Two methods for separating the magnetospheric solar wind charge exchange soft X-ray emission from the diffuse X-ray background

作     者：YingJie Zhang TianRan Sun JenniferACarter WenHao Liu Steve Sembay ShuiNai Zhang Li Ji Chi Wang YingJie Zhang;TianRan Sun;Jennifer.A.Carter;WenHao Liu;Steve Sembay;ShuiNai Zhang;Li Ji;Chi Wang

作者机构：State Key Laboratory of Space WeatherNational Space Science CenterChinese Academy of SciencesBeijing 100190China College of Earth and Planetary SciencesThe University of Chinese Academy of SciencesBeijing 100190China School of Physics and AstronomyThe University of LeicesterLeicesterUK Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210008China 

出 版 物：《Earth and Planetary Physics》 (地球与行星物理（英文版）)

年 卷 期：2024年第8卷第1期

页      面：119-132页

核心收录：

学科分类：07[理学] 0708[理学-地球物理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by NNSFC grants 42322408,42188101 and 42074202 the Strategic Pioneer Program on Space Science,CAS Grant nos.XDA15350201 in part by the Research Fund from the Chinese Academy of Sciences the Specialized Research Fund for State Key Laboratories of China supported by the Young Elite Scientists Sponsorship Program(CAST-Y202045) supported by Royal Society grant DHFR1211068 

主　　题：solar wind charge exchange(SWCX) ROSAT All-Sky Survey(RASS) soft X-ray X-ray imaging magnetosphere 

摘      要：Solar wind charge exchange(SWCX)is the process of solar wind high-valence ions exchanging charges with neutral components and generating soft ***,detecting the SWCX emission from the magnetosphere is proposed as a new technique to study the magnetosphere using panoramic soft X-ray *** better prepare for the data analysis of upcoming magnetospheric soft X-ray imaging missions,this paper compares the magnetospheric SWCX emission obtained by two methods in an XMM-Newton observation,during which the solar wind changed *** two methods differ in the data used to fit the diffuse X-ray background(DXB)parameters in spectral *** method adding data from the ROSAT All-Sky Survey(RASS)is called the RASS *** method using the quiet observation data is called the Quiet method,where quiet observations usually refer to observations made by the same satellite with the same target but under weaker solar wind *** show that the spectral compositions of magnetospheric SWCX emission obtained by the two methods are very similar,and the changes in intensity over time are highly consistent,although the intensity obtained by the RASS method is about 2.68±0.56 keV cm^(-2)s^(-1)sr^(-1)higher than that obtained by the Quiet *** the DXB intensity obtained by the RASS method is about 2.84±0.74 keV cm^(-2)s^(-1)sr^(-1)lower than that obtained by the Quiet method,and the linear correlation coefficient between the difference of SWCX and DXB obtained by the two methods in diffe rent energy band is close to-1,the diffe rences in magnetospheric SWCX can be fully attributed to the diffe rences in the fitted *** difference between the two methods is most significant when the energy is less than 0.7 keV,which is also the main energy band of SWCX *** addition,the difference between the two methods is not related to the SWCX intensity and,to some extent,to solar wind conditions,because SWCX intensity typically va ries with the