Helioseismic ring analysis of CME source regions

We apply the ring diagram technique to source regions of halo coronal mass ejections (CMEs) to study changes in acoustic mode parameters before, during, and after the onset of CMEs. We find that CME regions associated with a low value of magnetic flux have line widths smaller than the quiet regions,...

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Bibliographic Details
Published in:Journal of astrophysics and astronomy 2008-06, Vol.29 (1-2), p.207-210
Main Authors: Tripathy, S. C., de Wet, S., Jain, K., Clark, R., Hill, F.
Format: Article
Language:English
Subjects:
Acoustics
Astronomy
Astrophysics and Astroparticles
Corona
Magnetic fields
Observations and Techniques
Physics
Physics and Astronomy
Seismology
Solar physics
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Summary:We apply the ring diagram technique to source regions of halo coronal mass ejections (CMEs) to study changes in acoustic mode parameters before, during, and after the onset of CMEs. We find that CME regions associated with a low value of magnetic flux have line widths smaller than the quiet regions, implying a longer life-time for the oscillation modes. We suggest that this criterion may be used to forecast the active regions which may trigger CMEs.
ISSN:0250-6335
0973-7758
DOI:10.1007/s12036-008-0026-x