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| Titel |
The statistical derivation of the dayside magnetosheath X-ray emissions based on THEMIS and Cluster data |
| VerfasserIn |
Andrew Dimmock, Philippe Escoubet, Lucile Turc, Katariina Nykyri |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250148143
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| Publikation (Nr.) |
 EGU/EGU2017-12375.pdf |
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| Zusammenfassung |
| The Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) is collaborative mission
between ESA and the Chinese Academy of Science. One of the main objectives is to the
study solar wind magnetosphere coupling by measuring in-situ plasma parameters and X-ray
emissions in the magnetosheath and polar cusps. In preparation for this, we determine the
X-ray emissions from the equatorial and polar dayside magnetosheath using THEMIS and
Cluster data.
We utilize data collected by THEMIS between January 2008 and July 2015 to derive
X-ray emissions from locally measured plasma properties. Based on these statistical
observations, we generate statistical maps and cross-sectional cuts of the equatorial
magnetosheath to: (1) investigate the dayside spatial distribution, (2) determine the location
of the maximum X-ray emissions relative to the magnetosheath boundaries, and (3) identify
possible solar wind dependencies. For the final point (3), we create subsets for low
(nswvsw <4.9x108 /cm2s) and strong (nsw vsw >4.9x108 /cm2s) solar wind flux;
these data show that X-ray emissions are greatly enhanced during strong solar wind
flux. We also plan to extend this study beyond the equatorial plane to map cusp
properties by including Cluster data. Finally, we compare the experimental X-ray
emissions to those derived based on MHD simulations for comparable upstream
conditions. |
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