Abstract
The new method of a remote diagnostic of the interacting Solar Wind (SW) plasma and neutral heliospheric gas has been recently developed, employing the charge‐exchange mechanism of Extreme Ultraviolet (EUV) and X‐ray emissions. Physics of collisions between heavy solar wind ions and neutral atoms and molecules from the interstellar, planetary, and cometary gases, is briefly reviewed. The charge‐exchange mechanism of X‐ray and EUV emissions induced by highly charged SW ions is described in detail. Unique spectra of cascading photons produced in collisions between heavy SW ions and neutral atoms or molecules are demonstrated. Emission spectra of individual SW ions are analyzed and compared with the results of recent laboratory measurements and quantal calculations. The synthetic spectra of the charge‐exchange EUV and X‐ray emission are constructed for the slow and fast solar wind, interacting with cometary, planetary and interstellar gases. Results of spectral modeling are compared with observational data f...
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