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Dynamical evolution of interplanetary magnetic fields and flows between 0.3 AU and 8.5 AU: EntrainmentThe radial evolution of interplanetary flows and associated magnetic fields between 0.3 AU and 8.5 was analyzed using data from Helios 1 and Voyager 1, respectively. During a 70 day interval Voyager 1 observed two streams which appeared to be recurrent and which had little fine structure. The corresponding flows observed by Helios 1 were much more complex, showing numerous small streams, transient flows and shocks as well as a few large corotating streams. It is suggested that in moving to 8 AU the largest corotating streams swept up the slower flows (transient and/or corotating streams) and shocks into a relatively thin region in which they coalesced to form a single large amplitude compression wave. This combined process of sweeping and coalescence is referred to as entrainment. The resulting large amplitude compression wave is different from that formed by the steepening of a corotating stream from a coronal hole, because different flows from distinct sources, with possibly different composition and magnetic polarity, are brought together to form a single new structure.
Document ID
19830011396
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Burlaga, L. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States Germany)
Schwenn, R. (Max-Planck-Institut fuer Aeronomie Kartlenburg-Lindau,)
Rosenbauer, H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1983
Subject Category
Astrophysics
Report/Patent Number
NASA-TM-84955
NAS 1.15:84955
Accession Number
83N19667
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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