HELIOSPHERIC ASYMMETRIES AND 2–3 kHz RADIO EMISSION UNDER STRONG INTERSTELLAR MAGNETIC FIELD CONDITIONS
HELIOSPHERIC ASYMMETRIES AND 2–3 kHz RADIO EMISSION UNDER STRONG INTERSTELLAR MAGNETIC FIELD CONDITIONS
复制标题
强星际磁场条件下的日球层不对称性和 2-3 kHz 无线电发射
DOI：
10.1088/0004-637x/695/1/l31
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
G. Zank
中科院分区：
文献类型：
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作者：
N. Pogorelov;J. Heerikhuisen;J. Mitchell;I. Cairns;G. Zank
我们讨论了从太阳风与星际介质相互作用的三维模型(LISM)分析中得到的主要日球层不连续的不对称性。带电粒子的流动由理想MHD方程控制，中性粒子的输运由Boltzmann方程描述。重点讨论了在中性氢原子存在的星际磁场和行星际磁场(ISMF和IMF)的联合作用下，终端激波(TS)和日顶的不对称性。结果表明，强度大于4μG的ISMF可以解释旅行者1号和旅行者2号航天器观测到的TS日心距离相差10AU的原因。我们分析了中性氢流在无扰LISM中偏离其原始方向的偏转，并得出结论，它仍然在SOHO Swan实验中测量的范围内。利用对射电发射条件的新估计，分析了强ISMF对旅行者号航天器观测到的2-3 kHz射电辐射的影响。
We discuss the asymmetry of the major heliospheric discontinuities obtained from the analysis of three-dimensional modeling of the solar wind interaction with the local interstellar medium (LISM). The flow of charged particles is governed by the ideal MHD equations and the transport of neutral particles is described by the Boltzmann equation. The emphasis is on the asymmetries of the termination shock (TS) and the heliopause under the combined action of the interstellar and interplanetary magnetic fields (ISMF and IMF) in the presence of neutral hydrogen atoms. It is shown that an ISMF of a strength greater than 4 μG can account for the 10 AU difference in the TS heliocentric distances observed by the Voyager 1 and Voyager 2 spacecraft. We analyze the deflection of neutral hydrogen flow from its original direction in the unperturbed LISM and conclude that it remains within the range measured in the SOHO SWAN experiment. The impact is analyzed of a strong ISMF on the 2–3 kHz radio emission observed by the Voyager spacecraft, using new estimates of the radio emission conditions.