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| Titel |
Proton/electron temperature ratio in the magnetotail |
| VerfasserIn |
A. V. Artemyev, W. Baumjohann, A. A. Petrukovich, R. Nakamura, I. Dandouras, A. Fazakerley |
| 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 ; 29, no. 12 ; Nr. 29, no. 12 (2011-12-15), S.2253-2257 |
| Datensatznummer |
250017143
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| Publikation (Nr.) |
 copernicus.org/angeo-29-2253-2011.pdf |
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| Zusammenfassung |
| We study the temperature ratio of protons and electrons based on statistics
of Cluster observations in the Earth's magnetotail from 2001 to 2004. During
these years, from June to November, the Cluster spacecraft visited the plasma
sheet at the distance r~−19 RE. We use proton and electron moments
collected in the central region of the plasma sheet (|Z|<5 RE). We find an
average ratio of proton and electron temperatures ⟨Tp/Te ⟩
≈ 3.5. The dependence of Tp on Te can be approximated by the
power-law function: Tp ≈ 11Te0.62, where Tp and Te are
measured in MK. A previous reported ratio ⟨Tp/Te ⟩ ~ 7 is
limited to small electron temperatures <20 MK. The observations with the
high electron temperature correspond to smaller values of the electron
density and larger values of the proton and electron bulk velocities. A
correlation between Te and curlometer current density is not found. |
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