Are Decaying Magnetic Fields Above Active Regions Related to CME Onset?

Details Are Decaying Magnetic Fields Above Active Regions Related to CME Onset? Are Decaying Magnetic Fields Above Active Regions Related to CME Onset?

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh23a1938s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH23A-1938

Astronomy and Astrophysics

Astrophysics

[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7529] Solar Physics, Astrophysics, And Astronomy / Photosphere

Scientific paper

Coronal mass ejections (CMEs) are powered by magnetic energy stored in non-potential (current-carrying) coronal magnetic fields; the pre-CME field is thought to exhibit a balance between outward magnetic pressure of the proto-ejecta and inward magnetic tension from overlying fields that confine the proto-ejecta. In global potential (current-free) models of coronal magnetic fields --- potential field source-surface (PFSS) models --- above flare sites where CMEs originated, it has been noted that model field strengths are larger above sites where eruptions fail, suggesting potential field models might be useful to quantify magnetic confinement. One straightforward implication of this idea is that a decrease in model field strength overlying a possible eruption site should correspond to diminished confinement, implying an eruption is more likely. We have searched for such an effect by post facto investigation of the time evolution of model field strengths above a sample of 10 eruption sites. To check if the strengths of overlying fields were relevant only in relatively slow CMEs, we included both slow and fast CMEs in our sample.

Affiliated with

Also associated with

No associations

Rating

Are Decaying Magnetic Fields Above Active Regions Related to CME Onset? 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 Are Decaying Magnetic Fields Above Active Regions Related to CME Onset?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Are Decaying Magnetic Fields Above Active Regions Related to CME Onset? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-877491