POSSIBLE LINE FEATURES OF STELLAR P-MODES

We describe an illustrative cavity model with a radially narrow acoust ic source sphere inside the convection zone for stellar p-modes. The s tellar transition region acts as an outer reflection boundary with par tial leakage. Based on analytical solutions, we discuss several qualit ative line features of stellar p-modes. This model implies that both t raveling and standing acoustic waves could coexist in the stellar phot osphere and chromosphere with perturbation frequency nu higher than th e acoustic cutoff frequency nu(c). Furthermore, the source-cavity inte rference could lead to the beating effect in stellar p-mode power peak s in a wider frequency range.