Energy spectral property in an isolated CME-driven shock

Observations from multiple spacecraft show that there are energy spectral ＂breaks＂ at 1-10 MeV in some large CME-driven shocks. However, numerical models can hardly simulate this property due to high computational expense. The present paper focuses on analyzing these energy spectral ＂breaks＂ by Mont...

Full description

Saved in:
Bibliographic Details
Published in:Research in astronomy and astrophysics 2016-02, Vol.16 (2), p.105-112
Main Authors: Wang, Xin, Yan, Yi-Hua, Ding, Ming-De, Wang, Na, Shan, Hao
Format: Article
Language:English
Subjects:
acceleration of particles
Astronomy
Breaking
Computer simulation
Cut off
Energy of formation
Formations
Mathematical models
methods: numerical
shock waves
solar wind
Spectra
Sun: coronal mass ejections (CMEs)
天体测量
天体物理学
天文学
天文观测
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Observations from multiple spacecraft show that there are energy spectral ＂breaks＂ at 1-10 MeV in some large CME-driven shocks. However, numerical models can hardly simulate this property due to high computational expense. The present paper focuses on analyzing these energy spectral ＂breaks＂ by Monte Carlo particle simulations of an isolated CME-driven shock. Taking the 2006 Dec 14 CME-driven shock as an example, we investigate the formation of this energy spectral property. For this purpose, we apply different values for the scattering time in our isolated shock model to obtain the highest energy ＂tails,＂ which can potentially exceed the ＂break＂ energy range. However, we have not found the highest energy ＂tails＂ beyond the ＂break＂ energy range, but instead find that the highest energy ＂tails＂ reach saturation near the range of energy at 5 MeV. So, we believe that there exists an energy spectral ＂cut off＂ in an isolated shock. If there is no interaction with another shock, there would not be formation of the energy spectral ＂break＂ property.
ISSN:1674-4527
2397-6209
DOI:10.1088/1674-4527/16/2/032