Results 191 to 200 of about 462,332 (215)
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Plasma wave turbulence at planetary bow shocks
Nature, 1981Voyager 1 observations of plasma wave turbulence at Saturn's bow shock are discussed and compared with corresponding data from Jupiter, earth, and Venus. The results suggest that the plasma instabilities that develop at the lower Mach number bow shocks of the terrestrial planets differ from those found at the high Mach number bow shocks of the outer ...
William S. Kurth, Donald A. Gurnett
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Relating the Solar Wind Turbulence Spectral Break at the Dissipation Range with an Upstream Spectral Bump at Planetary Bow Shocks [PDF]
Astrophysical Journal, 2022 Abstract At scales much larger than the ion inertial scale and the gyroradius of thermal protons, the magnetohydrodynamic (MHD) theory is well equipped to describe the nature of solar wind turbulence. The turbulent spectrum itself is defined by a power law manifesting the energy cascading process.
Gang Li, Michael Terres
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Subcritcal dispersive shock waves upstream of planetary bow shocks and at comet Giacobini-Zinner
Geophysical Research Letters, 1988 Electromagnetic simulations are used to investigate the nonlinear evolution of ULF (magnetosonic) waves. These waves have been observed upstream of planetary bow shocks and at Comet Giacobini‐Zinner. The simulations show that these waves steepen to form subcritical dispersive shock waves.
Nojan Omidi, D Winske
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Heliospheric shocks (excluding planetary bow shocks)
Reviews of Geophysics, 1987Even though it took place less than halfway through the last four year period, the AGU Chapman Conference in Napa Valley, California, during February, 1984, highlighted in many ways current U. S. contributions to the study of heliospheric shocks. Considerable recent progress in the theoretical understanding of these discontinuities has been summarized ...
J D Mihalov
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A comparative analysis of terrestrial and planetary bow shocks
2011 XXXth URSI General Assembly and Scientific Symposium, 2011Collisionless shocks, such as the Earth bow shock, are very spectacular and energetic events in the Universe. For instance, generated by supernovae, stellar winds, and the solar wind collisonless shock have important effects. They are considered to be efficient particle accelerators and they act galactic nebula and therefore they are considered to ...
Harald Kucharek
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2013
Our present knowledge of the properties of the various planetary bow shocks is briefly reviewed. We do not follow the astronomical ordering of the planets. We rather distinguish between magnetised and unmagnetised planets which groups Mercury and Earth with the outer giant planets of the solar system, Mars and Moon in a separate group lacking magnetic ...
Rudolf A. Treumann, André Balogh
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Our present knowledge of the properties of the various planetary bow shocks is briefly reviewed. We do not follow the astronomical ordering of the planets. We rather distinguish between magnetised and unmagnetised planets which groups Mercury and Earth with the outer giant planets of the solar system, Mars and Moon in a separate group lacking magnetic ...
Rudolf A. Treumann, André Balogh
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Upstream whistler-mode waves at planetary bow shocks: A brief review
Journal of Atmospheric and Solar-Terrestrial Physics, 2007Upstream 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
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On the nature of ULF waves upstream of planetary bow shocks
Advances in Space Research, 1981The 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 ...
C T Russell
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Physics‐Based Analytical Model of the Planetary Bow Shock Position and Shape
Journal of Geophysical Research: Space Physics, 2021AbstractIn studies of physical processes near planetary bow shocks, empirical models of the latter are usually used. While computational magneto‐hydrodynamics (MHD) or kinetic models of bow shocks are often more accurate, their computationally extensive nature limits their applicability to routine analysis of large volumes of data.
G. Kotova +5 more
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Features of Foreshock Transients at Planetary Bow Shocks
Solar System Research, 2023In front of the bow shock with a quasi-parallel configuration of the interplanetary magnetic field, there exists a region called a foreshock, in which many nonstationary processes take place, the largest of which are collectively named “foreshock transients.” The size of these formations can reach tens of Earth radii, which significantly influences the
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