Three-Dimensional MHD Models for the Interaction between the Solar Wind and the Interstellar Medium

Publications of the Astronomical Society of Japan

Washimi, Haruichi²  Nozawa, Satoshi¹ 

[1] Department of Earth Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310;Shonan Institute of Technology, Tsujido, Fujisawa, Kanagawa 251

关键词: Heliosphere;    "Interstellar: medium";    Magnetohydrodynamics;    "solar wind";   

DOI  :  10.1093/pasj/49.3.383

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Weattemptedtoperformaglobalthree-dimensional(3-D)MHDcomputersimulationoftheouterheliosphereundertheinteractionofthesolarwindplasmawiththeinterstellarmedium,andshowedthatMHDprocessesareimportantinanalyzing3-Dglobalheliosphericstructure.Themagneticpressureeffectoftheinterplanetaryspiralfield,whichhasbeendiscussedtheoreticallyandanalyzedbya2-Dsimulation,wasexaminedindetailinour3-Dglobalsystem.Thecontractionofthescaleoftheterminalshockduetothemagneticpressureeffectwasanalyzedquantitatively.Itwasfoundthatinthedownstreamsideoftheinterstellarflow,themagneticpressureforcecontractsthescaleoftheterminalshockmoreevidently,whichproducesanisotropicstructureoftheshockratherthanabullet-typeshapewhichwasobtainedbyahydrodynamicsimulation.Collimatedpolarstreamsofthesolarwindduetothemagneticpressurearealsofoundintheheliosheath.Inaddition,themagneticpressureisfoundtomakethesheetplasmamoredominantalongtheequatorialdiskintheheliosheath.

【 授权许可】

Unknown