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Classifying Interplanetary Discontinuities Using Supervised Machine Learning
Earth and Space Science, 2023 Directional discontinuities (DDs) are defined as abrupt changes of the magnetic field orientation. We use observations from ESA's Cluster mission to compile a database of events: Four thousand two hundred and sixteen events are identified in January ...
Daniel Dumitru, Costel Munteanu
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The Astrophysical Journal, 2023 The discovery of very prominent magnetic kinks/switchbacks in the solar wind within 0.3 au has become a scientific highlight of the Parker Solar Probe (PSP) mission. This discovery points at the promising impact of small-scale solar activity on the inner
Chuanpeng Hou +5 more
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Mechanisms and Evolution of Geoeffective Large-Scale Plasma Jets in the Magnetosheath
Universe, 2021 Geoeffective magnetosheath plasma jets (those that interact with the magnetopause) are an important area of research and technology, since they affect the “space-weather” around the Earth.
Alexei V. Dmitriev +2 more
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Magnetic Discontinuities in the Inner Heliosphere: Do Intermediate Shocks Exist?
The Astrophysical Journal, 2023 Magnetic discontinuities are fundamental structures in space and laboratory plasmas where the changes in magnetic and velocity fields are constrained by Rankine–Hugoniot relations.
Y. Y. Liu +6 more
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Are Switchback Boundaries Observed by Parker Solar Probe Closed?
The Astrophysical Journal, 2023 Switchbacks are sudden and large deflections in the magnetic field that Parker Solar Probe frequently observes in the inner heliosphere. Their ubiquitous occurrence has prompted numerous studies to determine their nature and origin.
Nina Bizien +9 more
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A possible generation mechanism of interplanetary rotational discontinuities [PDF]
Journal of Geophysical Research: Space Physics, 2009 In the present paper, we first examine some interplanetary directional discontinuities with very small Bn/B (<0.1) using intraspacecraft timing method. It is found that the velocity and magnetic field fluctuations of these directional discontinuities satisfy the Walén relation.
C. C. Lin +5 more
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Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations
The Astrophysical Journal, 2023 The Helios 1 (H1) and Helios 2 (H2) spacecraft measured the solar winds at a distance between ∼0.3 and 1.0 au from the Sun. With increasing heliocentric distance ( r _h ), the plasma speed is found to increase at ∼34–40 km s ^−1 au ^−1 and the density ...
Rajkumar Hajra +5 more
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Failures of Minimum Variance Analysis in Diagnosing Planar Structures in Space
The Astrophysical Journal Supplement Series, 2023 Minimum variance analysis of the magnetic field (MVAB), among various techniques of planar structure analysis, is most widely used for its numerical simplicity and loose requirements for data.
Y. Y. Liu +5 more
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Maximum Aligned Directional Derivative (MADD) Technique for Planar Structure Analysis in Space
The Astrophysical Journal Supplement Series, 2023 Interplanetary discontinuities are the most common intermittent structures in the solar winds, whose jump conditions conform to the Rankine–Hugoniot relations. The identification and analysis of such planar structures rely on an accurate determination of
Y. Y. Liu +4 more
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Frontiers in Physics, 2022 Global magnetospheric effects resulting from the passage at Earth of large-scale structures have been well studied. The effects of common and short-term features, such as discontinuities and current sheets (CSs), have not been studied in the same depth ...
C. J. Farrugia +8 more
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