Publication Date:
2020-04-07
Description:
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 analyzed 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 days (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.
Print ISSN:
1745-3925
Electronic ISSN:
1745-3933
Topics:
Physics
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