回旋波共振加热加速的多重离子流体模型  

A COMPARISON BETWEEN AN ION-CYCLOTRON RESONANCE MODEL FOR HEATING AND ACCELERATION OF THE SOLAR WIND AND THE OBSERVAIONS ON THE SOLAR POLAR CORONA HOLE BY UVCS ON SOHO

作　　者：束传政[1] 王玲华[1] 涂传诒[1] 

机构地区：[1]北京大学地球物理系,100871

出　　处：《空间科学学报》2000年第3期201-207,共7页Chinese Journal of Space Science

基　　金：国家自然科学基金!4987403;国家重大基金!49990452;高等学校博士学科点专项科研基金

摘　　要：在回旋波共振准线性理论基础上建立了自恰描述质子和氢离子各向异性温度和整体速度的双离子流体模型，求得数值解，并与UVCS观测相比较．发现在波谱斜率固定的假设下，模型的数值结果虽然与观测有相同趋势，但不能在误差范围之内解释全部观测现象．进一步的研究需要考虑波谱形状的自洽演化．A set of equations are developed for describing the spatial evolution in the polarcorona of anisotropic multi-ion-nuid properties based on the heating and acceleration by ion-cyclotron resonance. Numerical solutions of this equation set are usedto make a comparison with the recent observations by UVCS on SOHO (Kohl etal. 1998). If we assume that the spectrum of the cyclotron waves has a fixed slop, -2, themodel results can describe the UVCS observations for Helium (assuming for protons also)and for either the bulk speed of O+5 ions or the effective perpendicular thermal speed ofO+5 ions respectively if further assuming different amplitude of the waves. However we cannot describe both speeds with single wave amplitude. It is suggested that the fixed spectrumslope assumption, which is widely used in the study of this topic, may not describe the realsituation in corona.

关 键 词：太阳风 冕洞高速流 回旋波共振 离子流体 UVCS 

分 类 号：P182[天文地球—天文学]