with known masses (P orb = 225.11781 − 0.00022 + 0.00025 days) and because it has a substantial eccentricity (e = 0.76 − 0.02 + 0.02 ). The location of TOI-4562 near the southern continuous viewing zone of TESS allowed observations throughout 25 sectors, enabling an unambiguous period measurement from TESS alone. Alongside the four available TESS transits, we performed follow-up photometry using the South African Astronomical Observatory node of the Las Cumbres Observatory and spectroscopy with the CHIRON spectrograph on the 1.5 m SMARTS telescope. We measure a radius of 1.118 + 0.013 − 0.014 R J and a mass of 2.30 − 0.47 + 0.48 M J for TOI-4562b. The radius of the planet is consistent with contraction models describing the early evolution of the size of giant planets. We detect tentative transit timing variations at the ∼20 minutes level from five transit events, favoring the presence of a companion that could explain the dynamical history of this system if confirmed by future follow-up observations. With its current orbital configuration, tidal timescales are too long for TOI-4562b to become a hot Jupiter via high-eccentricity migration though it is not excluded that interactions with the possible companion could modify TOI-4562b’s eccentricity and trigger circularization. The characterization of more such young systems is essential to set constraints on models describing giant-planet evolution. © 2023. The Author(s). Published by the American Astronomical Society.
Authors & Co-Authors
Heitzmann, Alexis
Australia, Toowoomba
University of Southern Queensland
United Kingdom, London
Queen Mary University of London
Zhou, George
Australia, Toowoomba
University of Southern Queensland
Quinn, Samuel N.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Huang, Chelsea X.
Australia, Toowoomba
University of Southern Queensland
Dong, Jiayin
United States, New York
Simons Foundation
United States, University Park
Pennsylvania State University
Bouma, Luke G.
United States, Pasadena
California Institute of Technology
Dawson, Rebekah I.
United States, University Park
Pennsylvania State University
Wright, Duncan J.
Australia, Toowoomba
University of Southern Queensland
Collins, Karen A.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Barkaoui, Khalid
Belgium, Liege
Université de Liège
United States, Cambridge
Massachusetts Institute of Technology
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Wittenmyer, Robert A.
Australia, Toowoomba
University of Southern Queensland
Gillen, Edward
United Kingdom, London
Queen Mary University of London
United Kingdom, Cambridge
Department of Physics
Brahm, Rafael
Chile, Santiago
Universidad Adolfo Ibáñez
Chile, Santiago
Instituto Milenio de Astrofísica
Hobson, Melissa J.
Chile, Santiago
Instituto Milenio de Astrofísica
Germany, Heidelberg
Max Planck Institute for Astronomy
Hellier, Coel
United Kingdom, Keele
Keele University
Ziegler, Carl A.
United States, Nacogdoches
Stephen F. Austin State University
Briceño, César
Chile, La Serena
Cerro Tololo Inter American Observatory
Law, Nicholas M.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
Mann, Andrew W.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
Howell, Steve B.
United States, Moffett Field
Nasa Ames Research Center
Gnilka, Crystal L.
United States, Moffett Field
Nasa Ames Research Center
Littlefield, Colin
United States, Moffett Field
Nasa Ames Research Center
United States, Sonoma
Bay Area Environmental Research Institute
Latham, David W.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Lissauer, Jack J.
United States, Moffett Field
Nasa Ames Research Center
Newton, Elisabeth R.
United States, Hanover
Dartmouth College
Krolikowski, Daniel M.
United States, Austin
The University of Texas at Austin
Rampalli, Rayna
United States, Hanover
Dartmouth College
Douglas, Stephanie T.
United States, Easton
Lafayette College
Eisner, Nora L.
United Kingdom, Oxford
University of Oxford
Eschweiler, Thorsten
United Kingdom, Oxford
University of Oxford
Abe, Lyu
Unknown Affiliation
Guillot, Tristan
Unknown Affiliation
Ricker, George R.
Unknown Affiliation
Vanderspek, Roland K.
Unknown Affiliation
Seager, Sara
Unknown Affiliation
Jenkins, Jon M.
United States, Moffett Field
Nasa Ames Research Center
Ting, Eric B.
United States, Moffett Field
Nasa Ames Research Center
Winn, Joshua N.
Unknown Affiliation
Ciardi, David R.
Unknown Affiliation
Vanderburg, Andrew M.
Unknown Affiliation
Burke, Christopher J.
Unknown Affiliation
Rodriguez, David R.
Unknown Affiliation
Daylan, Tansu
Unknown Affiliation
Statistics
Authors: 43
Affiliations: 24
Identifiers
Doi:
10.3847/1538-3881/acb5a2
ISSN:
00046256
Study Design
Cohort Study