Coronal mass ejections and their sheath regions in interplanetary space
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Journal Title
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Volume Title
A2 Katsausartikkeli tieteellisessä aikakauslehdessä
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Date
2017-11-24
Major/Subject
Mcode
Degree programme
Language
en
Pages
83
Series
LIVING REVIEWS IN SOLAR PHYSICS, Volume 14
Abstract
Interplanetary coronal mass ejections (ICMEs) are large-scale heliospheric transients that originate from the Sun. When an ICME is sufficiently faster than the preceding solar wind, a shock wave develops ahead of the ICME. The turbulent region between the shock and the ICME is called the sheath region. ICMEs and their sheaths and shocks are all interesting structures from the fundamental plasma physics viewpoint. They are also key drivers of space weather disturbances in the heliosphere and planetary environments. ICME-driven shock waves can accelerate charged particles to high energies. Sheaths and ICMEs drive practically all intense geospace storms at the Earth, and they can also affect dramatically the planetary radiation environments and atmospheres. This review focuses on the current understanding of observational signatures and properties of ICMEs and the associated sheath regions based on five decades of studies. In addition, we discuss modelling of ICMEs and many fundamental outstanding questions on their origin, evolution and effects, largely due to the limitations of single spacecraft observations of thesemacro-scale structures. We also present current understanding of space weather consequences of these large-scale solar wind structures, including effects at the other Solar System planets and exoplanets. We specially emphasize the different origin, properties and consequences of the sheaths and ICMEs.Description
Keywords
Coronal mass ejections, Solar wind, Space weather, Interplanetary shocks, Magnetic clouds, SOLAR ENERGETIC PARTICLES, PLANAR MAGNETIC-STRUCTURES, HELIOSPHERIC CURRENT SHEET, INTER-PLANETARY SHOCK, EARTH-LIKE EXOPLANETS, IN-SITU OBSERVATIONS, FLUX ROPE MODELS, FORCE-FREE FIELD, 1 AU, RADIATION-BELT
Citation
Kilpua , E , Koskinen , H E J & Pulkkinen , T I 2017 , ' Coronal mass ejections and their sheath regions in interplanetary space ' , LIVING REVIEWS IN SOLAR PHYSICS , vol. 14 , 5 . https://doi.org/10.1007/s41116-017-0009-6
