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Artículo

A High-Eccentricity Warm Jupiter Orbiting TOI-4127

Gupta, Arvind F.; Jackson, Jonathan M.; Hébrard, Guillaume; Lin, Andrea S. J.; Stassun, Keivan G.; Dong, Jiayin; Villanueva, Steven; Dragomir, Diana; Mahadevan, Suvrath; Wright, Jason T.; Almenara, Jose M.; Blake, Cullen H.; Boisse, Isabelle; Cortés Zuleta, Pía; Dalba, Paul A.; Díaz, Rodrigo FernandoIcon ; Ford, Eric B.; Forveille, Thierry; Gagliano, Robert; Halverson, Samuel; Heidari, Neda; Kanodia, Shubham; Kiefer, Flavien; Latham, David w.; McElwain, Michael W.; Stefánsson, Gudmundur; Terrien, Ryan C.; Ting, Eric B.; Winn, Joshua N.; Youngblood, Allison
Fecha de publicación: 05/2023
Editorial: IOP Publishing
Revista: Astronomical Journal
ISSN: 0004-6256
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

We report the discovery of TOI-4127 b, which is a transiting, Jupiter-sized exoplanet on a long-period ( P=56.39879+0.00010−0.00010 days) and a high-eccentricity orbit around a late F-type dwarf star. This warm Jupiter was first detected and identified as a promising candidate from a search for single-transit signals in TESS Sector 20 data, and was later characterized as a planet following two subsequent transits (TESS Sectors 26 and 53) and follow-up ground-based RV observations with the NEID and SOPHIE spectrographs. We jointly fit the transit and RV data to constrain the physical ( Rp=1.096+0.039−0.032RJ , Mp=2.30+0.11−0.11MJ ) and orbital parameters of the exoplanet. Given its high orbital eccentricity ( e=0.7471+0.0078−0.0086 ), TOI-4127 b is a compelling candidate for studies of warm Jupiter populations and of hot Jupiter formation pathways. We show that the present periastron separation of TOI-4127 b is too large for high-eccentricity tidal migration to circularize its orbit, and that TOI-4127 b is unlikely to be a hot Jupiter progenitor unless it is undergoing angular momentum exchange with an undetected outer companion. Although we find no evidence for an external companion, the available observational data are insufficient to rule out the presence of a perturber that can excite eccentricity oscillations and facilitate tidal migration.
Palabras clave: Exoplanet astronomy , Exoplanet dynamics , Transit photometry , Radial velocity , Elliptical orbits
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/254228
URL: https://iopscience.iop.org/article/10.3847/1538-3881/accb9b
DOI: http://dx.doi.org/10.3847/1538-3881/accb9b
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Articulos (ICIFI)
Articulos de INSTITUTO DE CIENCIAS FISICAS
Citación
Gupta, Arvind F.; Jackson, Jonathan M.; Hébrard, Guillaume; Lin, Andrea S. J.; Stassun, Keivan G.; et al.; A High-Eccentricity Warm Jupiter Orbiting TOI-4127; IOP Publishing; Astronomical Journal; 165; 6; 5-2023; 1-18
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