Please use this identifier to cite or link to this item: http://hdl.handle.net/10125/39959

Quasi-periodic acceleration of electrons by a plasmoid-driven shock in the solar atmosphere

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dc.contributor.author Carley, Eoin P.
dc.contributor.author Long, David M.
dc.contributor.author Byrne, Jason P.
dc.contributor.author Zucca, Pietro
dc.contributor.author Bloomfield, D. Shaun
dc.contributor.author McCauley, Joseph
dc.contributor.author Gallagher, Peter T.
dc.date.accessioned 2016-03-09T23:01:35Z
dc.date.available 2016-03-09T23:01:35Z
dc.date.issued 2013-10
dc.identifier.uri http://hdl.handle.net/10125/39959
dc.description.abstract Cosmic rays and solar energetic particles may be accelerated to relativistic energies by shock waves in astrophysical plasmas. On the Sun, shocks and particle acceleration are often associated with the eruption of magnetized plasmoids, called coronal mass ejections (CMEs). However, the physical relationship between CMEs and shock particle acceleration is not well understood. Here, we use extreme ultraviolet, radio and white-light imaging of a solar eruptive event on 22 September 2011 to show that a CME-induced shock (Alfvén Mach number 2:4+0:7 -0:8) was coincident with a coronal wave and an intense metric radio burst generated by intermittent acceleration of electrons to kinetic energies of 2{46 keV (0.1{0.4 c). Our observations show that plasmoid-driven quasi-perpendicular shocks are capable of producing quasi-periodic acceleration of electrons, an effect consistent with a turbulent or rippled plasma shock surface.
dc.format.extent 20
dc.language.iso en-US
dc.publisher Nature Physics
dc.relation.uri http://www.nature.com/nphys/journal/v9/n12/full/nphys2767.html
dc.title Quasi-periodic acceleration of electrons by a plasmoid-driven shock in the solar atmosphere
dc.type Article
dc.type.dcmi Text
dc.identifier.doi 10.1038/nphys2767
Appears in Collections: Institute for Astronomy Faculty & Researcher Works


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