Abstract
view Abstract Citations (31) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Lagrangian Derivation of the Action-Conservation Theorem for Density Waves Dewar, R. L. Abstract A simple, physical derivation of the continuity equation for wave action is obtained from Hamilton's principle and an averaged Lagrangian density As an example we briefly discuss electrostatic plasma waves, but the primary purpose of the paper is to derive the form of the wave action density for galactic spiral waves in a manner that is both simpler and more easily generalized than that of Shu. The wave action density is expressed in terms of a linear response function that may either he taken from previous work, or found from the single-particle averaged Lagrangian. Publication: The Astrophysical Journal Pub Date: June 1972 DOI: 10.1086/151490 Bibcode: 1972ApJ...174..301D full text sources ADS |
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