Solar Cosmic Ray Acceleration by a Shock Wave in the Lower Solar Corona on November 22, 1977
| Autor: | E. G. Berezhko, S. N. Taneev, Sergey Starodubtsev, V. G. Grigor’ev |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Shock wave Astrophysics::High Energy Astrophysical Phenomena Stellar atmosphere General Physics and Astronomy Solar radius Cosmic ray 01 natural sciences Charged particle Computational physics Shock (mechanics) Physics::Space Physics 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Neutron Astrophysics::Earth and Planetary Astrophysics 010306 general physics Event (particle physics) |
| Zdroj: | Journal of Experimental and Theoretical Physics. 129:375-385 |
| ISSN: | 1090-6509 1063-7761 |
| DOI: | 10.1134/s1063776119080089 |
| Popis: | Based on the theory of diffusive shock acceleration of charged particles, we have investigated the spectra of protons recorded in the solar cosmic ray event near the Earth’s orbit on November 22, 1977 (ground level enhancement no. 30, GLE30). The proton flux data from the CPME instrument installed on the IMP-8 spacecraft and the worldwide network of neutron monitors have been used to analyze the event. Using GLE30 as an example, we have shown for the first time that solar cosmic rays of relativistic energies can be produced by a shock wave with a relatively low speed of 560 km s–1 in the lower solar corona at a distance up to 1.6 $${{R}_{ \odot }}$$ ( $${{R}_{ \odot }}$$ is the solar radius) within 615 s. The calculated proton spectra satisfactorily reproduce the measurements in the Earth’s orbit. |
| Databáze: | OpenAIRE |
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