Migration and Evolution of giant ExoPlanets (MEEP). II. Super-Jupiters and Lithium-rich host stars

Schulte, J.; Rodriguez, J.E.; Latham, D.W.; Shields, J.V.; Vowell, N.; Soares-Furtado, M.; Kotten, B.; Wang, X.; Collins, K.A.; Bieryla, A.; Quinn, S.N.; Benni, P.; Clark, C.A.; Craig, M.W.; DeRung, M.L.; Eastman, J.D.; Essack, Z.; Evans, P.; Gore, R.; Howell, S.B.; Kielkopf, J.F.; Littlefield, C.; Mann, A.W.; Marino, G.; Radford, D.J.; Stockdale, C.; Strakhov, I.A.; Tan, T.; Vezie, M.; Wang, S.; Watson, E.; Yee, S.W.; Ziegler, C.

Авторы: Schulte Jack, Rodriguez Joseph E., Latham David W., Shields Joshua V., Vowell Noah, Soares-Furtado Melinda, Kotten Brooke, Wang Xian-Yu, Collins Karen A., Bieryla Allyson, Quinn Samuel N., Benni Paul, Clark Catherine A., Craig Matthew W., DeRung Mara L., Eastman Jason D., Essack Zahra, Evans Phil, Gore Rebecca, Howell Steve B., Kielkopf John F., Littlefield Colin, Mann Andrew W., Marino Giuseppe, Radford Don J., Stockdale Chris, Strakhov Ivan A., Tan Thiam-Guan, Vezie Michael, Wang Songhu, Watson Emily, Yee Samuel W., Ziegler Carl
Журнал: Monthly Notices of the Royal Astronomical Society
Том: 543
Номер: 1
Год издания: 2025
Издательство: Oxford Journals, Oxford University Press
Местоположение издательства: Oxford, UK, England
Первая страница: 292
Последняя страница: 313
DOI: 10.1093/mnras/staf1455
Аннотация: Although hot Jupiters were the first exoplanets discovered orbiting main-sequence stars, the dominant mechanisms through which they form and evolve are not known. To address the questions surrounding their origins, the Migration and Evolution of giant ExoPlanets (MEEP) survey aims to create a complete, magnitude-limited (G<12.5) sample of hot Jupiters that can be used to constrain the frequency of different migration pathways. NASA's Transiting Exoplanet Survey Satellite provides the unique combination of sky coverage and photometric precision to achieve this goal, which will likely be a key result of the mission. In this second installment of the MEEP survey, we re-analyse one benchmark hot Jupiter system, TOI-4138, and discover four additional super-Jupiters which are each more than five times as massive as Jupiter: TOI-4773 b, TOI-5261 b, TOI-5350 b, and TOI-6420 b. One of these planets, TOI-5261 b, is 11.49 times the mass of Jupiter, nearly massive enough to ignite deuterium fusion, and has an eccentric (e=0.1585) orbit. TOI-4138, TOI-4773, TOI-5350, and TOI-6420 each have lithium absorption features in their spectra. TOI-4138 is an F-type subgiant with a lithium equivalent width of 120.±13 mÅ, which is ∼4.5σ larger than the median lithium equivalent width of a control sample of 1381 similar stars, making TOI-4138 a compelling candidate for planetary engulfment.
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Migration and Evolution of giant ExoPlanets (MEEP). II. Super-Jupiters and Lithium-rich host starsстатья

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