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The Flux of Flux Ropes Embedded Within Magnetic Clouds Near 5 AU
Author(s) -
Zhao Yan,
Feng Hengqiang,
Liu Qiang,
Zhao Ake,
Zhao Guoqing,
Tian Zhanjun
Publication year - 2021
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1029/2020ja028594
Subject(s) - rope , flux (metallurgy) , magnetic cloud , magnetic flux , interplanetary spaceflight , physics , coronal mass ejection , azimuth , solar wind , astrophysics , magnetic field , astronomy , materials science , engineering , structural engineering , quantum mechanics , metallurgy
Abstract Magnetic clouds (MCs) are an important kind of interplanetary coronal mass ejections and generally treated as giant flux ropes. Previous researches indicates that the rope structure of MCs may be destructed as they move away from the solar surface. In this paper, we made a statistic study of the azimuthal flux of flux ropes embedded within MCs near 5 AU. The average azimuthal flux of the rope was estimated to be 2.42 × 10 12 W b / Au , less than 20% of that near 1 AU. The rope structure occupied from 30% to 100% of the magnetic cloud interval with an average of 69%. The results presented here indicate that the rope structure of MCs still can be efficiently destructed as they move out beyond 1 AU and treating them as flux ropes, at least beyond 1 AU, may not be appropriate.