Electronic Resource
Springer
Space science reviews
78 (1996), S. 129-136
ISSN:
1572-9672
Keywords:
anomalous cosmic rays
;
solar wind
;
termination shock
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Recent observations from the Voyager spacecraft have suggested that the spectrum of the anomalous cosmic ray component is relatively steep at the termination shock, which is believed to be responsible for accelerating these particles. This conclusion argues that the termination shock must be weak, which in turn requires that the upstream Mach number in the solar wind must be quite low, ∼2.4. It is pointed out that such conditions are unlikely to prevail at all locations along the shock front. However, it is possible for such conditions to exist at the interface between high speed streams at high heliographic latitudes and the region at low latitudes where high and low speed streams have interacted and come into equilibrium. This discussion suggests a preferred location for the injection of the anomalous component into the shock acceleration process.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00170799
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