Comparative Analysis and Variability of the Jovian X‐Ray Spectra Detected by the Chandra and XMM‐Newton Observatories

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Comparative Analysis and Variability of the Jovian X‐Ray Spectra Detected by the Chandra and XMM‐Newton Observatories

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dc.contributor.author Dalgarno, Alexander
dc.contributor.author Hui, Yawei
dc.contributor.author Schultz, David R.
dc.contributor.author Kharchenko, Vasili A.
dc.contributor.author Bhardwaj, Anil
dc.contributor.author Branduardi‐Raymont, Graziella
dc.contributor.author Stancil, Phillip C.
dc.contributor.author Cravens, Thomas E.
dc.contributor.author Lisse, Carey M.
dc.date.accessioned 2011-09-09T19:57:10Z
dc.date.issued 2010
dc.identifier.citation Hui, Yawei, David R. Schultz, Vasili A. Kharchenko, Anil Bhardwaj, Graziella Branduardi-Raymont, Phillip C. Stancil, Thomas E. Cravens, Carey M. Lisse, and Alexander Dalgarno. 2010. Comparative analysis and variability of the Jovian X‐ray spectra detected by the Chandra and XMM‐Newton observatories. Journal of Geophysical Research 115:A07102. en_US
dc.identifier.issn 0148-0227 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:5128478
dc.description.abstract Expanding upon recent work, a more comprehensive spectral model based on charge exchange induced X‐ray emission by ions precipitating into the Jovian atmosphere is used to provide new understanding of the polar auroras. In conjunction with the Xspec spectral fitting software, the model is applied to analyze observations from both Chandra and XMM‐Newton by systematically varying the initial precipitating ion parameters to obtain the best fit model for the observed spectra. In addition to the oxygen and sulfur ions considered previously, carbon is included to discriminate between solar wind and Jovian magnetospheric ion origins, enabled by the use of extensive databases of both atomic collision cross sections and radiative transitions. On the basis of fits to all the Chandra observations, we find that carbon contributes negligibly to the observed polar X‐ray emission suggesting that the highly accelerated precipitating ions are of magnetospheric origin. Most of the XMM‐Newton fits also favor this conclusion with one exception that implies a possible carbon contribution. Comparison among all the spectra from these two observatories in light of the inferred initial energies and relative abundances of precipitating ions from the modeling show that they are significantly variable in time (observation date) and space (north and south polar X‐ray auroras). en_US
dc.description.sponsorship Astronomy en_US
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.isversionof doi:10.1029/2009JA014854 en_US
dash.license LAA
dc.title Comparative Analysis and Variability of the Jovian X‐Ray Spectra Detected by the Chandra and XMM‐Newton Observatories en_US
dc.type Journal Article en_US
dc.description.version Version of Record en_US
dc.relation.journal Journal of Geophysical Research en_US
dash.depositing.author Dalgarno, Alexander
dc.date.available 2011-09-09T19:57:10Z

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  • FAS Scholarly Articles [6902]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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