Radio Observations of the January 20, 2005 X-Class Event

Abstract

We present a multi-frequency and multi-instrument study of the 20 January 2005 event. We focus mainly on the complex radio signatures and their association with the active phenomena taking place: flares, CMEs, particle acceleration and magnetic restructuring. As a variety of energetic particle accelerators and sources of radio bursts are present, in the flare-ejecta combination, we investigate their relative importance in the progress of this event. The dynamic spectra of {Artemis-IV-Wind/Waves-Hiras with 2000 MHz-20 kHz frequency coverage, were used to track the evolution of the event from the low corona to the interplanetary space; these were supplemented with SXR, HXR and gamma-ray recordings. The observations were compared with the expected radio signatures and energetic-particle populations envisaged by the {Standard Flare--CME model and the reconnection outflow termination shock model. A proper combination of these mechanisms seems to provide an adequate model for the interpretation of the observational data.

Accepted for publication in Solar Physics

References in corpus (6)

• Combined STEREO/RHESSI study of CME acceleration and particle acceleration in solar flares
• An Extreme Solar Event of 20 January 2005: Properties of the Flare and the Origin of Energetic Particles
• CME Propagation Characteristics from Radio Observations
• Acceleration of Relativistic Protons during the 20 January 2005 Flare and CME
• The improved ARTEMIS IV multichannel solar radio spectrograph of the University of Athens
• Radio Bursts Associated with Flare and Ejecta in the 13 July 2004 Event

Cited by in corpus (3)

• High resolution observations with Artemis-IV and the NRH. I. Type IV associated narrow-band bursts
• The relativistic solar particle event of 2005 January 20: origin of delayed particle acceleration
• Fine Structure of Metric Type-IV Radio Bursts Observed with the ARTEMIS-IV Radio Spectrograph: Association with Flares and Coronal Mass Ejections