Waves in the innermost open boundary layer formed by dayside magnetopause reconnection

Uchino, Haruto; Kurita, Satoshi; Harada, Yuki; Machida, S.; Angelopoulos, V.

doi:10.1002/2016ja023300

Cited by 15 publications

(16 citation statements)

References 56 publications

(73 reference statements)

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“…Figure 7b is an example diagram of the wave frequency and wave number (ω-k diagram) and linear growth rate as a function of frequency and wave number on the electromagnetic ion cyclotron (EMIC) waves. This plug-in package has been used in various studies of plasma waves (Uchino et al 2017;Shoji and Omura 2017) as a function of SPEDAS.…”

Section: Data Analysis Tools For the Erg Projectmentioning

confidence: 99%

The ERG Science Center

Miyoshi

Hori

Motomizu

et al. 2018

Earth Planets Space

151

156

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The Exploration of energization and Radiation in Geospace (ERG) Science Center serves as a hub of the ERG project, providing data files in a common format and developing the space physics environment data analysis software and plug-ins for data analysis. The Science Center also develops observation plans for the ERG (Arase) satellite according to the science strategy of the project. Conjugate observations with other satellites and ground-based observations are also planned. These tasks contribute to the ERG project by achieving quick analysis and well-organized conjugate ERG satellite and ground-based observations. © The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Section: Data Analysis Tools For the Erg Projectmentioning

confidence: 99%

The ERG Science Center

Miyoshi

Hori

Motomizu

et al. 2018

Earth Planets Space

151

156

View full text Add to dashboard Cite

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“…The end result is that the plasma is unstable to the generation of various waves which are often found in spacecraft observations. Examples include beam and loss cone driven whistler waves (Graham, Vaivads, et al., 2016; Uchino et al., 2017), electron holes (Farrell et al., 2002; Graham et al., 2015; Holmes et al., 2019), Langmuir waves (Vaivads et al., 2004; Wilder et al., 2016; Zhou et al., 2016), ion acoustic waves (Uchino et al., 2017), and electron acoustic waves (Ergun, Holmes, et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

Large Amplitude Electrostatic Proton Plasma Frequency Waves in the Magnetospheric Separatrix and Outflow Regions During Magnetic Reconnection

Steinvall

Khotyaintsev

Graham

et al. 2021

Geophysical Research Letters

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We report Magnetospheric Multiscale observations of large amplitude, parallel, electrostatic, proton plasma frequency waves on the magnetospheric side of the reconnecting magnetopause. The waves are often found in the magnetospheric separatrix region and in the outflow near the magnetospheric ion edge. Statistical results from five months of data show that these waves are closely tied to the presence of cold (typically tens of eV) ions, found for 88% of waves near the separatrix region, and that plasma properties are consistent with ion acoustic wavegrowth. We analyze one wave event in detail, concluding that the wave is ion acoustic. We provide a simple explanation for the mechanisms leading to the development of the ion acoustic instability. These waves can be important for separatrix dynamics by heating the cold ion component and providing a mechanism to damp the kinetic Alfvén waves propagating away from the reconnection site.

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“…This modification of the Hall physics due to cold ions has been studied through investigating the generalized Ohm's law using observations from the Cluster (Toledo‐Redondo et al, ) and Magnetospheric Multiscale (André et al, ) spacecraft. Lower hybrid waves (Graham et al, ), ion acoustic waves (Uchino et al, ), and electron acoustic waves (Ergun, Holmes, et al, ) can be generated at the magnetopause boundary layer due to the interaction of magnetosheath and cold magnetospheric plasmas. Thus, cold ions can affect the magnetic reconnection in both the fluid and kinetic aspects.…”

Section: Introductionmentioning

confidence: 99%

Cold Ionospheric Ions in the Magnetic Reconnection Outflow Region

André

Khotyaintsev

et al. 2017

JGR Space Physics

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Magnetosheath plasma usually determines properties of asymmetric magnetic reconnection at the subsolar region of Earth's magnetopause. However, cold plasma that originated from the ionosphere can also reach the magnetopause and modify the kinetic physics of asymmetric reconnection. We present a magnetopause crossing with high‐density (10–60 cm−3) cold ions and ongoing reconnection from the observation of the Magnetospheric Multiscale (MMS) spacecraft. The magnetopause crossing is estimated to be 300 ion inertial lengths south of the X line. Two distinct ion populations are observed on the magnetosheath edge of the ion jet. One population with high parallel velocities (200–300 km/s) is identified to be cold ion beams, and the other population is the magnetosheath ions. In the deHoffman‐Teller frame, the field‐aligned magnetosheath ions are Alfvénic and move toward the jet region, while the field‐aligned cold ion beams move toward the magnetosheath boundary layer, with much lower speeds. These cold ion beams are suggested to be from the cold ions entering the jet close to the X line. This is the first observation of the cold ionospheric ions in the reconnection outflow region, including the reconnection jet and the magnetosheath boundary layer.

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Waves in the innermost open boundary layer formed by dayside magnetopause reconnection

Cited by 15 publications

References 56 publications

The ERG Science Center

The ERG Science Center

Large Amplitude Electrostatic Proton Plasma Frequency Waves in the Magnetospheric Separatrix and Outflow Regions During Magnetic Reconnection

Cold Ionospheric Ions in the Magnetic Reconnection Outflow Region

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