Violent solar events of October-November 2003 as recorded by IZMIRAN radio observations

Details Violent solar events of October-November 2003 as recorded by IZMIRAN radio observations Violent solar events of October-November 2003 as recorded by IZMIRAN radio observations

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26at...24...45c&link_type=abstract

Astronomical and Astrophysical Transactions, vol. 24, Issue 1, p.45-52

Astronomy and Astrophysics

Astronomy

2

Sun, Corona, Flare, Coronal Mass Ejection, Radio Emission

Scientific paper

The extreme solar activity of October November 2003 was recorded at IZMIRAN with digital radiospectrographs at 25 270MHz and fixed-frequency radiometers at 169, 204 and 3000MHz. An outstanding metre-wavelength noise storm took place during the fist passage of the grandiose evolving active complex across the disc which testifies to permanent electron acceleration over the complex with energy of up to tens of kiloelectronvolts. Against this background, intense metric and microwave radio bursts were recorded in association with several outstanding flare and huge coronal mass ejection (CME) events. The dynamic spectra of these events display multiband and sometimes fine-structure type II bursts, initiated by coronal shocks, and various continuum emissions. In some cases, a corresponding microwave burst at 3000MHz includes not only an impulsive component coinciding with a flare maximum but also a predominating delayed long-duration component with a smooth time profile. The latter component is thought to be linked with a post-eruptive energy release and particle acceleration when the magnetic field, strongly disturbed by a CME, relaxes to a new quasi-equilibrium configuration via reconnection in high coronal levels.

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