NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Incompressible magnetohydrodynamic surface waves - Nonlinear aspectsThe nonlinear properties of MHD surface waves in the solar atmosphere are investigated analytically, assuming that the fluid is incompressible and that the waves are confined to a single surface, with semiinfinite regions on both sides. The governing equations are derived in detail, and qualitative results are presented in a graph. For propagating waves, second-order terms in the wave amplitude are found to lead to wave steepening at leading or trailing edges, the steepening rate becoming very large as the threshold for the linear Kelvin-Helmholtz instability is approached. Second-order effects on standing waves include crest and trough sharpening (increasing with time), a current independent of distance on the surface but decreasing exponentially with distance from the surface, and pressure-field fluctuations of infinite extent. It is suggested that these effects could account for a large fraction of solar-atmosphere heating.
Document ID
19870057367
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hollweg, Joseph V.
(New Hampshire, University Durham, United States)
Date Acquired
August 13, 2013
Publication Date
June 15, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 317
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
87A44641
Funding Number(s)
CONTRACT_GRANT: NSG-7411
CONTRACT_GRANT: NAGW-76
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available