Classification of CMEs Based on Their Dynamics

A large set of coronal mass ejections CMEs (6621) has been selected to study their dynamics seen with the Large Angle and Spectroscopic Coronagraph (LASCO) onboard the Solar and Heliospheric Observatory (SOHO) field of view (LFOV). These events were selected based on having at least six height-time...

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Bibliographic Details
Published in:Solar physics 2016-05, Vol.291 (5), p.1417-1432
Main Authors: Nicewicz, J., Michalek, G.
Format: Article
Language:English
Subjects:
Acceleration
Astrophysics and Astroparticles
Atmospheric Sciences
Classification
Coronal mass ejection
Data points
Dynamic mechanical properties
Dynamic tests
Dynamics
Onboard
Physics
Physics and Astronomy
Solar flares
Solar physics
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Studies
Sun
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Summary:A large set of coronal mass ejections CMEs (6621) has been selected to study their dynamics seen with the Large Angle and Spectroscopic Coronagraph (LASCO) onboard the Solar and Heliospheric Observatory (SOHO) field of view (LFOV). These events were selected based on having at least six height-time measurements so that their dynamic properties, in the LFOV, can be evaluated with reasonable accuracy. Height-time measurements (in the SOHO/LASCO catalog) were used to determine the velocities and accelerations of individual CMEs at successive distances from the Sun. Linear and quadratic functions were fitted to these data points. On the basis of the best fits to the velocity data points, we were able to classify CMEs into four groups. The types of CMEs do not only have different dynamic behaviors but also different masses, widths, velocities, and accelerations. We also show that these groups of events are initiated by different onset mechanisms. The results of our study allow us to present a consistent classification of CMEs based on their dynamics.
ISSN:0038-0938
1573-093X
DOI:10.1007/s11207-016-0903-4