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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
TOI-4600 b and c: Two Long-period Giant Planets Orbiting an Early K Dwarf
Astrophysical Journal Letters, Volume 954, No. 1, Article L15, Year 2023
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Description
We report the discovery and validation of two long-period giant exoplanets orbiting the early K dwarf TOI-4600 (V = 12.6, T = 11.9), first detected using observations from the Transiting Exoplanet Survey Satellite (TESS) by the TESS Single Transit Planet Candidate Working Group. The inner planet, TOI-4600 b, has a radius of 6.80 ± 0.31 R ⊕ and an orbital period of 82.69 days. The outer planet, TOI-4600 c, has a radius of 9.42 ± 0.42 R ⊕ and an orbital period of 482.82 days, making it the longest-period confirmed or validated planet discovered by TESS to date. We combine TESS photometry and ground-based spectroscopy, photometry, and high-resolution imaging to validate the two planets. With equilibrium temperatures of 347 K and 191 K, respectively, TOI-4600 b and c add to the small but growing population of temperate giant exoplanets that bridge the gap between hot/warm Jupiters and the solar system’s gas giants. TOI-4600 is a promising target for further transit and precise RV observations to measure the masses and orbits of the planets as well as search for additional nontransiting planets. Additionally, with Transit Spectroscopy Metric values of ∼30, both planets are amenable for atmospheric characterization with JWST. Together, these will lend insight into the formation and evolution of planet systems with multiple giant exoplanets. © 2023. The Author(s). Published by the American Astronomical Society.
Authors & Co-Authors
Mireles, Ismael
United States, Albuquerque
The University of new Mexico
Dragomir, Diana
United States, Albuquerque
The University of new Mexico
Osborn, Hugh P.
Switzerland, Bern
University of Bern
United States, Cambridge
Massachusetts Institute of Technology
Hesse, Katharine M.
United States, Cambridge
Massachusetts Institute of Technology
Collins, Karen A.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Villanueva, Steven
United States, Greenbelt
Nasa Goddard Space Flight Center
Bieryla, Allyson
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Ciardi, David R.
United States, Pasadena
California Institute of Technology
Stassun, Keivan G.
United States, Nashville
Vanderbilt University
Harris, Mallory
United States, Albuquerque
The University of new Mexico
Lissauer, Jack J.
United States, Moffett Field
Nasa Ames Research Center
Schwarz, Richard P.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Srdoč, Gregor
Croatia, Viskovo
Kotizarovci Observatory
Barkaoui, Khalid
Belgium, Liege
Université de Liège
United States, Cambridge
Massachusetts Institute of Technology
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Riffeser, Arno
Germany, Munich
Ludwig-maximilians-universität München
McLeod, Kim K.
United States, Wellesley
Wellesley College
Pepper, Joshua A.
United States, Bethlehem
Lehigh University
Grieves, Nolan
Switzerland, Geneva
Faculty of Science
Passegger, V. M.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Spain, San Cristobal de la Laguna
Universidad de la Laguna
Germany, Hamburg
Universität Hamburg
United States, Norman
The University of Oklahoma
Ulmer-Moll, Solène
Switzerland, Geneva
Faculty of Science
Rodríguez, Joseph E.
United States, East Lansing
Michigan State University
Feliz, Dax L.
United States, New York
American Museum of Natural History
Quinn, Samuel N.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Boyle, Andrew W.
United States, Pasadena
California Institute of Technology
Fausnaugh, Michael M.
United States, Cambridge
Massachusetts Institute of Technology
Kunimoto, Michelle
United States, Cambridge
Massachusetts Institute of Technology
Rowden, Pamela
United Kingdom, London
Royal Astronomical Society
Vanderburg, Andrew M.
United States, Cambridge
Massachusetts Institute of Technology
Wohler, Bill
United States, Moffett Field
Nasa Ames Research Center
United States, Mountain View
Seti Institute
Jenkins, Jon M.
United States, Moffett Field
Nasa Ames Research Center
Latham, David W.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Ricker, George R.
United States, Cambridge
Massachusetts Institute of Technology
Seager, Sara
United States, Cambridge
Massachusetts Institute of Technology
Winn, Joshua N.
Unknown Affiliation
Statistics
Citations: 2
Authors: 34
Affiliations: 22
Identifiers
Doi:
10.3847/2041-8213/aceb69
ISSN:
20418205
Study Design
Cross Sectional Study
Study Approach
Quantitative