The subseismic approximation for low-frequency modes of the Earth applied to low-degree, low-frequency g-modes of non-rotating stars

摘要: The subseismic approximation proposed by Smylie & Rochester (1981, Phys. Earth. Planet. Int., 24) for low-frequency modes in the Earth is used an asymptotic treatment of g-modes belonging to low-degree spherical harmonics case a non-rotating, spherically symmetric star which square Brunt-Vaisala frequency different from zero everywhere inside except at center and keeps same sign. neglects contribution Eulerian perturbation pressure Lagrangian that quantity relative stemming equilibrium gradient. In contrast procedure adopted standard theory, gravitational potential not neglected