Helioseismic Ring Analysis of CME Source Regions
S. C. Tripathy, S. de Wet, K. Jain, R. Clark, F. Hill
TL;DR
This study uses helioseismic ring analysis to examine the acoustic properties of CME source regions, revealing potential predictive indicators based on magnetic flux and mode lifetimes.
Contribution
It introduces a novel application of ring diagram analysis to CME regions, identifying magnetic flux as a key factor in mode lifetime and potential CME forecasting.
Findings
CME regions with low magnetic flux have narrower line widths.
Longer mode lifetimes are observed in CME regions with low magnetic flux.
The magnetic flux criterion may help forecast CME-active regions.
Abstract
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.
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