Spectral analysis of solar radio type III burst groups

Details Spectral analysis of solar radio type III burst groups Spectral analysis of solar radio type III burst groups

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991cha%26a..15..298p&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 15, Issue 3, p. 298-305.

Astronomy and Astrophysics

Astrophysics

Solar Radio Emission-Radio Bursts-Spectral Analysis

Scientific paper

Using the high time resolution and high sensitivity data on the intensity, polarization, position and size of Type III burst groups obtained at 5 frequencies with the Nan\¯ccay radio heliograph, we have made a careful Fourier transform spectral analysis. Our study further confirms the existence of periodicity in Type III burst groups, most of the events have periods between 1 and 6 seconds and show multiple periods at 90% confidence level or better. Especially we found that the Type III burst groups can be divided into two classes, one with weak polarization and with periods over a wide range up to 6 seconds, the other with strong polarization and short periods less than 2 seconds and smaller size compact sources.

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