Magnetic Helicity Change Rate Associated with X-Class and M-Class Flares

Details Magnetic Helicity Change Rate Associated with X-Class and M-Class Flares Magnetic Helicity Change Rate Associated with X-Class and M-Class Flares

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004soph..225..311h&link_type=abstract

Solar Physics, Volume 225, Issue 2, pp.311-324

Physics

9

Scientific paper

We investigate the total helicity change rate of active regions during the time period of three X-class and five M-class flares using MDI full-disk magnetograms which are sufficient to calculate the advection and the shuffling terms. Two out of three regions with X-class flares show a significant change in the helicity change rate, while none of the five active regions with an associated M-class flare shows this behavior. A closer investigation of the active regions associated with a helicity change reveals certain peculiarities that point to an artificial signal due to the magnetic reversal effect. This is supported by the fact that a simulation of the reversal effect reproduces the same shape of the helicity signal, although with an amplitude one magnitude lower. We investigate active regions with no flaring activity and determine the fluctuations of the helicity change rate due to instrumental effects to be 12 × 1040 Mx2 h-1.

Affiliated with

Also associated with

No associations

Rating

Magnetic Helicity Change Rate Associated with X-Class and M-Class Flares 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 Magnetic Helicity Change Rate Associated with X-Class and M-Class Flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic Helicity Change Rate Associated with X-Class and M-Class Flares will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1166676