Results 181 to 190 of about 17,759 (228)

On the nature of ULF waves upstream of planetary bow shocks

Advances in Space Research, 1981
The ULF electromagnetic waves associated with the earth's foreshock appear in two discrete frequency ranges, designated the low frequency waves at 0.01 - .05 Hz and the high frequency waves at 0.4 - 1.0 Hz. Falling within this second class are both the 0.4 Hz discrete wave packets and the slightly higher frequency wave trains commonly found just ...
M. M. Hoppe, C. T. Russell
semanticscholar   +3 more sources

Upstream whistler-mode waves at planetary bow shocks: A brief review

Journal of Atmospheric and Solar-Terrestrial Physics, 2007
Upstream whistler-mode waves appear to be present in front of all collisionless shocks. Because the whistler-mode group velocity exceeds its phase velocity over the frequency range in which the phase velocity increases with frequency, interesting alterations of polarization and frequency spectrum occur in the observer's reference frame.
C. T. Russell
semanticscholar   +3 more sources

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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 ...
S. Krimigis
openaire   +2 more sources

Planetary bow shocks

, 1985
Planetary bow shocks provide insight into both the behavior of collisionless shocks and the nature of the planetary obstacle responsible for creating those bow shocks. This review paper first presents a survey of the microstructure of planetary bow shocks using data obtained at Mercury, Venus, the earth, Mars, Jupiter, and Saturn.
C. T. Russell
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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 ...
Г. А. Котова, М. И. Веригин, T. I. Gombosi, К. Кабин, В. В. Безруких   +4 more
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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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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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REMOTE RADIO OBSERVATIONS OF SOLAR WIND PARAMETERS UPSTREAM OF PLANETARY BOW SHOCKS

1992
R.J. MacDowall, R.G. Stone, J.D. Gaffey
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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
openaire   +1 more source

Streams and Bubbles: Tidal Shaping of Hydrodynamic Planetary Outflows

Astrophysical Journal
Planets, especially those close to their host stars, lose mass to atmospheric outflows, a process that is thought to shape the bimodal population of gaseous giant and rocky terrestrial exoplanets in close orbits.
M. MacLeod, A. Oklopčić, F. Nail, D. Linssen   +3 more
semanticscholar   +1 more source