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1,511 results on '"Torbert, R. B."'

151. A Vortical Dawn Flank Boundary Layer for Near-Radial IMF: Wind Observations on 24 October 2001

Author

Farrugia, C. J, Gratton, F. T, Gnavi, G, Torbert, R. B, and Wilson, Lynn B., III

Subjects
Plasma Physics, Solar Physics, Geophysics
Abstract

We present an example of a boundary layer tailward of the dawn terminator which is entirely populated by rolled-up flow vortices. Observations were made by Wind on 24 October 2001 as the spacecraft moved across the region at the X plane approximately equal to −13 Earth radii. Interplanetary conditions were steady with a near-radial interplanetary magnetic field (IMF). Approximately 15 vortices were observed over the 1.5 hours duration of Wind's crossing, each lasting approximately 5 min. The rolling up is inferred from the presence of a hot tenuous plasma being accelerated to speeds higher than in the adjoining magnetosheath, a circumstance which has been shown to be a reliable signature of this in single-spacecraft observations. A blob of cold dense plasma was entrained in each vortex, at whose leading edge abrupt polarity changes of field and velocity components at current sheets were regularly observed. In the frame of the average boundary layer velocity, the dense blobs were moving predominantly sunward and their scale size along the X plane was approximately 7.4 Earth radii. Inquiring into the generation mechanism of the vortices, we analyze the stability of the boundary layer to sheared flows using compressible magnetohydrodynamic Kelvin-Helmholtz theory with continuous profiles for the physical quantities. We input parameters from (i) the exact theory of magnetosheath flow under aligned solar wind field and flow vectors near the terminator and (ii) the Wind data. It is shown that the configuration is indeed Kelvin-Helmholtz (KH) unstable. This is the first reported example of KH-unstable waves at the magnetopause under a radial IMF.

Published
2014
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152. Sequential Observations of Flux Transfer Events, Poleward-Moving Auroral Forms, and Polar Cap Patches

Author

Hwang, K. -J, Nishimura, Y., Coster, A. J., Gillies, R. G., Fear, R. C., Fuselier, S. A., Petrinec, S. M., Burch, J. L., Dokgo, K., Sibeck, D. G., Giles, B. L., Russell, C. T., Strangeway, R. J., Gershman, D. J., Pollock, C. J., Khotyaintsev, Yuri V., Torbert, R. B., Ergun, R. E., Moen, J. I., Clausen, L. B., Hwang, K. -J, Nishimura, Y., Coster, A. J., Gillies, R. G., Fear, R. C., Fuselier, S. A., Petrinec, S. M., Burch, J. L., Dokgo, K., Sibeck, D. G., Giles, B. L., Russell, C. T., Strangeway, R. J., Gershman, D. J., Pollock, C. J., Khotyaintsev, Yuri V., Torbert, R. B., Ergun, R. E., Moen, J. I., and Clausen, L. B.

Abstract

We report the observation of solar wind-magnetosphere-ionosphere interactions using a series of flux transfer events (FTEs) observed by Magnetospheric MultiScale (MMS) mission located near the dayside magnetopause on 18 December 2017. The FTEs were observed to propagate duskward and either southward or slightly northward, as predicted under duskward and southward interplanetary magnetic field (IMF). The Cooling model also predicted a significant dawnward propagation of northward-moving FTEs. Near the MMS footprint, a series of poleward-moving auroral forms (PMAFs) occurred almost simultaneously with those FTEs. They propagated poleward and westward, consistent with the modeled FTE propagation. The intervals between FTEs, relatively consistent with those between PMAFs, strongly suggest a one-to-one correspondence between the dayside transients and ionospheric responses. The FTEs embedded in continuous reconnection observed by MMS and corresponding PMAFs individually occurred during persistent auroral activity recorded by an all-sky imager strongly indicate that those FTEs/PMAFs resulted from the temporal modulation of the reconnection rate during continuous reconnection. With the decay of the PMAFs associated with the FTEs, patch-like plasma density enhancements were detected to form and propagate poleward and then dawnward. Propagation to the dawn was also suggested by the Super Dual Auroral Radar Network (SuperDARN) convection and Global Positioning System (GPS) total electron content data. We relate the temporal variation of the driving solar-wind and magnetospheric mechanism to that of the high-latitude and polar ionospheric responses and estimate the response time.

Published
2020
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153. Lower-Hybrid Drift Waves Driving Electron Nongyrotropic Heating and Vortical Flows in a Magnetic Reconnection Layer

Author

Chen, L-J, Wang, S., Le Contel, O., Rager, A., Hesse, M., Drake, J., Dorelli, J., Ng, J., Bessho, N., Graham, Daniel B., Wilson, Lynn B., III, Moore, T., Giles, B., Paterson, W., Lavraud, B., Genestreti, K., Nakamura, R., Khotyaintsev, Yuri V., Ergun, R. E., Torbert, R. B., Burch, J., Pollock, C., Russell, C. T., Lindqvist, P-A, Avanov, L., Chen, L-J, Wang, S., Le Contel, O., Rager, A., Hesse, M., Drake, J., Dorelli, J., Ng, J., Bessho, N., Graham, Daniel B., Wilson, Lynn B., III, Moore, T., Giles, B., Paterson, W., Lavraud, B., Genestreti, K., Nakamura, R., Khotyaintsev, Yuri V., Ergun, R. E., Torbert, R. B., Burch, J., Pollock, C., Russell, C. T., Lindqvist, P-A, and Avanov, L.

Abstract

We report measurements of lower-hybrid drift waves driving electron heating and vortical flows in an electron-scale reconnection layer under a guide field. Electrons accelerated by the electrostatic potential of the waves exhibit perpendicular and nongyrotropic heating. The vortical flows generate magnetic field perturbations comparable to the guide field magnitude. The measurements reveal a new regime of electron-wave interaction and how this interaction modifies the electron dynamics in the reconnection layer.

Published
2020
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154. Statistics of Reconnecting Current Sheets in the Transition Region of Earth's Bow Shock

Author

Gingell, I., Schwartz, S. J., Eastwood, J. P., Stawarz, J. E., Burch, J. L., Ergun, R. E., Fuselier, S. A., Gershman, D. J., Giles, B. L., Khotyaintsev, Yuri V., Lavraud, B., Lindqvist, P. -A, Paterson, W. R., Phan, T. D., Russell, C. T., Strangeway, R. J., Torbert, R. B., Wilder, F., Gingell, I., Schwartz, S. J., Eastwood, J. P., Stawarz, J. E., Burch, J. L., Ergun, R. E., Fuselier, S. A., Gershman, D. J., Giles, B. L., Khotyaintsev, Yuri V., Lavraud, B., Lindqvist, P. -A, Paterson, W. R., Phan, T. D., Russell, C. T., Strangeway, R. J., Torbert, R. B., and Wilder, F.

Abstract

We have conducted a comprehensive survey of burst mode observations of Earth's bow shock by the Magnetospheric Multiscale mission to identify and characterize current sheets associated with collisionless shocks, with a focus on those containing fast electron outflows, a likely signature of magnetic reconnection. The survey demonstrates that these thin current sheets are observed within the transition region of approximately 40% of shocks within the burst mode data set of Magnetospheric Multiscale. With only small apparent bias toward quasi-parallel shock orientations and high Alfven Mach numbers, the results suggest that reconnection at shocks is a universal process, occurring across all shock orientations and Mach numbers. On examining the distributions of current sheet properties, we find no correlation between distance from the shock, sheet width, or electron jet speed, though the relationship between electron and ion jet speed supports expectations of electron-only reconnection in the region. Furthermore, we find that robust heating statistics are not separable from background fluctuations, and thus, the primary consequence of reconnection at shocks is in relaxing the topology of the disordered magnetic field in the transition region.

Published
2020
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155. Magnetic Reconnection Inside a Flux Rope Induced by Kelvin-Helmholtz Vortices

Author

Hwang, K-J, Dokgo, K., Choi, E., Burch, J. L., Sibeck, D. G., Giles, B. L., Hasegawa, H., Fu, H. S., Liu, Y., Wang, Z., Nakamura, T. K. M., Ma, X., Fear, R. C., Khotyaintsev, Yuri V., Graham, Daniel B., Shi, Q. Q., Escoubet, C. P., Gershman, D. J., Paterson, W. R., Pollock, C. J., Ergun, R. E., Torbert, R. B., Dorelli, J. C., Avanov, L., Russell, C. T., Strangeway, R. J., Hwang, K-J, Dokgo, K., Choi, E., Burch, J. L., Sibeck, D. G., Giles, B. L., Hasegawa, H., Fu, H. S., Liu, Y., Wang, Z., Nakamura, T. K. M., Ma, X., Fear, R. C., Khotyaintsev, Yuri V., Graham, Daniel B., Shi, Q. Q., Escoubet, C. P., Gershman, D. J., Paterson, W. R., Pollock, C. J., Ergun, R. E., Torbert, R. B., Dorelli, J. C., Avanov, L., Russell, C. T., and Strangeway, R. J.

Abstract

On 5 May 2017, MMS observed a crater-type flux rope on the dawnside tailward magnetopause with fluctuations. The boundary-normal analysis shows that the fluctuations can be attributed to nonlinear Kelvin-Helmholtz (KH) waves. Reconnection signatures such as flow reversals and Joule dissipation were identified at the leading and trailing edges of the flux rope. In particular, strong northward electron jets observed at the trailing edge indicated midlatitude reconnection associated with the 3-D structure of the KH vortex. The scale size of the flux rope, together with reconnection signatures, strongly supports the interpretation that the flux rope was generated locally by KH vortex-induced reconnection. The center of the flux rope also displayed signatures of guide-field reconnection (out-of-plane electron jets, parallel electron heating, and Joule dissipation). These signatures indicate that an interface between two interlinked flux tubes was undergoing interaction, causing a local magnetic depression, resulting in an M-shaped crater flux rope, as supported by reconstruction.

Published
2020
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156. Electron Heating by Debye-Scale Turbulence in Guide-Field Reconnection

Author

Khotyaintsev, Yuri V., Graham, Daniel B., Steinvall, Konrad, Alm, Love, Vaivads, A., Johlander, A., Norgren, C., Li, W., Divin, A., Fu, H. S., Hwang, K-J, Burch, J. L., Ahmadi, N., Le Contel, O., Gershman, D. J., Russell, C. T., Torbert, R. B., Khotyaintsev, Yuri V., Graham, Daniel B., Steinvall, Konrad, Alm, Love, Vaivads, A., Johlander, A., Norgren, C., Li, W., Divin, A., Fu, H. S., Hwang, K-J, Burch, J. L., Ahmadi, N., Le Contel, O., Gershman, D. J., Russell, C. T., and Torbert, R. B.

Abstract

We report electrostatic Debye-scale turbulence developing within the diffusion region of asymmetric magnetopause reconnection with amoderate guide field using observations by the Magnetospheric Multiscale mission. We show that Buneman waves and beam modes cause efficient and fast thermalization of the reconnection electron jet by irreversible phase mixing, during which the jet kinetic energy is transferred into thermal energy. Our results show that the reconnection diffusion region in the presence of a moderate guide field is highly turbulent, and that electrostatic turbulence plays an important role in electron heating.

Published
2020
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157. Energy Flux Densities near the Electron Dissipation Region in Asymmetric Magnetopause Reconnection

Author

Eastwood, J. P., Goldman, M. , V, Phan, T. D., Stawarz, J. E., Cassak, P. A., Drake, J. F., Newman, D., Lavraud, B., Shay, M. A., Ergun, R. E., Burch, J. L., Gershman, D. J., Giles, B. L., Lindqvist, Per-Arne, Torbert, R. B., Strangeway, R. J., Russell, C. T., Eastwood, J. P., Goldman, M. , V, Phan, T. D., Stawarz, J. E., Cassak, P. A., Drake, J. F., Newman, D., Lavraud, B., Shay, M. A., Ergun, R. E., Burch, J. L., Gershman, D. J., Giles, B. L., Lindqvist, Per-Arne, Torbert, R. B., Strangeway, R. J., and Russell, C. T.

Abstract

Magnetic reconnection is of fundamental importance to plasmas because of its role in releasing and repartitioning stored magnetic energy. Previous results suggest that this energy is predominantly released as ion enthalpy flux along the reconnection outflow. Using Magnetospheric Multiscale data we find the existence of very significant electron energy flux densities in the vicinity of the magnetopause electron dissipation region, orthogonal to the ion energy outflow. These may significantly impact models of electron transport, wave generation, and particle acceleration., QC 20210125

Published
2020
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158. Observations of Particle Acceleration in Magnetic Reconnection-driven Turbulence

Author

Ergun, R. E., Ahmadi, N., Kromyda, L., Schwartz, S. J., Chasapis, A., Hoilijoki, S., Wilder, F. D., Stawarz, J. E., Goodrich, K. A., Turner, D. L., Cohen, I. J., Bingham, S. T., Holmes, J. C., Nakamura, R., Pucci, F., Torbert, R. B., Burch, J. L., Lindqvist, Per-Arne, Strangeway, R. J., Le Contel, O., Giles, B. L., Ergun, R. E., Ahmadi, N., Kromyda, L., Schwartz, S. J., Chasapis, A., Hoilijoki, S., Wilder, F. D., Stawarz, J. E., Goodrich, K. A., Turner, D. L., Cohen, I. J., Bingham, S. T., Holmes, J. C., Nakamura, R., Pucci, F., Torbert, R. B., Burch, J. L., Lindqvist, Per-Arne, Strangeway, R. J., Le Contel, O., and Giles, B. L.

Abstract

The Magnetospheric Multiscale Mission observes, in detail, charged particle heating and substantial nonthermal acceleration in a region of strong turbulence (vertical bar delta B vertical bar/vertical bar B vertical bar similar to 1, where B is the magnetic field) that surrounds a magnetic reconnection X-line. Magnetic reconnection enables magnetic field annihilation in a volume that far exceeds that of the diffusion region. The formidable magnetic field annihilation breaks into strong, intermittent turbulence with magnetic field energy as the driver. The strong, intermittent turbulence appears to generate the necessary conditions for nonthermal acceleration. It creates intense, localized currents (J) and unusually large-amplitude electric fields (E). The combination of turbulence-generated E and J results in a significant net positive mean of J center dot E, which signifies particle energization. Ion and electron heating rates are such that they experience a fourfold increase from their initial temperature. Importantly, the strong turbulence also generates magnetic holes or depletions in vertical bar B vertical bar that can trap particles. Trapping considerably increases the dwell time of a subset of particles in the turbulent region, which results in significant nonthermal particle acceleration. The direct observation of strong turbulence that is enabled by magnetic reconnection with nonthermal particle acceleration has far-reaching implications, since turbulence in plasmas is pervasive and may occupy significant volumes of the interstellar medium and intergalactic space. For example, strong turbulence from magnetic field annihilation in the supernova nebulae may dominate large volumes. As such, this observed energization process could plausibly contribute to the supply and development of the cosmic-ray spectrum., QC 20201126

Published
2020
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159. Observation of Energy Conversion Near the X-line in Asymmetric Guide-field Reconnection

Author

Xu, J., Peng, F. Z., Russell, C. T., Giles, B., Lindqvist, Per-Arne, Torbert, R. B., Ergun, R. E., Burch, J. L., Xu, J., Peng, F. Z., Russell, C. T., Giles, B., Lindqvist, Per-Arne, Torbert, R. B., Ergun, R. E., and Burch, J. L.

Abstract

With high-resolution data of the recently launched Magnetospheric Multiscale mission, the present study reports an asymmetric guide-field reconnection at the dayside magnetopause, which has a density asymmetry N-MSP/N-MSH similar to 15 on the two sides of the current sheet and a guide field B-g similar to 1.4B(L, MSH) in the out-of-plane direction, exhibiting all the two-fluid features including Alfvenic plasma jets and Hall field systems. Using the First Order Taylor Expansion method, we identify the X-line of this reconnection. Different from previous observations, the energy conversion dominantly occurs sunward of the X-line, while the local waves arise simultaneously. The qualitative analysis about the electron energization in this reconnection is proposed, suggesting that the guide field may play an important role in modifying the location where the energy conversion occurs together with the electric field near the X-line., QC 20200616

Published
2020
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160. Magnetotail Current Sheet Prior to Magnetic Reconnection

Author

Alexandrova, Alexandra, Retino, A., Le Contel, Olivier, Divin, A. V., Strangeway, R. J., Plaschke, F., Gershman, D. J., Giles, B. L., Lindqvist, P. A., Khotyaintsev, Y., Ergun, R., Fuselier, S. A., Nakamura, R., Argall, M. R., Fischer, D., Torbert, R. B., Burch, J. L., Laboratoire de Physique des Plasmas (LPP), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and RETINO, Alessandro

Subjects
ASTROPHYSICS, MAGNETOSPHERIC PHYSICS, AND ASTRONOMY, SPACE PLASMA PHYSICS, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 2744 Magnetotail, 7526 Magnetic reconnection, 7835 Magnetic reconnection, 2723 Magnetic reconnection, Physics::Space Physics, SOLAR PHYSICS, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Abstract

International audience; The onset of magnetic reconnection is one of the crucial and still poorly understood problems. The Magnetospheric Multiscale (MMS) mission provides a unique opportunity for the long-term monitoring the Earth's magnetotail current sheet prior to and during reconnection activity. Using MMS observations of a number of reconnection events in the magnetotail we investigate how the spatial current density profile across the current sheet varies in time before reconnection is initiated. In addition, we study waves in the current sheet on different scales. These waves may help us understand the role of MHD and kinetic instabilities during current sheet breaking.

Published
2019

161. A Statistical Study of Slow-Mode Shocks Observed by MMS in the Dayside Magnetopause

Author

Walia, N. K., Pollock, C. J., Giles, B. L., Moore, T. E., Torbert, R. B., Russell, C. T., Burch, J. L., Seki, Kanako, Hoshino, Masahiro, Amano, Takanobu, Kitamura, Naritoshi, Saito, Yoshifumi, and Yokota, Shoichiro

Subjects
Physics, Geophysics, 010504 meteorology & atmospheric sciences, 0103 physical sciences, Mode (statistics), General Earth and Planetary Sciences, Magnetopause, Magnetic reconnection, 010303 astronomy & astrophysics, 01 natural sciences, 0105 earth and related environmental sciences, Computational physics
Abstract

著者人数: 13名, Accepted: 2018-05-14, 資料番号: SA1180024000

Published
2018

163. The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP

Author

Kletzing, C. A., primary, Kurth, W. S., additional, Acuna, M., additional, MacDowall, R. J., additional, Torbert, R. B., additional, Averkamp, T., additional, Bodet, D., additional, Bounds, S. R., additional, Chutter, M., additional, Connerney, J., additional, Crawford, D., additional, Dolan, J. S., additional, Dvorsky, R., additional, Hospodarsky, G. B., additional, Howard, J., additional, Jordanova, V., additional, Johnson, R. A., additional, Kirchner, D. L., additional, Mokrzycki, B., additional, Needell, G., additional, Odom, J., additional, Mark, D., additional, Pfaff, R., additional, Phillips, J. R., additional, Piker, C. W., additional, Remington, S. L., additional, Rowland, D., additional, Santolik, O., additional, Schnurr, R., additional, Sheppard, D., additional, Smith, C. W., additional, Thorne, R. M., additional, and Tyler, J., additional

Published
2013
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165. Erratum to: The Electron Drift Instrument for MMS

Author

Torbert, R. B., Vaith, H., Granoff, M., Widholm, M., Gaidos, J. A., Briggs, B. H., Dors, I. G., Chutter, M. W., Macri, J., Argall, M., Bodet, D., Needell, J., Steller, M. B., Baumjohann, W., Nakamura, R., Plaschke, F., Ottacher, H., Hasiba, J., Hofmann, K., Kletzing, C. A., Bounds, S. R., Dvorsky, R. T., Sigsbee, K., and Kooi, V.

Published
2016
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166. Lower Hybrid Drift Waves and Electromagnetic Electron Space-Phase Holes Associated With Dipolarization Fronts and Field-Aligned Currents Observed by the Magnetospheric Multiscale Mission During a Substorm

Author

Le, Contel O., Breuillard, H., Argall, M. R., Graham, D. B., Fischer, D., Retino, A., Berthomier, M., Pottelette, R., Mirioni, L., Chust, T., Wilder, F. D., Gershman, D. J., Varsani, A., Lindqvist, P. -A., Khotyaintsev, Yu. V., Norgren, C., Ergun, R. E., Goodrich, K. A., Burch, J. L., Torbert, R. B., Needell, J., Chutter, M., Rau, D., Dors, I., Russell, C. T., Magnes, W., Strangeway, R. J., Bromund, K. R., Wei, H. Y., Plaschke, F., Anderson, B. J., Le, G., Moore, T. E., Giles, B. L., Paterson, W. R., Pollock, C. J., Dorelli, J. C., Avanov, L. A., Lavraud, B., Fuselier, S. A., Mauk, B. H., Cohen, I. J., Turner, D. L., Fennell, J. F., Leonard, T., Jaynes, A. N., Nakamura, Rumi, and Saito, Yoshifumi

Abstract

著者人数: 48名, Accepted: 2017-10-10, 資料番号: SA1170207000

Published
2017

169. Comparative Analysis of the Various Generalized Ohm's Law Terms in Magnetosheath Turbulence as Observed by Magnetospheric Multiscale

Author

Stawarz, J. E., primary, Matteini, L., additional, Parashar, T. N., additional, Franci, L., additional, Eastwood, J. P., additional, Gonzalez, C. A., additional, Gingell, I. L., additional, Burch, J. L., additional, Ergun, R. E., additional, Ahmadi, N., additional, Giles, B. L., additional, Gershman, D. J., additional, Le Contel, O., additional, Lindqvist, P.‐A., additional, Russell, C. T., additional, Strangeway, R. J., additional, and Torbert, R. B., additional

Published
2021
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170. Energy Flux Densities near the Electron Dissipation Region in Asymmetric Magnetopause Reconnection

Author

Eastwood, J. P., primary, Goldman, M. V., additional, Phan, T. D., additional, Stawarz, J. E., additional, Cassak, P. A., additional, Drake, J. F., additional, Newman, D., additional, Lavraud, B., additional, Shay, M. A., additional, Ergun, R. E., additional, Burch, J. L., additional, Gershman, D. J., additional, Giles, B. L., additional, Lindqvist, P. A., additional, Torbert, R. B., additional, Strangeway, R. J., additional, and Russell, C. T., additional

Published
2020
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175. Multiscale Coupling During Magnetopause Reconnection: Interface Between the Electron and Ion Diffusion Regions

Author

Genestreti, K. J., primary, Liu, Y.‐H., additional, Phan, T.‐D., additional, Denton, R. E., additional, Torbert, R. B., additional, Burch, J. L., additional, Webster, J. M., additional, Wang, S., additional, Trattner, K. J., additional, Argall, M. R., additional, Chen, L.‐J., additional, Fuselier, S. A., additional, Ahmadi, N., additional, Ergun, R. E., additional, Giles, B. L., additional, Russell, C. T., additional, Strangeway, R. J., additional, and Eriksson, S., additional

Published
2020
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177. Electron Inflow Velocities and Reconnection Rates at Earth's Magnetopause and Magnetosheath

Author

Burch, J. L., primary, Webster, J. M., additional, Hesse, M., additional, Genestreti, K. J., additional, Denton, R. E., additional, Phan, T. D., additional, Hasegawa, H., additional, Cassak, P. A., additional, Torbert, R. B., additional, Giles, B. L., additional, Gershman, D. J., additional, Ergun, R. E., additional, Russell, C. T., additional, Strangeway, R. J., additional, Le Contel, O., additional, Pritchard, K. R., additional, Marshall, A. T., additional, Hwang, K.‐J., additional, Dokgo, K., additional, Fuselier, S. A., additional, Chen, L.‐J., additional, Wang, S., additional, Swisdak, M., additional, Drake, J. F., additional, Argall, M. R., additional, Trattner, K. J., additional, Yamada, M., additional, and Paschmann, G., additional

Published
2020
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178. Particle Acceleration in Strong Turbulence in the Earth’s Magnetotail

Author

Ergun, R. E., primary, Ahmadi, N., additional, Kromyda, L., additional, Schwartz, S. J., additional, Chasapis, A., additional, Hoilijoki, S., additional, Wilder, F. D., additional, Cassak, P. A., additional, Stawarz, J. E., additional, Goodrich, K. A., additional, Turner, D. L., additional, Pucci, F., additional, Pouquet, A., additional, Matthaeus, W. H., additional, Drake, J. F., additional, Hesse, M., additional, Shay, M. A., additional, Torbert, R. B., additional, and Burch, J. L., additional

Published
2020
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179. Observations of Particle Acceleration in Magnetic Reconnection–driven Turbulence

Author

Ergun, R. E., primary, Ahmadi, N., additional, Kromyda, L., additional, Schwartz, S. J., additional, Chasapis, A., additional, Hoilijoki, S., additional, Wilder, F. D., additional, Stawarz, J. E., additional, Goodrich, K. A., additional, Turner, D. L., additional, Cohen, I. J., additional, Bingham, S. T., additional, Holmes, J. C., additional, Nakamura, R., additional, Pucci, F., additional, Torbert, R. B., additional, Burch, J. L., additional, Lindqvist, P.-A., additional, Strangeway, R. J., additional, Le Contel, O., additional, and Giles, B. L., additional

Published
2020
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181. Lower-Hybrid Drift Waves Driving Electron Nongyrotropic Heating and Vortical Flows in a Magnetic Reconnection Layer

Author

Chen, L.-J., primary, Wang, S., additional, Le Contel, O., additional, Rager, A., additional, Hesse, M., additional, Drake, J., additional, Dorelli, J., additional, Ng, J., additional, Bessho, N., additional, Graham, D., additional, Wilson, Lynn B., additional, Moore, T., additional, Giles, B., additional, Paterson, W., additional, Lavraud, B., additional, Genestreti, K., additional, Nakamura, R., additional, Khotyaintsev, Yu. V., additional, Ergun, R. E., additional, Torbert, R. B., additional, Burch, J., additional, Pollock, C., additional, Russell, C. T., additional, Lindqvist, P.-A., additional, and Avanov, L., additional

Published
2020
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182. Characteristics of Minor Ions and Electrons in Flux Transfer Events Observed by the Magnetospheric Multiscale Mission

Author

Petrinec, S. M., primary, Burch, J. L., additional, Chandler, M., additional, Farrugia, C. J., additional, Fuselier, S. A., additional, Giles, B. L., additional, Gomez, R. G., additional, Mukherjee, J., additional, Paterson, W. R., additional, Russell, C. T., additional, Sibeck, D. G., additional, Strangeway, R. J., additional, Torbert, R. B., additional, Trattner, K. J., additional, Vines, S. K., additional, and Zhao, C., additional

Published
2020
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185. Sequential Observations of Flux Transfer Events, Poleward‐Moving Auroral Forms, and Polar Cap Patches

Author

Hwang, K.‐J., primary, Nishimura, Y., additional, Coster, A. J., additional, Gillies, R. G., additional, Fear, R. C., additional, Fuselier, S. A., additional, Petrinec, S. M., additional, Burch, J. L., additional, Dokgo, K., additional, Sibeck, D. G., additional, Giles, B. L., additional, Russell, C. T., additional, Strangeway, R. J., additional, Gershman, D. J., additional, Pollock, C. J., additional, Khotyaintsev, Y., additional, Torbert, R. B., additional, Ergun, R. E., additional, Moen, J. I., additional, and Clausen, L. B., additional

Published
2020
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187. Characteristics of Escaping Magnetospheric Ions Associated With Magnetic Field Fluctuations

Author

Lee, S. H., primary, Sibeck, D. G., additional, Lin, Y., additional, Guo, Z., additional, Adrian, M. L., additional, Silveira, M. V. D., additional, Cohen, I. J., additional, Mauk, B. H., additional, Mason, G. M., additional, Ho, G. C., additional, Giles, B. L., additional, Torbert, R. B., additional, Russell, C. T., additional, Wei, H., additional, Burch, J. L., additional, Vichare, G., additional, and Sinha, A. K., additional

Published
2020
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188. Magnetic Reconnection Inside a Flux Rope Induced by Kelvin‐Helmholtz Vortices

Author

Hwang, K.‐J., primary, Dokgo, K., additional, Choi, E., additional, Burch, J. L., additional, Sibeck, D. G., additional, Giles, B. L., additional, Hasegawa, H., additional, Fu, H. S., additional, Liu, Y., additional, Wang, Z., additional, Nakamura, T. K. M., additional, Ma, X., additional, Fear, R. C., additional, Khotyaintsev, Y., additional, Graham, D. B., additional, Shi, Q. Q., additional, Escoubet, C. P., additional, Gershman, D. J., additional, Paterson, W. R., additional, Pollock, C. J., additional, Ergun, R. E., additional, Torbert, R. B., additional, Dorelli, J. C., additional, Avanov, L., additional, Russell, C. T., additional, and Strangeway, R. J., additional

Published
2020
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189. A New Method of 3‐D Magnetic Field Reconstruction

Author

Torbert, R. B., primary, Dors, I., additional, Argall, M. R., additional, Genestreti, K. J., additional, Burch, J. L., additional, Farrugia, C. J., additional, Forbes, T. G., additional, Giles, B. L., additional, and Strangeway, R. J., additional

Published
2020
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190. Cluster and MMS Simultaneous Observations of Magnetosheath High Speed Jets and Their Impact on the Magnetopause

Author

Escoubet, C. Philippe, primary, Hwang, K.-J., additional, Toledo-Redondo, S., additional, Turc, L., additional, Haaland, S. E., additional, Aunai, N., additional, Dargent, J., additional, Eastwood, Jonathan P., additional, Fear, R. C., additional, Fu, H., additional, Genestreti, K. J., additional, Graham, Daniel B., additional, Khotyaintsev, Yu V., additional, Lapenta, G., additional, Lavraud, Benoit, additional, Norgren, C., additional, Sibeck, D. G., additional, Varsani, A., additional, Berchem, J., additional, Dimmock, A. P., additional, Paschmann, G., additional, Dunlop, M., additional, Bogdanova, Y. V., additional, Roberts, Owen, additional, Laakso, H., additional, Masson, Arnaud, additional, Taylor, M. G. G. T., additional, Kajdič, P., additional, Carr, C., additional, Dandouras, I., additional, Fazakerley, A., additional, Nakamura, R., additional, Burch, Jim L., additional, Giles, B. L., additional, Pollock, C., additional, Russell, C. T., additional, and Torbert, R. B., additional

Published
2020
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191. Electron Heating by Debye-Scale Turbulence in Guide-Field Reconnection

Author

Khotyaintsev, Yu. V., primary, Graham, D. B., additional, Steinvall, K., additional, Alm, L., additional, Vaivads, A., additional, Johlander, A., additional, Norgren, C., additional, Li, W., additional, Divin, A., additional, Fu, H. S., additional, Hwang, K.-J., additional, Burch, J. L., additional, Ahmadi, N., additional, Le Contel, O., additional, Gershman, D. J., additional, Russell, C. T., additional, and Torbert, R. B., additional

Published
2020
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192. Asymmetric Reconnection Within a Flux Rope‐Type Dipolarization Front

Author

Marshall, A. T., primary, Burch, J. L., additional, Reiff, P. H., additional, Webster, J. M., additional, Torbert, R. B., additional, Ergun, R. E., additional, Russell, C. T., additional, Strangeway, R. J., additional, Giles, B. L., additional, Nakamura, R., additional, Hwang, K. ‐J., additional, and Genestreti, K. J., additional

Published
2020
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193. Statistics of Reconnecting Current Sheets in the Transition Region of Earth's Bow Shock

Author

Gingell, I., primary, Schwartz, S. J., additional, Eastwood, J. P., additional, Stawarz, J. E., additional, Burch, J. L., additional, Ergun, R. E., additional, Fuselier, S. A., additional, Gershman, D. J., additional, Giles, B. L., additional, Khotyaintsev, Y. V., additional, Lavraud, B., additional, Lindqvist, P.‐A., additional, Paterson, W. R., additional, Phan, T. D., additional, Russell, C. T., additional, Strangeway, R. J., additional, Torbert, R. B., additional, and Wilder, F., additional

Published
2020
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196. Magnetic Reconnection in Three Dimensions: Modeling and Analysis of Electromagnetic Drift Waves in the Adjacent Current Sheet

Author

Ergun, R. E., primary, Hoilijoki, S., additional, Ahmadi, N., additional, Schwartz, S. J., additional, Wilder, F. D., additional, Drake, J. F., additional, Hesse, M., additional, Shay, M. A., additional, Ji, H., additional, Yamada, M., additional, Graham, D. B., additional, Cassak, P. A., additional, Swisdak, M., additional, Burch, J. L., additional, Torbert, R. B., additional, Holmes, J. C., additional, Stawarz, J. E., additional, Goodrich, K. A., additional, Eriksson, S., additional, Strangeway, R. J., additional, and LeContel, O., additional

Published
2019
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197. Magnetic Reconnection in Three Dimensions: Observations of Electromagnetic Drift Waves in the Adjacent Current Sheet

Author

Ergun, R. E., primary, Hoilijoki, S., additional, Ahmadi, N., additional, Schwartz, S. J., additional, Wilder, F. D., additional, Burch, J. L., additional, Torbert, R. B., additional, Lindqvist, P.‐A., additional, Graham, D. B., additional, Strangeway, R. J., additional, Le Contel, O., additional, Holmes, J. C., additional, Stawarz, J. E., additional, Goodrich, K. A., additional, Eriksson, S., additional, Giles, B. L., additional, Gershman, D., additional, and Chen, L. J., additional

Published
2019
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199. Crater Flux Transfer Events: Highroad to the X Line?

Author

Farrugia, C. J, Chen, Li-Jen, Torbert, R. B, Southwood, D. J, Cowley, S. W. H, Vrublevskis, A, Mouikis, C, Vaivads, A, Andre, M, Decreau, P, Vaith, H, Owen, C. J, Sibeck, D. J, Lucek, E, and Smith, C. W

Subjects
Geophysics
Abstract

We examine Cluster observations of a so-called magnetosphere crater FTE, employing data from five instruments (FGM, CIS, EDI, EFW, and WHISPER), some at the highest resolution. The aim of doing this is to deepen our understanding of the reconnection nature of these events by applying recent advances in the theory of collisionless reconnection and in detailed observational work. Our data support the hypothesis of a stratified structure with regions which we show to be spatial structures. We support the bulge-like topology of the core region (R3) made up of plasma jetting transverse to reconnected field lines. We document encounters with a magnetic separatrix as a thin layer embedded in the region (R2) just outside the bulge, where the speed of the protons flowing approximately parallel to the field maximizes: (1) short (fraction of a sec) bursts of enhanced electric field strengths (up to approximately 30 mV/m) and (2) electrons flowing against the field toward the X line at approximately the same time as the bursts of intense electric fields. R2 also contains a density decrease concomitant with an enhanced magnetic field strength. At its interface with the core region, R3, electric field activity ceases abruptly. The accelerated plasma flow profile has a catenary shape consisting of beams parallel to the field in R2 close to the R2/R3 boundary and slower jets moving across the magnetic field within the bulge region. We detail commonalities our observations of crater FTEs have with reconnection structures in other scenarios. We suggest that in view of these properties and their frequency of occurrence, crater FTEs are ideal places to study processes at the separatrices, key regions in magnetic reconnection. This is a good preparation for the MMS mission.

Published
2011
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200. Reconstruction of the electron diffusion region observed by the Magnetospheric Multiscale spacecraft: First results

Author

Sonnerup, B. U. O., Denton, R. E., Phan, T. -D., Giles, B. L., Gershman, D. J., Dorelli, J. C., Burch, J. L., Torbert, R. B., Russell, C. T., Strangeway, R. J., Lindqvist, P. -A., Khotyaintsev, Y. V., Ergun, R. E., Cassak, P. A., Hasegawa, Hiroshi, Nakamura, T. K. M., Kitamura, Naritoshi, and Saito, Yoshifumi

Subjects
Physics, 010504 meteorology & atmospheric sciences, Magnetic reconnection, Electron, Geophysics, 01 natural sciences, Computational physics, Magnetic field, Current sheet, Electric field, Physics::Space Physics, 0103 physical sciences, General Earth and Planetary Sciences, Magnetopause, Magnetohydrodynamics, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Dimensionless quantity
Abstract

著者人数: 18名, Accepted: 2017-05-09, 資料番号: SA1170022000

Published
2017

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