2013/02/26 by O. Benomar, T. R. Bedding, B. Mosser +11 · 58 citations
Physics and Astronomy · #Asteroseismology #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics and Star Formation Studies #Flare star #Globular cluster #K-type main-sequence star #Kepler #Oscillation (cell signaling) #Physics #Stars #Stellar, planetary, and galactic studies #Subgiant #T Tauri star #astro-ph.SR
paper · pdf · doi:10.1088/0004-637x/767/2/158
published in The Astrophysical Journal 767(2), 158 (IOP Publishing) · Accepted to ApJ
arxiv created 2013/02/26 · openalex publication_date 2013/04/08 · arxiv updated 2015/06/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
Mixed modes seen in evolved stars carry information on their deeper layers that can place stringent constraints on their physics and on their global properties (mass, age, etc.). In this study, we present a method to identify and measure all oscillatory mode characteristics (frequency, height, width). Analyzing four subgiant stars, we present the first measure of the effect of the degree of mixture on the ℓ = 1 mixed mode characteristics. We also show that some stars have measurable ℓ = 2 mixed modes and discuss the interest of their measure to constrain the deeper layers of stars.