Diamagnetic Depression Observations at Saturn's magnetospheric cusp by the Cassini Spacecraft†
J. M. Jasinski,J. M. Jasinski,Chris S. Arridge,Andrew J. Coates,Andrew J. Coates,Geraint H. Jones,Geraint H. Jones,Nick Sergis,Michelle F. Thomsen,Norbert Krupp +9 more
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TL;DR: The magnetospheric cusp is a region where shocked solar wind plasma can enter a planetary magnetosphere, after magnetic reconnection has occurred at the dayside magnetopause or in the lobes as mentioned in this paper.
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Abstract: The magnetospheric cusp is a region where shocked solar wind plasma can enter a planetary magnetosphere, after magnetic reconnection has occurred at the dayside magnetopause or in the lobes. The dense plasma that enters the high-latitude magnetosphere creates diamagnetic effects whereby a depression is observed in the magnetic field. We present observations of the cusp events at Saturn's magnetosphere where these diamagnetic depressions are found. The data are subtracted from a magnetic field model, and the calculated magnetic pressure deficits are compared to the particle pressures. A high plasma pressure layer in the magnetosphere adjacent to the cusp is discovered to also depress the magnetic field, outside of the cusp. This layer is observed to contain energetic He++ (up to ∼100 keV) from the solar wind as well as heavy water group ions (W+) originating from the moon Enceladus. We also find a modest correlation of diamagnetic depression strength to solar wind dynamic pressure and velocity; however, unlike at Earth, there is no correlation found with He++ counts.
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Citations
Currents in Saturn's magnetosphere
John E. P. Connerney,Mario H. Acuña,Norman F. Ness +2 more
- 01 Jun 1983
TL;DR: In this paper, a model of the magnetospheric magnetic field of the planet Saturn was obtained from the Voyager 1 and 2 observations using the Z sub 3 zonal harmonic model.
137
Flux Transfer Events at a Reconnection-Suppressed Magnetopause: Cassini Observations at Saturn
J. M. Jasinski,Mojtaba Akhavan-Tafti,Weijie Sun,James A. Slavin,Andrew J. Coates,Stephen A. Fuselier,Stephen A. Fuselier,Nick Sergis,Neil Murphy +8 more
TL;DR: Flux transfer events (FTEs) are transient magnetic structures that are a result of reconnection occurring at the dayside magnetopause of a magnetosphere (e.g. Fear et al., 2008) as mentioned in this paper.
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Statistical properties of kinetic-scale magnetic holes in terrestrial space
Shutao Yao,Shutao Yao,Zongshun Yue,Quanqi Shi,Alexander W. Degeling,Huishan Fu,Anmin Tian,Hui Zhang,Andrew Vu,Ruilong Guo,Zhonghua Yao,Zhonghua Yao,Ji Liu,Qiugang Zong,Xu-Zhi Zhou,Jing-Huan Li,Wenya Li,Hongqiao Hu,Y. Y. Liu,Weijie Sun +19 more
- 20 Jan 2021
TL;DR: In this paper, the authors used data from the Magnetospheric Multiscale mission (MAGNUM) to investigate the formation of KSMHs in the magnetosheath at rates far above their occurrence in the solar wind.
Saturn's Open-Closed Field Line Boundary: A Cassini Electron Survey at Saturn's Magnetosphere
J. M. Jasinski,Chris S. Arridge,Alexander Bader,A. W. Smith,M. Felici,Joe Kinrade,Andrew J. Coates,Geraint H. Jones,Tom Nordheim,Lin Gilbert,A. Azari,Sarah V. Badman,Gabrielle Provan,Nick Sergis,Neil Murphy +14 more
TL;DR: The average configuration and structure of Saturn's magnetosphere in the nightside equatorial and high-latitude regions were investigated in this article, where the signal-to-noise ratio falls below 1, to identify regions in the magnetosphere where there is a significant depletion in the electron content.
Classification of Cassini’s Orbit Regions as Magnetosphere, Magnetosheath, and Solar Wind via Machine Learning
Kiley L. Yeakel,Jon Vandegriff,Tadhg M. Garton,Caitriona M. Jackman,George Clark,Sarah K. Vines,Andrew Smith,Peter Kollmann +7 more
TL;DR: Several machine learning algorithms and feature subsets from a variety of particle and magnetic field instruments on-board the Cassini spacecraft were explored for their utility in classifying orbit segments as magnetosphere, magnetosheath or solar wind as mentioned in this paper .
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TL;DR: In this article, the spatial distribution of the magnetic depression associated with the polar cusp, as derived from a large set of Polar magnetometer data taken in 1996-1998, was analyzed.
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Observation of electromagnetic ion cyclotron waves and hot plasma in the polar cusp
TL;DR: In this paper, narrow band magnetic field fluctuations were observed by VIKING near the apogee altitude of 13,500 km in the polar cusp region during a period of strong southward interplanetary magnetic field (IMF).
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On the Origin of High-Energy Particles in the Cusp Diamagnetic Cavity
TL;DR: In this paper, the authors analyzed Cluster magnetic field and plasma data during a high-altitude cusp crossing in 2003, which provided unique measurements of high energy particle properties both inside the DiaMagnetic Cavity (DMC) and surrounding magnetosheath.
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The effect of spacecraft radiation sources on electron moments from the Cassini CAPS electron spectrometer
Chris S. Arridge,L. K. Gilbert,Gethyn R. Lewis,Edward C. Sittler,Geraint H. Jones,Dhiren Kataria,Andrew J. Coates,D. T. Young +7 more
TL;DR: In this article, the authors quantitatively assess the effect of background radiation on numerically integrated electron moments and show that the presence of noise produces a saturation of the electron density and temperature at quasi-constant values.
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