Abstract
The atomic processes associated with the interaction of the Solar Wind (SW) ions with neutral interstellar, planetary, and cometary gases are briefly reviewed. The charge‐exchange mechanism of X‐ray and Extreme Ultraviolet (EUV) emission of the highly charged SW ions is described in detail. The unique spectra of cascading photons arising in collisions between heavy SW ions and neutral atoms or molecules are demonstrated. Emission spectra of individual SW ions are computed using results of recent laboratory measurements and quantal calculations. The synthetic spectra of the charge‐transfer EUV and X‐ray emission are constructed for the slow and fast solar wind interacting with the cometary and interstellar gases. Results of spectral modeling are compared with observational data from ROSAT, EUVE, FUSE and Chandra X‐ray telescopes. The contribution of the charge‐exchange mechanism to diffuse X‐ray background is evaluated. A remote diagnostic of the SW plasma and interstellar gas based on analysis of the char...
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