Abstract
ABSTRACT 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.
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Schedule a callMore From: Monthly Notices of the Royal Astronomical Society: Letters
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