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A discussion of interplanetary postshock flows with two examplesPlasma and magnetometer observations of two types of flare-associated shock flows are described and compared with present models. One type represents a class of flows in which the shock is followed by a stream and separated from it by a region in which density, temperature, and speed decrease monotonically. Neither the blast wave model nor the two-stage model, in which the stream and the shock are attributed to the same flare, can quantitatively describe this class. The other type is characterized by a complex region between the shock and the following stream, which has many discontinuities and fluctuations but in which there is no increase in helium concentration. This class of event is not describable in terms of the conventional pictures presented, for example, by Hundhausen (1972). These two types of flow can be distinguished by using ground magnetograms, since the first type shows no sudden impulses following the shock, whereas the second type shows many.
Document ID
19740051265
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ogilvie, K. W.
Burlaga, L. F.
(NASA Goddard Space Flight Center Laboratory for Extraterrestrial Physics, Greenbelt, Md., United States)
Date Acquired
August 7, 2013
Publication Date
June 1, 1974
Publication Information
Publication: Journal of Geophysical Research
Volume: 79
Subject Category
Space Radiation
Accession Number
74A34015
Distribution Limits
Public
Copyright
Other

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