Three-dimensional magnetohydrodynamic model of the interaction between the solar wind and cometary atmospheres

被引：6

作者：

Alexashov, D. B. ^{[1
,2
]}

Baranov, V. B. ^{[1
,3
]}

Lebedev, M. G. ^{[4
]}

机构：

[1] Russian Acad Sci, Ishlinsky Inst Problems Mech, Moscow 119526, Russia

[2] Space Res Inst, Moscow 117997, Russia

[3] Moscow MV Lomonosov State Univ, Fac Mech & Math, Moscow 119991, Russia

[4] Moscow MV Lomonosov State Univ, Fac Computat Math & Cybernet, Moscow 119234, Russia

来源：

FLUID DYNAMICS | 2015年 / 50卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

solar wind; cometary ionosphere; MHD flow; Halley comet; Churyumov-Gerasimenko comet; MAGNETIC-FIELD; MHD MODEL; HALLEY;

D O I：

10.1134/S0015462815010111

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A magnetohydrodynamic (MHD) model of the interaction between the solar wind and an expanding gas flow issuing from a comet nucleus is presented. The processes of photoionization of the neutral component of the comet matter and the resonance charge exchange between charged and neutral particles are taken into account, together with the interplanetary magnetic field effect. The adequacy of the single-fluid MHD approximation in describing the plasma flow with different temperatures of the components is shown. The model is numerically realized on the basis of the higher-order Godunov method using an approximate solution of the arbitrary MHD discontinuity breakdown problem. The results of a numerical investigation of the plasma and magnetic field parameters in the vicinity of a comet are presented for the conditions corresponding to the flyby of several spacecraft near comet Halley in March 1986 and the expected fly-round of comet Churyumov-Gerasimenko by the Rosetta spacecraft in 2015.

引用

页码：98 / 108

页数：11

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