HR: 0800h
AN: SH41B-1134    [Abstracts]
TI: Spectra of X-rays Induced by the Solar Wind from the Helium Focusing Cone
AU: * Kharchenko, V
EM: vkharchenko@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysic, 60 Garden Street, Cambridge, MA 02138 United States
AU: Dalgarno, A
EM: adalgarno@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysic, 60 Garden Street, Cambridge, MA 02138 United States
AB: The spectra of the X-ray and EUV emission induced by heavy solar wind ions, interacting with neutral helium atoms from the helium focusing cone, have been investigated. The X-ray brightness distribution, total and directional intensities of EUV and X-rays produced by the the Charge-Exchange (CX) mechanism have been calculated. Variability of the X-ray emission spectra have been investigated. The intensity ratios for different lines of the CX cascading emission of individual oxygen, carbon, nitrogen, and neon ions have been computed for the fast and slow solar winds. These ratios may be used for a remote diagnostic of the interaction between the solar wind and interstellar helium gas. The contribution of the double-electron capture (DEC) collisions to a population of the highly excited solar wind ions have been computed. Spectra of energetic Auger electrons produced in the DEC auto-ionizing collisions of highly-charged oxygen and carbon ions have been calculated. Results of our theoretical modeling of the helium cone X-ray and EUV emission are compared with the data from satellite observations.
DE: 2144 Interstellar gas
DE: 2164 Solar wind plasma
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005