A radiation belt of energetic protons located between Saturn and its rings

E. Roussos, P. Kollmann, N. Krupp, A. Kotova, L. Regoli, C. Paranicas, D. G. Mitchell, S. M. Krimigis, D. Hamilton, P. Brandt, J. Carbary, S. Christon, K. Dialynas, I. Dandouras, M. E. Hill, W. H. Ip, G. H. Jones, S. Livi, B. H. Mauk, B. PalmaertsE. C. Roelof, A. Rymer, N. Sergis, H. T. Smith

研究成果: 雜誌貢獻期刊論文同行評審

24 引文 斯高帕斯(Scopus)

摘要

Saturn has a sufficiently strong dipole magnetic field to trap high-energy charged particles and form radiation belts, which have been observed outside its rings. Whether stable radiation belts exist near the planet and inward of the rings was previously unknown. The Cassini spacecraft's Magnetosphere Imaging Instrument obtained measurements of a radiation belt that lies just above Saturn's dense atmosphere and is decoupled from the rest of the magnetosphere by the planet's A- to C-rings. The belt extends across the D-ring and comprises protons produced through cosmic ray albedo neutron decay and multiple charge-exchange reactions. These protons are lost to atmospheric neutrals and D-ring dust. Strong proton depletions that map onto features on the D-ring indicate a highly structured and diverse dust environment near Saturn.

原文???core.languages.en_GB???
文章編號47
期刊Science
362
發行號6410
DOIs
出版狀態已出版 - 5 10月 2018

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