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Stream dynamics between 1 AU and 2 AU - A comparison of observations and theoryA radial alignment of three solar wind stream structures observed by IMP-7 and -8 (at 1.0 AU) and Voyager 1 and 2 (in the range 1.4 to 1.8 AU) in late 1977 is presented. It is demonstrated that several important aspects of the observed dynamical evolution can be both qualitatively and quantitatively described with a single-fluid 2-D MHD numerical model of quasi-steady corotating flow, including accurate prediction of: (1) the formation of a corotating shock pair at 1.75 AU in the case of a simple, quasi-steady stream; (2) the coalescence of the thermodynamic and magnetic structures associated with the compression regions of two neighboring, interacting, corotating streams; and (3) the dynamical destruction of a small (i.e., low velocity-amplitude, short spatial-scale) stream by its overtaking of a slower moving, high-density region associated with a preceding transient flow. The evolution of these flow systems is discussed in terms of the concepts of filtering and entrainment.
Document ID
19850062275
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Burlaga, L. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Pizzo, V.
(High Altitude Observatory Boulder, CO, United States)
Lazarus, A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gazis, P.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
August 1, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Solar Physics
Accession Number
85A44426
Distribution Limits
Public
Copyright
Other

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