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Possible signatures of nonlinear MHD waves in the solar wind: UVCS observations and modelsRecent ultraviolet coronagraph spectrometer (UVCS) white light channel observations are discussed. These data indicated quasi-periodic variations in the polarized brightness in the polar coronal holes. The Fourier power spectrum analysis showed significant peaks at about six minutes and possible fluctuations on longer time scales. The observations are consistent with the predictions of the nonlinear solitary-like wave model. The purpose of a planned study on plume and inter-plume regions of coronal holes, motivated by the result of a 2.5 magnetohydrodynamic model (MHD), is explained.
Document ID
19990028122
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Ofman, L.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Romoli, M.
(Florence Univ. Italy)
Davila, J. M.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Poletto, G.
(Osservatorio Astrofisico di Arcetri Florence Italy)
Kohl, J.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA United States)
Noci, G.
(Florence Univ. Italy)
Date Acquired
August 19, 2013
Publication Date
September 1, 1997
Subject Category
Solar Physics
Distribution Limits
Public
Copyright
Other
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