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Solar Physics

, 294:62 | Cite as

Forward Modeling of the Type III Radio Burst Exciter

  • Peijin Zhang
  • Chuanbing WangEmail author
  • Lin Ye
  • Yuming Wang
Article

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.

Keywords

Solar radio bursts Type III bursts Dynamic spectrum Waves propagation 

Notes

Acknowledgments

We are grateful to the STEREO and Wind mission teams, and NASA’s Space Physics Data Facility for providing the data needed for this study. The research was supported by the National Nature Science Foundation of China (41574167 and 41174123) and the Fundamental Research Funds for the Central Universities (WK2080000077). Y. Wang is supported by the grants from NSFC (41574165, 41774178 and 41842037).

Disclosure of Potential Conflicts of Interest

The authors declare that they have no conflicts of interest.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.CAS Key Laboratory of Geospace Environment, School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefeiChina
  2. 2.CAS Center for the Excellence in Comparative PlanetologyHefeiChina

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