Heliospheric magnetic fields, energetic particles, and the solar cycle |
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| Authors: | Pter Kirly |
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| Institution: | (1) KFKI Research Institute for Particle and NuclearPhysics, POB 49, H-1525 Budapest 114, Hungary |
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| Abstract: | The heliosphere is the region filled with magnetized plasma of mainly solar origin. It extends from the solar corona to well
beyond the planets, and is separated from the interstellar medium by the heliopause. The latter is embedded in a complex and
still unexplored boundary region. The characteristics of heliospheric plasma, fields, and energetic particles depend on highly
variable internal boundary conditions, and also on quasi-stationary external ones. Both galactic cosmic rays and energetic
particles of solar and heliospheric origin are subject to intensity variations over individual solar cycles and also from
cycle to cycle. Particle propagation is controlled by spatially and temporally varying interplanetary magnetic fields, frozen
into the solar wind. An overview is presented of the main heliospheric components and processes, and also of the relevant
missions and data sets. Particular attention is given to flux variations over the last few solar cycles, and to extrapolated
effects on the terrestrial environment. |
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| Keywords: | Heliosphere heliopause termination shock solarcycle energetic particles interplanetary neutrals anomalous component cosmic rays interplanetary magnetic fields |
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