Altitude-dependent Emission of Type III Solar Radio Bursts

Details Altitude-dependent Emission of Type III Solar Radio Bursts Altitude-dependent Emission of Type III Solar Radio Bursts

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...621.1129w&link_type=abstract

The Astrophysical Journal, Volume 621, Issue 2, pp. 1129-1136.

Astronomy and Astrophysics

Astronomy

9

Sun: Particle Emission, Sun: Radio Radiation

Scientific paper

The present discussion complements a preceding article in which a cyclotron-maser theory of type III solar radio bursts is proposed. One important issue, which has not been addressed in any of the existing theories, is that in the event of a F-H pair emission dynamic spectra usually show an initial time delay of the fundamental (F) component after the harmonic (H) component has commenced. Moreover, the ratio of the starting frequencies of the H waves to those of the F waves is generally higher than 2. A plausible interpretation is that the emission of H waves starts at an altitude lower than that for F waves. This notion leads to the present study. Although it is formulated within the context of the cyclotron-maser scenario, the model of the source electrons is different from that discussed previously.

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