Method for determining the parameters of full halo coronal mass ejections

Details Method for determining the parameters of full halo coronal mass ejections Method for determining the parameters of full halo coronal mass ejections

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ge%26ae..46..339f&link_type=abstract

Geomagnetism and Aeronomy, Volume 46, Issue 3, pp.339-349

Physics

1

96.60.Ph

Scientific paper

A method for determining the parameters of halo-type coronal mass ejections (full halo CMEs)—direction of motion, angular size, CME velocity along the Sun-Earth axis, etc.—has been proposed and tested. The method is based on the found empirical dependence between the angular sizes of CMEs located near the sky plane and angular sizes of associated eruptive prominences or post-eruptive arcades as well as on the relationships between the halo CME parameters derived in a simple geometrical CME model. Using this method and the SOHO/LASCO C3 and SOHO/EIT data, the parameters of 33 full halo CMEs have been determined. It is concluded that (1) the trajectories of all considered full halo CMEs deviate with recession of the CME front to R F > (2 5) R 0 toward the Sun-Earth axis; (2) the majority of full halo CMEs recorded by LASCO C3 coronagraphs have relatively large angular sizes, 2α > 60°.

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