High‐frequency modes in solar‐like stars

摘要: p-mode oscillations in solar-like stars are excited by the outer convection zone these and reflected close to surface. The p modes trapped inside an acoustic cavity, but only stay up a given frequency [known as cut-off (νac)] with larger frequencies generally not at This means that than must be travelling waves. high-frequency may provide information about physics layers of excitation source therefore highly interesting it is estimation two phenomena cause some largest uncertainties when calculating stellar oscillations. High-frequency have been detected Sun, β Hydri α Cen A B smoothing so-called echelle diagram large separation function has estimated. compared simple model cavity which suggests reflectivity photosphere high predicted standard models solar atmosphere depth what estimated other might depend on order n degree l modes.