DETERMINATION OF SUB-RESOLUTION STRUCTURE OF A JET BY SOLAR MAGNETOSEISMOLOGY

R. J. Morton*, G. Verth, J. A. McLaughlin, R. Erdelyi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

A thin dark thread is observed in a UV/EUV solar jet in the 171 angstrom, 193 angstrom, and 211 angstrom, and partially in 304 angstrom. The dark thread appears to originate in the chromosphere but its temperature does not appear to lie within the passbands of the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory. We therefore implement solar magnetoseismology to estimate the plasma parameters of the dark thread. A propagating kink (transverse) wave is observed to travel along the dark thread. The wave is tracked over a range of similar to 7000 km by placing multiple slits along the axis of the dark thread. The phase speed and amplitude of the wave are estimated and magnetoseismological theory is employed to determine the plasma parameters. We are able to estimate the plasma temperature, density gradient, magnetic field gradient, and sub-resolution expansion of the dark thread. The dark thread is found to be cool, T less than or similar to 3 x 10(4), with both strong density and magnetic field gradients. The expansion of the flux tube along its length is similar to 300-400 km.

Original languageEnglish
Article number5
Number of pages11
JournalAstrophysical Journal
Volume744
Issue number1
DOIs
Publication statusPublished - 1 Jan 2012

Keywords

  • magnetic fields
  • magnetohydrodynamics (MHD)
  • plasmas
  • Sun: oscillations
  • X-RAY JETS
  • CORONAL LOOP OSCILLATIONS
  • IONIZED FILAMENT THREAD
  • TRANSITION REGION
  • TRANSVERSE OSCILLATIONS
  • MAGNETIC-FIELD
  • ALFVEN WAVES
  • MAGNETOHYDRODYNAMIC WAVES
  • CHROMOSPHERIC JET
  • QUIET SUN

Fingerprint

Dive into the research topics of 'DETERMINATION OF SUB-RESOLUTION STRUCTURE OF A JET BY SOLAR MAGNETOSEISMOLOGY'. Together they form a unique fingerprint.

Cite this