Helical blowout jets in the sun: untwisting and propagation of waves

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Abstract

We report on a numerical experiment of the recurrent onset of helical "blowout" jets in an emerging flux region. We find that these jets are running with velocities of ∼100-250 km s-1 and they transfer a vast amount of heavy plasma into the outer solar atmosphere. During their emission, they undergo an untwisting motion as a result of reconnection between the twisted emerging and the non-twisted pre-existing magnetic field in the solar atmosphere. For the first time in the context of blowout jets, we provide direct evidence that their untwisting motion is associated with the propagation of torsional Alfvén waves in the corona.

Original languageEnglish
Article numberL10
Pages (from-to)1-6
Number of pages6
JournalAstrophysical Journal Letters
Volume798
Issue number1
Early online date16 Dec 2014
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Magnetohydrodynamics (MHD)
  • Sun: activity
  • Sun: interior
  • Sun: magnetic fields

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