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2020MNRAS.495L..61L - Mon. Not. R. Astron. Soc., 495, L61-L65 (2020)

The ancient main-sequence solar proxy HIP 102152 unveils the activity and rotational fate of our Sun.

LORENZO-OLIVEIRA D., MELENDEZ J., PONTE G. and YANA GALARZA J.

Abstract (from CDS):

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.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Sun: rotation - stars: activity - stars: chromospheres - stars: fundamental parameters - stars: rotation - stars: solar-type

Simbad objects: 1

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