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Title: The Ion-induced Charge-exchange X-ray Emission of the Jovian Auroras: Magnetospheric or Solar Wind Origin?

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), but infer a different relative sulfur to oxygen abundance ratio for these Chandra observations.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [5]
  1. ORNL
  2. University of Georgia, Athens, GA
  3. University of Kansas
  4. Johns Hopkins University
  5. Harvard-Smithsonian Center for Astrophysics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
Work for Others (WFO)
OSTI Identifier:
974629
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal. Letters to the Editor
Additional Journal Information:
Journal Volume: 702; Journal Issue: 2; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABUNDANCE; CARBON IONS; CHARGE EXCHANGE; KINETICS; ORIGIN; OXYGEN; SOLAR WIND; SPECTRA; SULFUR; SULFUR IONS

Citation Formats

Hui, Yawei, Schultz, David Robert, Kharchenko, Vasili A, Stancil, Phillip C., Cravens, Thomas E. E., Lisse, Carey M., and Dalgarno, A. The Ion-induced Charge-exchange X-ray Emission of the Jovian Auroras: Magnetospheric or Solar Wind Origin?. United States: N. p., 2009. Web. doi:10.1088/0004-637X/702/2/L158.
Hui, Yawei, Schultz, David Robert, Kharchenko, Vasili A, Stancil, Phillip C., Cravens, Thomas E. E., Lisse, Carey M., & Dalgarno, A. The Ion-induced Charge-exchange X-ray Emission of the Jovian Auroras: Magnetospheric or Solar Wind Origin?. United States. https://doi.org/10.1088/0004-637X/702/2/L158
Hui, Yawei, Schultz, David Robert, Kharchenko, Vasili A, Stancil, Phillip C., Cravens, Thomas E. E., Lisse, Carey M., and Dalgarno, A. 2009. "The Ion-induced Charge-exchange X-ray Emission of the Jovian Auroras: Magnetospheric or Solar Wind Origin?". United States. https://doi.org/10.1088/0004-637X/702/2/L158.
@article{osti_974629,
title = {The Ion-induced Charge-exchange X-ray Emission of the Jovian Auroras: Magnetospheric or Solar Wind Origin?},
author = {Hui, Yawei and Schultz, David Robert and Kharchenko, Vasili A and Stancil, Phillip C. and Cravens, Thomas E. E. and Lisse, Carey M. and Dalgarno, A.},
abstractNote = {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), but infer a different relative sulfur to oxygen abundance ratio for these Chandra observations.},
doi = {10.1088/0004-637X/702/2/L158},
url = {https://www.osti.gov/biblio/974629}, journal = {Astrophysical Journal. Letters to the Editor},
issn = {0004-637X},
number = 2,
volume = 702,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}