Observational evidence of CMEs interacting in the inner heliosphere as inferred from MHD simulations
Abstract
The interaction of multiple coronal mass ejections (CMEs) has been observed by LASCO coronagraphs and by near-Earth spacecraft, and it is thought to be an important cause of geo-effective storms, large solar energetic particles events and intense Type II radio bursts. New and future missions such as STEREO, the LWS Sentinels, and the Solar Orbiter will provide additional observations of the interaction of multiple CMEs between the Sun and the Earth. We present the results of simulations of two and more CMEs interacting in the inner heliosphere performed with the space weather modeling framework (SWMF). Based on those simulations, we discuss the observational evidence of the interaction of multiple CMEs, both in situ and from coronagraphs. The clearest evidence of the interaction of the CMEs are the large temperature in the sheath, due to the shocks merging, and the brightness increase in coronagraphic images, associated with the interaction of the leading edges. The importance of having multiple satellites at different distances and angular positions from the Sun is also discussed.
Publication Date
2-1-2008
Journal Title
Journal of Atmospheric and Solar-Terrestrial Physics
Publisher
Elsevier
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
N. Lugaz, W.B. Manchester IV, I.I. Roussev, T.I. Gombosi, Observational evidence of CMEs interacting in the inner heliosphere as inferred from MHD simulations, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 70, Issues 2–4, 2008, Pages 598-604, https://doi.org/10.1016/j.jastp.2007.08.033.