Cometary X-Rays: Line Emission Cross Sections for Multiply Charged Solar Wind Ion Charge Exchange

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Absolute line emission cross sections are presented for 1 keV/amu charge exchange collisions of multiply charged solar wind ions with H{sub 2}O, H, O, CO{sub 2}, and CO cometary targets. The present calculations are contrasted with available laboratory data. A parameter-free model is used to successfully predict the recently observed x-ray spectra of comet C/LINEAR 1999 S4. We show that the resulting spectrum is extremely sensitive to the time variations of the solar wind composition. Our results suggest that orbiting x-ray satellites may be a viable way to predict the solar wind intensities and composition on the Earth many hours ... continued below

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Otranto, S; Olson, R E & Beiersdorfer, P December 22, 2006.

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Absolute line emission cross sections are presented for 1 keV/amu charge exchange collisions of multiply charged solar wind ions with H{sub 2}O, H, O, CO{sub 2}, and CO cometary targets. The present calculations are contrasted with available laboratory data. A parameter-free model is used to successfully predict the recently observed x-ray spectra of comet C/LINEAR 1999 S4. We show that the resulting spectrum is extremely sensitive to the time variations of the solar wind composition. Our results suggest that orbiting x-ray satellites may be a viable way to predict the solar wind intensities and composition on the Earth many hours before the ions reach the earth.

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PDF-file: 9 pages; size: 0.1 Mbytes

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  • Journal Name: Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 40, no. 10, January 1, 2007, pp. 1755-1766; Journal Volume: 40; Journal Issue: 10

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  • Report No.: UCRL-JRNL-227014
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 972835
  • Archival Resource Key: ark:/67531/metadc926232

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Office of Scientific & Technical Information Technical Reports

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  • December 22, 2006

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 22, 2016, 10:48 p.m.

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Otranto, S; Olson, R E & Beiersdorfer, P. Cometary X-Rays: Line Emission Cross Sections for Multiply Charged Solar Wind Ion Charge Exchange, article, December 22, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc926232/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.