Large-Amplitude Velocity Fluctuations in Coronal Loops: Flare Drivers?

Details Large-Amplitude Velocity Fluctuations in Coronal Loops: Flare Drivers? Large-Amplitude Velocity Fluctuations in Coronal Loops: Flare Drivers?

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...629l.133n&link_type=abstract

The Astrophysical Journal, Volume 629, Issue 2, pp. L133-L136.

Astronomy and Astrophysics

Astronomy

10

Plasmas, Sun: Activity, Sun: Corona

Scientific paper

Recent space observations of coronal lines broadening during a flare occurrence suggest that unresolved nonthermal velocity rises well above the background level before the start of the flare, defined as the start of hard X-ray emission. Using a new shell model to describe the Alfvénic turbulence inside a coronal loop, it is shown that the occurrence of high values (of the order of 100 km s-1) of the large-scale fluctuating velocity can represent an efficient trigger to a nonlinear intermittent turbulent cascade and then to the generation of a burst of dissipated energy. The numerical results of the model furnish a well-supported physical explanation for the reason why large velocity fluctuations represent the flare trigger rather than the result of the later energy deposition.

Affiliated with

Also associated with

No associations

Rating

Large-Amplitude Velocity Fluctuations in Coronal Loops: Flare Drivers? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Large-Amplitude Velocity Fluctuations in Coronal Loops: Flare Drivers?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large-Amplitude Velocity Fluctuations in Coronal Loops: Flare Drivers? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1347264