Alfvén wave heating and acceleration of plasmas in the solar transition region producing jet-like eruptive activity

S. Whitelam, J. M. A. Ashbourn, R. Bingham, P. K. Shukla, D. S. Spicer

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We present an analysis of observations and theory of selected transition-region phenomena, concentrating on small scale jet-like structures known as spicules and macrospicules. We examine a number of mechanisms that may be responsible for their formation and conclude that Alfvén waves could provide the necessary acceleration through the ponderomotive force and dissipation for heating forming a beam or jet like structure. In applying the Alfvén wave model we make no fundamental distinction between spicules and macrospicules. In this respect we consider them to be manifestations of the same phenomenon on different scales. We predict that the most effective Alfvén waves have frequencies around 1 Hz and amplitudes of 1 V m−1. The resulting plasma jet sets up plasma conditions suitable for creating rotating structures which are also observed.
LanguageEnglish
Pages199-219
Number of pages21
JournalSolar Physics
Volume211
Issue number1-2
DOIs
Publication statusPublished - 1 Dec 2002

Fingerprint

solar transition region
magnetohydrodynamic waves
spicules
spicule
heating
plasma
ponderomotive forces
concentrating
plasma jets
dissipation

Keywords

  • Alfvén waves
  • spicules
  • macrospicules
  • ponderomotive force

Cite this

Whitelam, S. ; Ashbourn, J. M. A. ; Bingham, R. ; Shukla, P. K. ; Spicer, D. S. / Alfvén wave heating and acceleration of plasmas in the solar transition region producing jet-like eruptive activity. In: Solar Physics. 2002 ; Vol. 211, No. 1-2. pp. 199-219.
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Alfvén wave heating and acceleration of plasmas in the solar transition region producing jet-like eruptive activity. / Whitelam, S.; Ashbourn, J. M. A.; Bingham, R.; Shukla, P. K.; Spicer, D. S.

In: Solar Physics, Vol. 211, No. 1-2, 01.12.2002, p. 199-219.

Research output: Contribution to journalArticle

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AU - Whitelam, S.

AU - Ashbourn, J. M. A.

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