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Type III bursts in interplanetary space - Fundamental or harmonic?ISEE-3 spacecraft observation of 120 relatively simple, isolated bursts in the 30-1980 kHz range are the basis of the present study of Type III bursts in the solar wind. Several characteristics are identified for many of these bursts which imply that the mode of emission changes from predominantly fundamental plasma radiation during the rise phase to predominantly second harmonic during decay. The fundamental emission begins in time coincidence with the start of Langmuir waves, confirming the conventional belief in these waves' causation of Type III bursts. Attention is given to the characteristics of fundamental components, by comparison to harmonics, at km-wavelengths.
Document ID
19850036781
Document Type
Reprint (Version printed in journal)
Authors
Dulk, G. A. (Paris, Observatoire, Meudon, Hauts-de-Seine, France; Colorado, University Boulder, CO, United States)
Steinberg, J. L. (Observatoire de Paris-Meudon France)
Hoang, S. (Paris, Observatoire, Meudon Hauts-de-Seine, France)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: Astronomy and Astrophysics
Volume: 141
Issue: 1 De
ISSN: 0004-6361
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-91
CONTRACT_GRANT: NSG-7287
Distribution Limits
Public
Copyright
Other