Title: The subseismic approximation for low-frequency modes of the earth applied to low-degree, low-frequency g-modes of nonrotating stars
Authors: Deboeck, I ×
Van Hoolst, Tim
Smeyers, Paul #
Issue Date: Jun-1992
Publisher: EDP Sciences
Series Title: Astronomy & Astrophysics vol:259 issue:1 pages:167-174
Abstract: The subseismic approximation proposed by Smylie & Rochester (1981) for low-frequency modes in the Earth is used in an asymptotic treatment of low-frequency g-modes belonging to low-degree spherical harmonics in the case of a non-rotating, spherically symmetric star in which the square of the Brunt-Vaisala frequency is different from zero everywhere inside the star except at the center and keeps the same sign. The approximation neglects the contribution of the Eulerian perturbation of the pressure to the Lagrangian perturbation of that quantity relative to the contribution stemming from the equilibrium pressure gradient. In contrast to the procedure adopted in the standard asymptotic theory, the Eulerian perturbation of the gravitational potential is not neglected.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
Physics and Astronomy - miscellaneous
× corresponding author
# (joint) last author

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