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Solar radio type III bursts and coronal density structures
Authors:Yolande Leblanc  Jérôme de la Noë
Institution:(1) Observatoire de Paris, Meudon, France
Abstract:The comparison of solar radio type III bursts measured at 169 MHz with K corona observations leads to the conclusion that about 75% of the active regions over which type III bursts occur are associated with low density coronal structures. The comparison with X-ray maps of the solar disk shows that all these regions are located in low intensity regions.It is concluded that the idea generally accepted that the type III bursts are associated with dense coronal structures and travel in these structures is not at all proven for a large number of cases.
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