EDP Sciences
Free access
Volume 417, Number 3, April III 2004
Page(s) 1133 - 1143
Section The Sun
DOI http://dx.doi.org/10.1051/0004-6361:20031774

A&A 417, 1133-1143 (2004)
DOI: 10.1051/0004-6361:20031774

Do X-ray plasma ejections accelerate Coronal Mass Ejections?

M. Tomczak

Astronomical Institute, University of Wroclaw, ul. Kopernika 11, 51-622 Wroclaw, Poland
(Received 6 January 2003 / Accepted 15 December 2003 )

The X1.2 flare occurred on 23 April 1998 approximately $13^{\circ}$ behind the eastern solar limb. Its C2.0 precursor is identified as a rapidly expanding system of magnetic loops that was well-observed by Yohkoh. Basic parameters of this ejection are estimated based on images from the SXT telescope. The evolution of the X-ray ejection is compared to a sequence of CME images obtained by the LASCO coronagraph onboard SOHO. Evidence that the X-ray ejection is responsible for an additional acceleration of the CME is presented. A possible scenario of the event is suggested.

Key words: Sun: corona -- flares -- coronal mass ejections (CMEs) -- X-rays, gamma rays

© ESO 2004