Open Access
Deceleration of the solar wind in the Earth foreshock region: ISEE 2 and IMP 8 observations
C. Bonifazi,G. Moreno,A. J. Lazarus,J. D. Sullivan +3 more
- Vol. 81, pp 19993
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In this article, the deceleration of the solar wind, in the region of the interplanetary space filled by ions backstreaming from the earth's bow shock and associated waves, was studied using a two-spacecraft technique.Abstract:
The deceleration of the solar wind, in the region of the interplanetary space filled by ions backstreaming from the earth's bow shock and associated waves, is studied using a two-spacecraft technique. This deceleration, which is correlated with the ‘diffuse’ but not with the ‘reflected’ ion population, depends on the solar wind bulk velocity: at low velocities (below 300 km/s) the velocity decrease is ∼5 km/s, while at higher velocities (above 400 km/s) the decrease may be as large as 30 km/s. Along with this deceleration the solar wind undergoes a deflection by ∼1° away from the direction of the earth's bow shock. The energy balance shows that the kinetic energy loss far exceeds the thermal energy which is possibly gained by the solar wind; therefore at least part of this energy must go into waves and/or into the backstreaming ions.read more
Citations
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Book ChapterDOI
A quarter century of collisionless shock research
TL;DR: In this paper, a review highlights conceptual issues that have both governed and reflected the direction of collisionless shock research in the past quarter century, including MHD waves and their steepening, the MHD Rankine-Hugoniot relations, the supercritical shock transition, nonlinear oscillatory wave trains, ion sound anomalous resistivity and the resistive-dispersive transition for subcritical shocks, ion reflection and the structure of supercritical quasi-perpendicular shocks, the earth's foreshock, quasi-parallel shocks, and finally, shock acceleration processes.
Journal ArticleDOI
Electromagnetic ion beam instabilities
TL;DR: In this paper, the authors considered the linear theory of electromagnetic instabilities driven by an energetic ion beam streaming parallel to a magnetic field in a homogeneous Vlasov plasma and provided numerical solutions of the full dispersion equation.
Journal ArticleDOI
Characteristics of reflected and diffuse ions upstream from the earth's bow shock
TL;DR: In this paper, the distinction between two types of upstream ion populations is made on the basis of pronounced differences in their distribution functions, and the authors distinguish between reflected and diffuse ion populations.
Journal ArticleDOI
Upstream pressure variations associated with the bow shock and their effects on the magnetosphere
TL;DR: In this paper, the AMPTE IRM solar wind data were analyzed to determine the relationship between upstream pressure fluctuations and magnetospheric perturbations, and it was argued that the upstream pressure variations are not inherent in the solar wind but rather are associated with the bow shock.
Journal ArticleDOI
Hot, diamagnetic cavities upstream from the Earth's bow shock
TL;DR: In this paper, a model of hot, expanding diamagnetic plasma cavities with scales on the order of a few earth radii is proposed for the bow shock, foreshock, the magnetosphere and the solar wind.
References
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Journal ArticleDOI
Observations of two distinct populations of bow shock ions in the upstream solar wind
TL;DR: In this article, the LASL/MPI fast plasma experiments on ISEE 1 and 2 reveal the presence of two distinct and mutually exclusive populations of low energy (no more than 40 keV) ions apparently accelerated at the bow shock.
Book ChapterDOI
A quarter century of collisionless shock research
TL;DR: In this paper, a review highlights conceptual issues that have both governed and reflected the direction of collisionless shock research in the past quarter century, including MHD waves and their steepening, the MHD Rankine-Hugoniot relations, the supercritical shock transition, nonlinear oscillatory wave trains, ion sound anomalous resistivity and the resistive-dispersive transition for subcritical shocks, ion reflection and the structure of supercritical quasi-perpendicular shocks, the earth's foreshock, quasi-parallel shocks, and finally, shock acceleration processes.
Journal ArticleDOI
Electromagnetic ion beam instabilities
TL;DR: In this paper, the authors considered the linear theory of electromagnetic instabilities driven by an energetic ion beam streaming parallel to a magnetic field in a homogeneous Vlasov plasma and provided numerical solutions of the full dispersion equation.
Journal ArticleDOI
Characteristics of reflected and diffuse ions upstream from the earth's bow shock
TL;DR: In this paper, the distinction between two types of upstream ion populations is made on the basis of pronounced differences in their distribution functions, and the authors distinguish between reflected and diffuse ion populations.
Journal ArticleDOI
ISEE-1 and ISEE-2 Fast Plasma Experiment and the ISEE-1 Solar Wind Experiment
S. J. Bame,J. R. Asbridge,H. E. Felthauser,J. P. Glore,G. Paschmann,P. Hemmerich,K. Lehmann,H. Rosenbauer +7 more
TL;DR: Identical fast plasma experiment (FPE) systems were placed on the ISEE-1 and IsEE-2 spacecraft to measure solar-wind ions with high resolution.