太阳线性无力场评注和快速傅氏分析法的应用  

Comments on Solar Linear Force-Free Field and Application of FFT Analysis

作　　者：宋慕陶[1] 张延安[1] 

机构地区：[1]中国科学院紫金山天文台,南京210008

出　　处：《天文学报》2004年第4期361-380,共20页Acta Astronomica Sinica

基　　金：国家自然科学基金(10333030)和(10273023)资助项目

摘　　要：首先对30年来用无力场计算太阳活动区磁场方法作了一些评注,特别研究了线性无力场解中的几个误区.提出了准线性无力场方法并探讨了快速傅氏变换在线性无力场计算中的应用.以2000年9月15日NOAA 9165活动区磁场为例,应用3种不同的方法计算出磁力线走向,然后同紫金山天文台赣榆观测站观测的精细Hα图形对比.Some comments are made on the computation of solar active region magnetic field in the last thirty years, especially on some errors in linear force-free field representations. A new method based on quasi-linear force-free field is suggested. Also, fast Fourier transformation applied to linear force-free field computation is re-examined. As an example, the field configuration of NOAA 9165 active region is computed, using three different methods. The comparison between the computed results and the fine Hα- filtergram observed at Gan-Yu station of purple Mountain observatory is made.

关 键 词：力场 线性 磁场 准线 图形 分析法 太阳活动 紫金山天文台 NOAA 快速傅氏变换 

分 类 号：P182[天文地球—天文学] O441[理学—电磁学]