Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh51c1686j&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH51C-1686
Astronomy and Astrophysics
Astrophysics
[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields
Scientific paper
Coronal mass ejections (CMEs) are thought to be powered by the free energy in the solar source regions. The magnetic helicity in the source regions is one of the indicators of this free energy. In order to see the relationship between the magnetic helicity of CME source regions and CME energy, we considered a set of 41 solar source regions (from solar cycle 23) from which CMEs erupted and ended up as magnetic clouds near Earth. Using EUV and magnetogram data from the Solar and Heliospheric Observatory (SOHO) mission, we determined the most probable linear force-free magnetic structure and its magnetic helicity for each CME source region. The magnetograms taken just prior to the CME eruption were used to compute the magnetic helicity. The CME speeds were obtained from the SOHO/LASCO CME catalog (http://cdaw.gsfc.nasa.gov). We found that the magnetic helicity is positively correlated with the speed of CMEs. This result suggests that the magnetic helicity of CME source regions maybe useful for predicting CME speed.
Akiyama Sanae
Gopalswamy Nat
Jung Haemyeong
Xie Hehu
Yashiro Seiji
No associations
LandOfFree
Relation between CME Speed and Magnetic Helicity in Solar Source Regions 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 Relation between CME Speed and Magnetic Helicity in Solar Source Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relation between CME Speed and Magnetic Helicity in Solar Source Regions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1511496