NDLI: ALFVÉN WAVES IN SHEAR FLOWS REVISITED

Content Provider	Scilit
Author	Hollweg, Joseph V. Kaghashvili, Edisher Kh.
Copyright Year	2011
Description	Journal: The Astrophysical Journal We revisit our earlier study of the evolution of an initial propagating Alfvén wave in a magnetic-field-aligned flow with a cross-field velocity shear. Our goal is to show how the Alfvén wave drives up plasma density fluctuations which might be observed and serve as a signature of the presence of Alfvén waves in regions such as the solar corona which are inaccessible to direct observations. Here, we introduce a new initial condition which takes into account the initial distortion of the streamlines by the Alfvén wave, and we present new analytical results for the driven waves. We find that the density fluctuations of a properly placed linearly polarized Alfvén wave in a shear flow are much smaller than we originally estimated.
Related Links	http://iopscience.iop.org/article/10.1088/0004-637X/744/2/114/pdf
ISSN	0004637X
DOI	10.1088/0004-637x/744/2/114
Journal	The Astrophysical Journal
Issue Number	2
Volume Number	744
Language	English
Publisher	IOP Publishing
Publisher Date	2011-12-20
Access Restriction	Open
Subject Keyword	Journal: The Astrophysical Journal Astronomy and Astrophysics Wave in a Shear Flow
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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