Interplanetary structures seen through radio emissions
Abstract
This review will first present the large scale properties of the solar wind and their variations from solar cycle to solar cycle provided by the radio observations of Ulysses. The in-situ measurements of the electronic density and temperature are obtained by using the method of quasi thermal noise spectroscopy. Many results in the understanding of solar activity and its link with the heliosphere have emerged from coordinated radio observations with observations in other parts of the electro-magnetic spectrum and with particle measurements. The launch in 2006 of the two STEREO spacecraft gave the first opportunity to detect events propagating from the solar surface through the corona and into the heliosphere. The secont part of this presentation will mainly focus on our knowledge of the Interplanetary Coronal Mass Ejections (ICMEs) and a subset of them, known as magnetic clouds: their origin and development, their propagation in the interplane-tary medium and their interaction with fast solar wind streams or with other fast ICMEs. The association between ICMEs and shocks detected by their radio emissions (type II bursts) will be reviewed. The last part will be devoted to our present knowledge on the origin and association of Solar Energetic Particle events (SEP) with ICMEs and of the radio diagnostics of their propagation into the interplanetary medium.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38.1582P