The p-mode spectrum of Arcturus from a decade of SONG radial velocities

Le résumé fourni par la source

Arcturus is a benchmark luminous red giant in the northern hemisphere. We will present a complete analysis of nearly ten years of high-precision SONG radial-velocity observations of Arcturus, obtained between 2016 and 2025. The data set contains more than 15,000 individual velocities and provides an exceptionally high signal-to-noise ratio in the oscillation power spectrum. The central result is that the SONG velocity data allow individual p-mode frequencies in Arcturus to be measured with a precision and frequency resolution that are difficult to achieve for stars at a similar evolutionary stage. The SONG observations therefore provide what may be the most precise p-mode frequency set yet obtained for a star at this evolutionary stage.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.