1. Speed evolution of CME/shocks using multi-spacecraft observations of type II radio bursts: A case study
- Author
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J. A. Gonzalez-Esparza, Ernesto Aguilar-Rodriguez, Veronica Ontiveros, and T. Manuel-Hernandez
- Subjects
Shock wave ,Physics ,Spectrometer ,Shock (fluid dynamics) ,Spacecraft ,business.industry ,Astrophysics::High Energy Astrophysical Phenomena ,Physics::Space Physics ,Coronal mass ejection ,Astrophysics::Solar and Stellar Astrophysics ,Interplanetary medium ,Astronomy ,business - Abstract
We present a study which focuses on the speed evolution of a coronal mass ejection (CME)/shock associated with a type II radio burst observed on January 25, 2007. The type II burst feature had a multi-spacecraft coverage, being detected by the Wind/WAVES and the STEREO/WAVES radio instruments in the frequency range of 14 MHz to 90 kHz. The CME associated with the type II radio burst was observed by the SOHO/LASCO and the STEREO/SECCHI coronographs. Ground-based radio observations of the metric type II burst counterpart were obtained by the Bruny Island Radio Spectrometer (BIRS) in the frequency range of 40 MHz to 25 MHz. We analyzed the combined white-light and radio observations to infer the speed evolution of the CME/shock event. The CME/shock speed from the different data sets shows a significant deceleration near to the Sun followed by a slow and gradual deceleration in the interplanetary medium, which is consistent with the expected evolution of fast CME/shocks. Multi-spacecraft and combined white-li...
- Published
- 2013
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