Evaluation of Coronal and Interplanetary Magnetic Field Extrapolation Using PSP Solar Wind Observation  

作　　者：Yue-Chun Song 

机构地区：[1]Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China [2]School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China

出　　处：《Research in Astronomy and Astrophysics》2023年第7期247-262,共16页天文和天体物理学研究（英文版）

摘　　要：Using solar wind observation near PSP perihelions as constraints,we have investigated the parameters in various PFSS model methods.It is found that the interplanetary magnetic field extrapolation with source surface height R_(SS)=2 Rs is better than that with R_(SS)=2.5 Rs.HMI and GONG magnetograms show similar performances in the simulation of magnetic field variation,but the former appears to have a slight advantage in reconstruction of intensity while the latter is more adaptable to sparser grids.The finite-difference method of constructing eigenvalue problems for potential fields can achieve similar accuracy as the analytic method and greatly improve the computational efficiency.MHD modeling performs relatively less well in magnetic field prediction,but it is able to provide rich information about solar-terrestrial space.

关 键 词：magnetohydrodynamics(MHD) (Sun:)solar—terrestrial relations (Sun:)solar wind magnetic fields 

分 类 号：P182[天文地球—天文学] P353