Solar coronal heating by short-wavelength dispersive shear Alfvén waves

R Bingham, P K Shukla, B Eliasson, A Cairns

Research output: Contribution to journalArticle

Abstract

The electron heating of the solar coronal plasma has remained as one of the most important problems in solar physics. An explanation of the electron heating rests on the identification of the energy source and appropriate physical mechanisms via which the energy can be channelled to the electrons. Our objective here is to present an estimate for the electron heating rate in the presence of finite amplitude short-wavelength (in comparison with the ion gyroradius) dispersive shear Alfven (SWDSA) waves that propagate obliquely to the ambient magnetic field direction in the solar corona. Specifically, it is demonstrated that SWDSA waves can significantly contribute to the solar coronal electron heating via collisionless heating involving SWDSA wave-electron interactions.
LanguageEnglish
Article number108004
Number of pages4
JournalPhysica Scripta
Volume90
Issue number10
DOIs
Publication statusPublished - 15 Sep 2015

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magnetohydrodynamic waves
Heating
Electron
Wavelength
shear
heating
wavelengths
electrons
solar physics
ions
solar corona
energy sources
Corona
Energy
electron scattering
Plasma
Magnetic Field
Physics
estimates
magnetic fields

Keywords

  • solar coronal plasma
  • solar physics
  • electron heating

Cite this

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abstract = "The electron heating of the solar coronal plasma has remained as one of the most important problems in solar physics. An explanation of the electron heating rests on the identification of the energy source and appropriate physical mechanisms via which the energy can be channelled to the electrons. Our objective here is to present an estimate for the electron heating rate in the presence of finite amplitude short-wavelength (in comparison with the ion gyroradius) dispersive shear Alfven (SWDSA) waves that propagate obliquely to the ambient magnetic field direction in the solar corona. Specifically, it is demonstrated that SWDSA waves can significantly contribute to the solar coronal electron heating via collisionless heating involving SWDSA wave-electron interactions.",
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Solar coronal heating by short-wavelength dispersive shear Alfvén waves. / Bingham, R; Shukla, P K; Eliasson, B; Cairns, A.

In: Physica Scripta, Vol. 90, No. 10, 108004, 15.09.2015.

Research output: Contribution to journalArticle

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AU - Bingham, R

AU - Shukla, P K

AU - Eliasson, B

AU - Cairns, A

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AB - The electron heating of the solar coronal plasma has remained as one of the most important problems in solar physics. An explanation of the electron heating rests on the identification of the energy source and appropriate physical mechanisms via which the energy can be channelled to the electrons. Our objective here is to present an estimate for the electron heating rate in the presence of finite amplitude short-wavelength (in comparison with the ion gyroradius) dispersive shear Alfven (SWDSA) waves that propagate obliquely to the ambient magnetic field direction in the solar corona. Specifically, it is demonstrated that SWDSA waves can significantly contribute to the solar coronal electron heating via collisionless heating involving SWDSA wave-electron interactions.

KW - solar coronal plasma

KW - solar physics

KW - electron heating

UR - http://stacks.iop.org/1402-4896/90/108004

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