文章基本信息

标题：Bimodal distribution of the solar wind at 1 AU
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作者：C. Larrodera ; C. Cid
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2020
卷号：635
页码：1-5
DOI：10.1051/0004-6361/201937307
语种：English
出版社：EDP Sciences
摘要：Aims.Here we aim to separate the two main contributions of slow and fast solar wind that appear at 1 AU.Methods.The bi-Gaussian function is proposed as the probability distribution function of the two main components of the solar wind. The positions of the peaks of every simple Gaussian curve are associated with the typical values of every contribution to solar wind. We used the entire data set from the Advanced Composition Explorer (ACE) mission in an analysis of the data set as a whole and as yearly series. Solar cycle dependence is considered to provide more accurate results for the typical values of the different parameters.Results.The distribution of the solar wind at 1 AU is clearly bimodal, not only for velocity, but also for proton density, temperature and magnetic field. New typical values for the main parameters of the slow and fast components of the solar wind at 1 AU are proposed.
关键词：enSun: heliospheresolar wind