PUZZLES OF THE INTERPLANETARY MAGNETIC FIELD IN THE INNER HELIOSPHERE
作者： Olga Khabarova , Vladimir Obridko
DOI: 10.1088/0004-637X/761/2/82
关键词: Solar wind 、 Magnetic reconnection 、 Bimodality 、 Magnetic field 、 Heliosphere 、 Astronomy 、 Adiabatic process 、 Interplanetary magnetic field 、 Physics 、 Heliospheric current sheet 、 Astrophysics 、 Space and Planetary Science 、 Astronomy and Astrophysics
摘要: Deviations of the interplanetary magnetic field (IMF) from Parker's model are frequently observed in heliosphere at different distances r Sun. Usually, it is supposed that IMF behavior corresponds to overall, but there some turbulent component impacts and disrupts full picture spatial temporal distribution. However, analysis multi-spacecraft in-ecliptic measurements 0.29 AU 5 AU shows radial evolution rather far expected. The decreases with adiabatic power index (|Br | –5/3), tangential |Br| –1, strength B –1.4. This means not completely frozen solar wind. It possible processes inner significantly influence expansion. confirmed by Br distribution's evolution. has a well-known bimodal histogram only 0.7-2.0 AU. bimodality effect gradually disappears 1 AU 4 AU, becomes quasi-normally distributed 3-4 AU (which sign rapid vanishing stable sector structure heliocentric distance). We consider quasi-continuous reconnection, occurring both heliospheric current sheet local sheets inside sectors, be key process responsible for wind turbulization distance as well breakdown frozen-in law.
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