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| Titel |
Profiles of electron temperature and Bz along Earth's magnetotail |
| VerfasserIn |
A. V. Artemyev, A. A. Petrukovich, R. Nakamura, L. M. Zelenyi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 31, no. 6 ; Nr. 31, no. 6 (2013-06-25), S.1109-1114 |
| Datensatznummer |
250019055
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| Publikation (Nr.) |
 copernicus.org/angeo-31-1109-2013.pdf |
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| Zusammenfassung |
| We study the electron temperature distribution and the structure of the
current sheet along the magnetotail using simultaneous observations from THEMIS
spacecraft. We perform a statistical study of 40 crossings of the current
sheet when the three spacecraft THB, THC, and THD were distributed along the
tail in the vicinity of midnight with coordinates XB ∈ [−30
RE, −20 RE], XC ∈ [−20 RE, −15 RE], and XD ~
−10 RE. We obtain profiles of the average electron temperature
⟨Te⟩ and the average magnetic field ⟨Bz⟩
along the tail. Electron temperature and ⟨Bz⟩ increase
towards the Earth with almost the same rates (i.e., ratio ⟨Te⟩/⟨Bz⟩ ≈ 2 keV/7 nT is approximately
constant along the tail). We also use statistics of 102 crossings of the
current sheet from THB and THC to estimate dependence of Te and Bz
distributions on geomagnetic activity. The ratio ⟨Te ⟩/⟨Bz⟩ depends on geomagnetic activity only slightly. Additionally we
demonstrate that anisotropy of the electron temperature ⟨T∥/T⊥⟩ ≈ 1.1 is almost constant along the tail
for X ∈ [−30 RE, −10 RE]. |
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