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Statistical Survey of Type III Radio Bursts at Long Wavelengths Observed by the Solar TErrestrial RElations Observatory (STEREO)/Waves Instruments: Radio Flux Density Variations with Frequency |
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| Authors: | V. Krupar M. Maksimovic O. Santolik E. P. Kontar B. Cecconi S. Hoang O. Kruparova J. Soucek H. Reid A. Zaslavsky |
| Affiliation: | 1. Institute of Atmospheric Physics ASCR, Bocni II 1403, Prague, 141 31, Czech Republic 2. LESIA, UMR CNRS 8109, Observatoire de Paris, Meudon, 92195, France 3. Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, Prague, 121 16, Czech Republic 4. Department of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK |
| Abstract: | We have performed a statistical study of 152 Type III radio bursts observed by Solar TErrestrial RElations Observatory (STEREO)/Waves between May 2007 and February 2013. We investigated the flux density between 125 kHz and 16 MHz. Both high- and low-frequency cutoffs were observed in 60 % of events, suggesting an important role of propagation. As already reported by previous authors, we observed that the highest flux density occurs at 1 MHz on both spacecraft. We developed a simplified analytical model of the flux density as a function of radial distance and compared it with the STEREO/Waves data. |
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