Evidence for global electron transportation into the jovian inner magnetosphere

K. Yoshioka, G. Murakami, A. Yamazaki, F. Tsuchiya, T. Kimura, M. Kagitani, T. Sakanoi, K. Uemizu, Y. Kasaba, I. Yoshikawa, M. Fujimoto

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Jupiters magnetosphere is a strong particle accelerator that contains ultrarelativistic electrons in its inner part. They are thought to be accelerated by whistler-mode waves excited by anisotropic hot electrons (>10 kiloelectron volts) injected from the outer magnetosphere. However, electron transportation in the inner magnetosphere is not well understood. By analyzing the extreme ultraviolet line emission from the inner magnetosphere, we show evidence for global inward transport of flux tubes containing hot plasma. High-spectral-resolution scanning observations of the lo plasma torus in the inner magnetosphere enable us to generate radial profiles of the hot electron fraction. It gradually decreases with decreasing radial distance, despite the short collisional time scale that should thermalize them rapidly. This indicates a fast and continuous resupply of hot electrons responsible for exciting the whistler-mode waves.

Original languageEnglish
Pages (from-to)1581-1584
Number of pages4
JournalScience
Volume345
Issue number6204
DOIs
Publication statusPublished - 2014 Sep 26

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Evidence for global electron transportation into the jovian inner magnetosphere'. Together they form a unique fingerprint.

  • Cite this