Estimation of projection effect of CMEs from onset time of type III radio bursts.

Details Estimation of projection effect of CMEs from onset time of type III radio bursts. Estimation of projection effect of CMEs from onset time of type III radio bursts.

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh22a05m&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SH22A-05

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2

7513 Coronal Mass Ejections

Scientific paper

We present a new possibility to estimate the projection effect on CME measurements. We assume that (1) high energy electrons are produced at the shock front ahead of the CME, and (2) the radio burst starts when the shock reaches open field lines ( ~ 3 R). In other words, the onset time of the radio burst corresponds to the time when the CME leading edge reaches 3 R. It is well known that white light observations of halo CMEs with the LASCO coronagraph are subject projection effects. Fortunately, the Wind/WAVES experiment observations of type III radio burst associated with shock waves are free from this problems. The difference between onset times of CMEs and radio bursts should be strongly correlated with the position of CMEs on the Sun. We try to determine this correlation and use it to estimate the real starting position of CMEs.

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