The Spatial Distribution Of Comet - Solar Wind X-ray Spectra

Details The Spatial Distribution Of Comet - Solar Wind X-ray Spectra The Spatial Distribution Of Comet - Solar Wind X-ray Spectra

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusm.p43a..04b&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #P43A-04

Astronomy and Astrophysics

Astrophysics

6025 Interactions With Solar Wind Plasma And Fields, 7831 Laboratory Studies

Scientific paper

Charge exchange processes lead to characteristic X-ray emission spectra, which provide an excellent diagnostic tool for the interaction between comets and the solar wind. We have developed a model for the X-ray emission spectra of comets based upon measured charge exchange cross sections of astrophysically relevant ions. The results show that the differences in electron capture cross sections of solar wind carbon and oxygen ions result in distinctly different spatial distributions of X-ray emission from these species. Specifically, the ratio of the (OVIII+ OVII)/(CVI+CV) is shown to be a good measure of the solar wind velocity and cometary neutral density distribution. As such, this ratio opens a unique window on the interaction of the solar wind plasma and coma.

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