Results 201 to 210 of about 462,332 (215)

Particle acceleration at planetary bow shock waves

Nature, 1982
We can extend our understanding of collisionless shocks by comparing their behaviour in a variety of plasma conditions at several different planets. One property of such shocks is the occurrence of upstream magnetohydrodynamic waves associated with particle beams accelerated at these shocks, and flowing back towards the Sun1.
M. M. Hoppe, C. T. Russell
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The location of planetary bow shocks: A critical overview of theory and observations

Advances in Space Research, 1995
A bow shock (BS has been observed in the collisionless solar wind upstream of every planet except Pluto, which has yet to be visited by a spacecraft. They are all of similar character, but their size relative to the planet varies widely, e.g., the planeto-centric distance to the BS nose ranges from about 1.4 R(sub V) for Venus to 88 R(sub J) or more ...
J.R Spreiter, S.S Stahara
exaly   +2 more sources

Analytical Description of the Near Planetary Bow Shock Based on Gas-Dynamic and Magneto-Gas–Dynamic Modeling for the Magnetic Field Parallel and Perpendicular to the Plasma Flow

Geomagnetism and Aeronomy, 2020
An analytical semiempirical model of the bow shock based on theoretical MGD calculations, accurate analytical solutions, and experimental data continues to be developed. The model parameters have a clear physical meaning. For cases in which the magnetic field of the solar wind is directed along its velocity or is perpendicular to the velocity vector ...
G. A. Kotova, M. I. Verigin, T. Gombosi, K. Kabin, V. V. Bezrukikh   +4 more
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Voyager energetic particle observations at interplanetary shocks and upstream of planetary bow shocks: 1977–1990

Space Science Reviews, 1992
The Voyager 1 and 2 spacecraft include instrumentation that makes comprehensive ion (E ≳ 28 keV) and electron (E ≳ 22 keV) measurements in several energy channels with good temporal, energy, and compositional resolution. Data collected over the past decade (1977–1988), including observations upstream and downstream of four planetary bow shocks (Earth ...
exaly   +2 more sources

HYDRODYNAMIC AND MHD EQUATIONS ACROSS THE BOW SHOCK AND ALONG THE SURFACES OF PLANETARY OBSTACLES

Space Science Reviews, 1997
Examinations of the magnetohydrodynamic (MHD) equations across a bow shock are presented. These equations are written in the familiar Rankine–Hugoniot set, and an exact solution to this set is given which involves the upstream magnetosonic Mach number, plasma β, polytropic index, and θ B-v , as a function of position ...
S. M. Petrinec, C. T. Russell
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Shock drift acceleration of energetic protons at a planetary bow shock

Journal of Geophysical Research: Space Physics, 1992
We present the results of numerical orbit integrations of the interaction of suprathermal charged particles (protons) with a planetary bow shock. The primary goal of this study is to analyze the effect of the changing geometry of the shock, due to its curvature, on the kinematics of the particle/shock interaction. The model bow shock is a conic section
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Investigations of hydrodynamic and magnetohydrodynamic equations across the bow shock and along the outer edge of planetary obstacles

Advances in Space Research, 1997
Abstract Understanding the interaction of planetary obstacles with the solar wind is fundamental to the entire field of space physics. However, some details of magnetohydrodynamics and even hydrodynamics lead to confusion and the use of incorrect assumptions. One area of confusion involves the position of a bow shock in front of a planetary obstacle;
S.M. Petrinec, C.T. Russell
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Comparison of Particle Acceleration at Planetary Bow Shocks and Interplanetary Shocks

The spatial size of collisionless shock waves is suggested to play an important role in determining the maximum energy gain of particles accelerated at heliospheric and astrophysical shocks. In addition, shocks energize particles with different starting/upstream energies differently.
Martin Lindberg, Heli Hietala, Florian Koller, Laura Vuorinen   +3 more
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Bridging observations and simulations: challenges in planetary bow shock studies

Planetary bow shocks provide an excellent laboratory for studying shock physics. Over the past six decades, they have been extensively investigated in situ by various satellite missions aiming to study particle behavior and fields at both macro and micro scales.
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Magnetic Field Amplification by the Weibel Instability at Planetary and Astrophysical Shocks with High Mach Number

Physical Review Letters, 2021
Jacek Niemiec, Martin Pohl, Ali Sulaiman
exaly