Solar wind diamagnetic structures as a source of substorm-like disturbances

Parkhomov, V. A.; Бородкова, Н. Л.; Еселевич, В. Г.; Еселевич, М.; Дмитриев, А. В.; Chilikin, Vitaliy

doi:10.1016/j.jastp.2018.10.010

Cited by 15 publications

(12 citation statements)

References 19 publications

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“…it is approximately consistent with time scales of the above number density structures recorded at ≤ 0.5 AU [Stansby, Horbury, 2018]. Parkhomov et al [2017Parkhomov et al [ , 2018 have introduced the concept of diamagnetic structures (DS) for the quasistationary slow SW flowing in the streamer belt and chains. It has a broader meaning than that of diamagnetic plasmoids.…”

Section: Introductionsupporting

confidence: 69%

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Diamagnetic structures as a basis of quasi-stationary slow solar wind

Еселевич¹

2019

Solar-Terrestrial Physics

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The results presented in this review reflect the fundamentals of the modern understanding of the nature of the structure of the slow solar wind (SW) along the entire length from the Sun to the Earth's orbit. It is known that the source of the slow quasi-stationary SW on the Sun is the belt and the chains of coronal streamers The streamer belt encircles the entire Sun as a wave-like surface (skirt), representing a sequence of pairs of rays with increased brightness (plasma density) or two lines of rays located close to each other. Neutral line of the radial component of the solar global magnetic field goes along the belt between the rays of each of these pairs. The streamer belt extends in the heliosphere is as the heliospheric plasma sheet (HPS). Detailed analysis of data from Wind and IMP-8 satellites showed that HPS sections on the Earth orbit are registered as a sequence of diamagnetic tubes with high density plasma and low interplanetary magnetic field. They represent an extension of rays with increased brightness of the streamer belt near the Sun. Their angular size remains the same over the entire way from the Sun to the Earth's orbit. Each HPS diamagnetic tube has a fine internal structure on several scales, or fractality. In other words, diamagnetic tube is a set of nested diamagnetic tubes, whose angular size can vary by almost two orders of magnitude. These sequences of diamagnetic tubes that form the base of slow SW on the Earth's orbit has a more general name — diamagnetic structures (DS). In the final part of this article, a comparative analysis of several events was made, based on the results of this review. He made it possible to find out the morphology and nature of the origin of the new term “diamagnetic plasmoids” SW (local amplifications of plasma density), which appeared in several articles published during 2012–2018. The analysis carried out at the end of this article, for the first time, showed that the diamagnetic plasmoids SW are the small-scale component of the fractal diamagnetic structures of the slow SW, considered in this review.

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Section: Introductionsupporting

confidence: 69%

“…In what follows, instead of the term "diamagnetic tubes" we use a more general term "diamagnetic structures" (DS). It has been introduced and used for analyzing interaction of HPS parts with Earth's magnetosphere in [Parkhomov et al, 2018].…”

Section: Analyzing Stability Of Current At Boundaries Of Diamagnetic mentioning

confidence: 99%

Diamagnetic structures as a basis of quasi-stationary slow solar wind

Еселевич¹

2019

Solar-Terrestrial Physics

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“…В отсутствие спорадического СВ квазистационарный СВ может быть двух типов: быстрый и медленный. Источниками медленного квазистационарного СВ на Солнце являются пояс [Svalgaard et al, 1974] и цепочки стримеров Eselevich et al, 1999], или псевдостримеры . На орбите Земли медленный СВ характеризуется относительно небольшой скоростью V≈ 250-450 км/с по сравнению с квазистационарным быстрым СВ, истекающим из корональных дыр, максимальная скорость которого V~450-800 км/с Eselevich, Fainshtein, 1991.…”

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“…Один из двух перечисленных выше источников медленного СВ на поверхности Солнцапояс стримеровхарактеризуется следующей особенностью. Он разделяет области с противоположным направлением радиальной компоненты глобального магнитного поля [Svalgaard et al, 1974]. Это означает, что в основании пояса стримеров расположены арки магнитного поля, составляющие основу шлема стримера, по вершинам которого проходит нейтральная линия (НЛ) радиальной компоненты глобального магнитного поля Солнца [Eselevich et al, 1999].…”

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Diamagnetic Plasmoids as Part of Diamagnetic Structures of the Slow Solar Wind and Their Impact on Earth’s Magnetosphere

Parkhomov

Еселевич

et al. 2019

Solnechno-Zemnaya Fizika

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We have shown that diamagnetic structures (DSs), which form the basis of the slow quasi-stationary solar wind (SW), are observed in Earth’s orbit as a sequence of DSs of various scales. The analysis of this phenomenon indicates that diamagnetic plasmoids in SW, whose concept was introduced by Karlsson in 2015, are identical to small-scale DSs. We have found that the impact of a sequence of DSs in the slow SW on Earth’s magnetosphere causes an increase in geomagnetic activity. Isolated DSs generate short-term magnetic disturbances whose duration is approximately equal to the DS duration. Hence, a sequence of DSs can cause sawtooth substorms. We emphasize that the interaction of DS in the slow SW under northward interplanetary magnetic field can be associated with penetration of DS high-density plasma into the magnetosphere.

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