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Temporal and Spatial Variations of Heliospheric X‐Ray Emissions Associated with Charge Transfer of the Solar Wind with Interstellar Neutrals

 

作者: I. P. Robertson,   T. E. Cravens,   S. Snowden,  

 

期刊: AIP Conference Proceedings  (AIP Available online 1903)
卷期: Volume 679, issue 1  

页码: 815-818

 

ISSN:0094-243X

 

年代: 1903

 

DOI:10.1063/1.1618715

 

出版商: AIP

 

数据来源: AIP

 

摘要:

X‐rays should be generated throughout the heliosphere as a consequence of charge transfer collisions between heavy solar wind ions and interstellar neutrals. The high charge state solar wind ions resulting from these collisions are left in highly excited states and emit extreme ultraviolet or soft X‐ray photons. X‐rays should also be generated because of charge transfer collisions with neutral hydrogen in the Earth’s geocorona. Originally a simple model was developed in which both the solar wind and the interstellar neutrals were assumed to be spherically symmetric and time independent. In our updated results, the hot model of Fahr [1] was used to model spatial variations of interstellar helium and hydrogen. At the same time a simple model was created to simulate X‐ray radiation due to the Earth’s geocorona. With the updated information, time independent maps of the heliospheric X‐ray emission across the sky were created. Measured time histories of the solar wind proton flux were used in this updated model and the results were compared with “long term enhancements” in the soft X‐ray background measured by the Ro¨entgen satellite (ROSAT) for the same time period. © 2003 American Institute of Physics

 

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