Remote sensing of the Solar Corona using Decametric Solar bursts

Details Remote sensing of the Solar Corona using Decametric Solar bursts Remote sensing of the Solar Corona using Decametric Solar bursts

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....2320b&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #2320

Physics

Scientific paper

We investigate the spectral proprieties of more than 100 Type III Solar bursts observed at the Lustbühel radio station (Austria) in the frequency range from 29 MHz to 42 MHz. These radio decametric bursts were recorded by a digital spectro-polarimeter receiver with a time resolution of about 50 milliseconds. The observational parameters of our analysis are: the intensity distribution, the frequency bandwidth and the time duration. The first results of our study are: (1) the intensity distribution seems to be the combination of two superposed Gaussians due to the Type III radio bursts and the surrounding instrumental noises, (2) the average time duration is found to be about 3 sec with a standard deviation of about 4 sec, and only few events (less than 5% of the total number of Type III) have a life-time more than 10 sec, and (3) the Type III bursts could be classified in three groups with regard to their frequency bandwidths (i.e. 10 MHz, 7 MHz and 3 MHz). These results are discussed and compared to models which provide more information on the physical mechanisms occurring in the plasma of the Solar corona.

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