Observation of oscillations in coronal loops

Ineke De Moortel, J Ireland, Robert William Walsh

Research output: Contribution to journalLetterpeer-review

242 Citations (Scopus)

Abstract

On March 23rd 1999, a set of TRACE observations in the 171 Angstrom (Fe rx) bandpass was made of active region AR 8496. A wavelet analysis of a bright loop-footpoint to the south west of this active region displays outward propagating perturbations with periods 180-420 seconds at approximately 70-165 km s(-1). We suggest that these oscillations are slow magneto-acoustic waves propagating along the loop, carrying an estimated energy flux of 4 x 10(2) ergs cm(-2) s(-1).

Original languageEnglish
Pages (from-to)L23-L26
Number of pages4
JournalAstronomy & Astrophysics
Volume355
Issue number2
Publication statusPublished - Mar 2000

Keywords

  • magnetohydrodynamics (MHD)
  • Sun : activity
  • Sun : corona
  • Sun : oscillations
  • WAVES
  • MECHANISMS
  • PLUMES

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