Estimation of coronal mass ejection magnetic strength iusing observations of radio gyrosynchrotron emissions; no
Abstract
Coronal mass ejections (CMEs) are usually associated with radio emissions originating from the associated flare and shock. In very few cases, gyrosynchrotron emission produced during the development of the CME allows for a diagnostic of the CME magnetic field strength. Such a diagnostic is important for evaluating the total magnetic energy content of the CME, which is ultimately what drives the eruption. We report here on a rare source of CME-associated gyrosynchrotron radiation observed from 300 MHz to 5 GHz by the Nançay Radioheliograph (NRH) and the Radio Solar Telescope Network (RSTN). Using this radio analysis and X-ray diagnostics from the Fermi Gamma Ray Burst Monitor (GBM) and the GOES Soft X-ray Imager (SXI), we calculated the CME magnetic and energetic electron properties. We thus estimate a value of 4.4 G in the CME core at a height of 1.3 Rs.
- Publication:
-
Solar Heliospheric and INterplanetary Environment (SHINE 2018)
- Pub Date:
- July 2018
- Bibcode:
- 2018shin.confE.200V