Coronal heating by the phase mixing of individual pulses propagating in coronal holes

A W Hood, S J Brooks, A N Wright

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

The propagation of Alfvenic pulses into an inhomogeneous model of a coronal hole is investigated. It is demonstrated that the standard exponential damping of a harmonically generated wavetrain, due to phase mixing, is replaced by a slower algebraic damping when individual pulses are considered, suggesting that pulses will transport energy higher into the corona than a wavetrain. In addition, the initial shape of the pulse is rapidly transformed into a travelling Gaussian pulse. When two pulses of opposite sign travelling in the same direction are generated, the pulses diffuse into each other and the decay of the amplitude is faster, although still algebraic.

Original languageEnglish
Pages (from-to)2307-2325
Number of pages19
JournalProceedings of the Royal Society A - Mathematical, Physical & Engineering Sciences
Volume458
Issue number2026
DOIs
Publication statusPublished - 8 Oct 2002

Keywords

  • Sun
  • magnetic fields
  • coronal heating
  • wave propagation
  • ALFVEN WAVES
  • OPEN ATMOSPHERE
  • MODES

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