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SUMMARY:Plasma thermalisation from wave damping seen in super-penumbral fi
 brils
DTSTART;VALUE=DATE-TIME:20230509T152500Z
DTEND;VALUE=DATE-TIME:20230509T154000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115653Z
UID:indico-contribution-310@meetings.aip.de
DESCRIPTION:Speakers: William Bate (Queen's University Belfast)\nThe Inter
 ferometric Bidimensional Spectrometer (IBIS) at the Dunn Solar Telescope (
 DST) was employed to capture high spatial resolution spectral scans of a s
 unspot in the H-alpha line. These scans allowed for the examination of sup
 er-penumbral fibrils\, including their transverse motions both parallel an
 d perpendicular to the line of sight. Near ubiquitous transverse oscillati
 ons of the fibrils have been observed and statistics gathered on their pro
 perties\, which are consistent with previous investigations. Further exami
 nation of cases demonstrating well-resolved fibril oscillations were perfo
 rmed\, which allowed us to track their propagation velocities and associat
 ed energy flux along the length of the fibril. Additionally\, analysis of 
 the H-alpha line width has been performed\, which is known to correlate wi
 th plasma temperature. This allowed for a unique investigation of whether 
 the energy damped from the transverse fibril oscillations provides evidenc
 e of thermalisation of the local plasma. Here\, I will report on the energ
 y damping and associated fluctuations in the H-alpha line width\, which we
  believe is evidence of MHD wave dissipation in the form of plasma thermal
 isation.\n\nhttps://meetings.aip.de/event/24/contributions/310/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/310/
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