文章基本信息

标题：Jovian electrons in the inner heliosphere
其他标题：Proposing a new source spectrum based on 30 years of measurements
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作者：A. Vogt ; B. Heber ; A. Kopp 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2018
卷号：613
DOI：10.1051/0004-6361/201731736
语种：English
出版社：EDP Sciences
摘要：Context.Since the Pioneer 10 flyby of Jupiter it has become well known that electrons of Jovian origin dominate the lower MeV range of charged energetic particles in the inner heliosphere.Aims.Because the Jovian source can be treated as point-like in numerical models, many attempts to investigate charged particle transport in the inner heliosphere have utilized Jovian electrons as test particles. The reliability of the derived parameters for convective and diffusive transport processes are therefore highly dependent on an accurate estimation of the Jovian source spectrum. In this study we aim to provide such an estimation.Methods.In this study we have proposed a new electron source spectrum, specified at the boundary of the Jovian magnetosphere, fitted to flyby measurements by Pioneer 10 andUlysses, with a spectral shape also in agreement with measurements at Earth’s orbit byUlysses, Voyager 1, ISEE and SOHO.Results.The proposed spectrum is consistent with all previous theoretical suggestions, but deviates considerably in the lower MeV range which was inaccessible to those studies.
关键词：Key wordsenconvectionastroparticle physicsSun: heliosphereinterplanetary mediummethods: numericaldiffusion