# The Ion-Induced Charge-Exchange X-Ray Emission of the Jovian Auroras: Magnetospheric or Solar Wind Origin?

 Title: The Ion-Induced Charge-Exchange X-Ray Emission of the Jovian Auroras: Magnetospheric or Solar Wind Origin? Author: Hui, Yawei; Schultz, David R.; Kharchenko, Vasili A.; Stancil, Philip C.; Cravens, Thomas E.; Lisse, Carey M.; Dalgarno, Alexander Note: Order does not necessarily reflect citation order of authors. Citation: Hui, Yawei, David R. Schultz, Vasili A. Kharchenko, Phillip C. Stancil, Thomas E. Cravens, Carey M. Lisse, and Alexander Delgarno. 2009. The ion-induced charge-exchange X-ray emission of the Jovian Auroras: Magnetospheric or solar wind origin? The Astrophysical Journal Letters 702(2): L158. Full Text & Related Files: Delgarno - The ion-induced.pdf (352.3Kb; PDF) Abstract: A new and more comprehensive model of charge-exchange induced X-ray emission, due to ions precipitating into the Jovian atmosphere near the poles, has been used to analyze spectral observations made by the Chandra X-ray Observatory. The model includes for the first time carbon ions, in addition to the oxygen and sulfur ions previously considered, in order to account for possible ion origins from both the solar wind and the Jovian magnetosphere. By comparing the model spectra with newly reprocessed Chandra observations, we conclude that carbon ion emission provides a negligible contribution, suggesting that solar wind ions are not responsible for the observed polar X-rays. In addition, results of the model fits to observations support the previously estimated seeding kinetic energies of the precipitating ions (~0.7-2 MeV u$$^{–1})$$, but infer a different relative sulfur-to-oxygen abundance ratio for these Chandra observations. Published Version: doi:10.1088/0004-637X/702/2/L158 Other Sources: http://arXiv.org/pdf/0907.1672 Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5131501

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