Vol. 641
2. Astrophysical processes

Fully compressible simulations of waves and core convection in main-sequence stars

by L. Horst, P. V. F. Edelmann, R. Andrassy, F. K. Röpke, D. M. Bowman, C. Aerts, and R. P. Ratnasingam 2020, A&A, 641, A18

Turbulent core convection provides one mechanism to excite stellar oscillations (e.g. internal gravity waves) that amplify and disperse in the interior as they propagate. The corresponding surface wave spectra and signatures are still being debated within current investigations using multidimensional hydrodynamical simulations. While many approaches use a modified version of the equations of hydrodynamics as a basis for modeling, the method presented in the paper also accounts for compressibility effects and is thus able to recover acoustic waves in addition to internal gravity waves.