Dynamic Fibrils in Ly-alpha

Details Dynamic Fibrils in Ly-alpha Dynamic Fibrils in Ly-alpha

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008espm...12.2.16k&link_type=abstract

"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/,

Physics

Scientific paper

We have detected dynamic fibrils (DFs) in Ly-alpha filtergrams taken with the rocket-borne Very high Angular resolution ULtraviolet Telescope (VAULT). Although the data consist of only a 1-min sequence of 4 images taken near the solar limb during the second VAULT flight, they enable us to identify and study the time evolution of over 50 DFs. Most show parabolic trajectories in their angular extent, with supersonic maximum velocities. The measured decelerations vary from sub-ballistic to super-ballistic. The similarities with DFs seen in Halpha suggest a common cause, possibly the presence of hot transition-region interfaces around cool oscillation-fed jets.

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