The ancient main-sequence solar proxy HIP 102152 unveils the activity and rotational fate of our Sun
Tipo
Artigo
Data de publicação
2020
Periódico
Monthly Notices of the Royal Astronomical Society: Letters
Citações (Scopus)
11
Autores
Lorenzo-Oliveira D.
Melendez J.
Ponte G.
Galarza J.Y.
Melendez J.
Ponte G.
Galarza J.Y.
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ISSN da Revista
Título de Volume
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Resumo
© 2020 Oxford University Press. All rights reserved.We present a detailed analysis of the possible future Sun's rotational evolution scenario based on the 8-Gyr-old solar twin HIP 102152. Using HARPS high-cadence observations (and TESS light curves), we analysed the modulation of a variety of activity proxies (Ca II, H I Balmer, and Na I lines), finding a strong rotational signal of 35.7 ± 1.4 d (log Bfactor ∼ 70, in the case of Ca II K line). This value matches with the theoretical expectations regarding the smooth rotational evolution of the Sun towards the end of the main sequence, validating the use of gyrochronology after solar age.