Forward Modeling of the Type III Radio Burst Exciter

Abstract

In this work, we propose a forward-modeling method to study the trajectory and speed of the interplanetary (IP) Type-III radio burst exciter. The model assumes that the source of an IP Type-III radio burst moves outward from the Sun following the Parker spiral field line. Using the arrival time of the radio waves at multiple spacecraft, we are able to determine the trajectory of the radio source in the Ecliptic plane, and its outward speed, as well as the injection time and longitude of the associated electron beam near the solar surface that triggers the Type-III radio burst. For the application of this method, we design a system to gather the arrival time of the radio wave from the radio dynamic spectra observed by Solar Terrestrial Relations Observatory (STEREO)/WAVES and Wind/WAVES. Then the system forward models the trajectory and speed of the radio burst exciter iteratively according to an evaluation function. Finally, we present a survey of four Type-III radio bursts that are well discussed in the literature. The modeled trajectories of the radio source are consistent with the previous radio-triangulation results, the longitude of the associated active region, or the location of Langmuir waves excited by the electron beam.

arXiv comment20 pages, 9 figures

References in corpus (9)

• A Review of Solar Type III Radio Bursts
• The large longitudinal spread of solar energetic particles during the January 17, 2010 solar event
• Tracing Electron Beams in the Sun's Corona with Radio Dynamic Imaging Spectroscopy
• Magnetic Reconnection Null Points as the Origin of Semi-relativistic Electron Beams in a Solar Jet
• A type III radio burst automatic analysis system and statistic results for a half solar-cycle with the Nançay Decameter Array data
• On the speed and acceleration of electron beams triggering interplanetary type III radio bursts
• Solar type III radio burst time characteristics at LOFAR frequencies and the implications for electron beam transport
• Statistical Survey of Type III Radio Bursts at Long Wavelengths Observed by the Solar TErrestrial RElations Observatory (STEREO)/Waves Instruments: Goniopolarimetric Properties and Radio Source Locations
• A Scenario for the Fine Structures of Solar Type IIIb Radio Bursts Based on the Electron Cyclotron Maser Emission

Cited by in corpus (5)

• Concept of the Solar Ring Mission: Overview
• Using radio triangulation to understand the origin of two subsequent type II radio bursts
• Tracking solar radio bursts using Bayesian multilateration
• Coronal Diagnostics of Solar Type-III Radio Bursts Using LOFAR and PSP Observations
• Coronal electron density: Insights from radio and in situ observations, and EUHFORIA modeling