Type III solar radio bursts and the fundamental-harmonic hypothesis

Details Type III solar radio bursts and the fundamental-harmonic hypothesis Type III solar radio bursts and the fundamental-harmonic hypothesis

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...42..247r&link_type=abstract

Solar Physics, vol. 42, May 1975, p. 247-257.

Astronomy and Astrophysics

Astronomy

13

Harmonic Generations, Plasma Frequencies, Solar Corona, Type 3 Bursts, Frequency Distribution, Radio Astronomy, Solar Physics, Time Lag

Scientific paper

The observational evidence is reviewed for the occurrence of type III solar radio bursts in pairs with frequency ratio two to one. We show that the observations can be explained under the hypothesis that there is a tendency for a type III burst to be followed by a second burst within approximately one second. This explanation leads to fewer difficulties than the hypothesis that type III bursts occur in pairs, one member being emitted at the fundamental of the local coronal plasma frequency, the other at its second harmonic. We conclude that in general, type III bursts are emitted at the second harmonic of the plasma frequency and that type III theories should account for this and only under very special circumstances (which are rare) for the emission at the fundamental and the second harmonic.

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