Results 171 to 180 of about 838 (214)

Scintillation, density and turbulence in the interplanetary medium

Planetary and Space Science, 1990
Abstract An attempt is made to reconcile the different power laws obtained when relating, on the one hand, interplanetary scintillation (IPS) to solar-wind density and, on the other, density turbulence to density. A numerical experiment was performed using a 2-D magnetohydrodynamical (MHD) model to simulate the solar wind in the ecliptic plane and ...
S.J. Tappin, Z.K. Smith, M. Dryer
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Fully Developed Anisotropic Hydromagnetic Turbulence in Interplanetary Space

Physical Review Letters, 1980
The solar-wind magnetohydrodynamic turbulence is observed to be mainly made of Alfv\'enic fluctuations propagating away from the sun. It is shown that such an asymmetric state is a general consequence of the evolution of developed magnetohydrodynamic turbulence, which, starting from an initial asymmetry between modes with cross helicity + 1 and - 1 ...
DOBROWOLNY M., MANGENEY A., VELTRI, Pierluigi   +2 more
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The magnetic field turbulence near interplanetary shock fronts

Advances in Space Research, 1984
The power spectra (frequency range 10−3 to 10−2 Hz) of the magnetic field fluctuations near interplanetary shock fronts (IPS) are analysed using Venera 13 and Venera 14 data. Ten events in teh period from November, 1981 to February, 1982 typical for IPS passings are evaluated. The event on February 2, 1982 is considered in detail.
E.I. Morozova, N.F. Pissarenko, W. Riedler, K. Schwingenschuh, G. Schelch, I.P. Bezrodnykh, Ye.G. Yeroshenko   +6 more
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Turbulence and Scintillations in the Interplanetary Plasma

Annual Review of Astronomy and Astrophysics, 1973
The properties of the broadband fluctuations of the interplanetary plasma are discussed, taking into account observations in the vicinity of 1 AU heliocentric radius on space probes. Aspects of interplanetary scintillations and angular broadening as a probe of the solar wind are considered, giving attention to the 'thin-screen' approximation, a three ...
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Turbulent Generation of Outward-Traveling Interplanetary Alfvénic Fluctuations

Physical Review Letters, 1983
Additional evidence is presented for the dynamic alignment of the fluctuating plasma fluid velocity and the fluctuating magnetic field in two-dimensional MHD turbulence. The evidence is seen as indicating that the interplanetary fluctuations need not represent time-asymptotic states. Rather, it is contended that interplanetary Alfvenic fluctuations are
William H. Matthaeus, Melvyn L. Goldstein, David C. Montgomery   +2 more
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Turbulence in the Interplanetary Medium: Can Discrete Modes Co-Exist With Turbulence?

AIP Conference Proceedings, 2011
Spacecraft observations during the last decade suggest the presence of discrete frequency wave‐like signals embedded in turbulent solar wind fluctuations. A basic plasma physics question immediately arises how a single monochromatic wave mode can survive in the presence of magnetofluid turbulence.
S. Ghosh, D. J. Thomson, W. H. Matthaeus, L. J. Lanzerotti, Dimitris Vassiliadis, Shing F. Fung, Xi Shao, Ioannis A. Daglis, Joseph D. Huba   +8 more
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Dissipation of interplanetary turbulence by pick-up ions

Advances in Space Research, 1997
Abstract The interaction of MHD waves with pick-up ions in the outer heliosphere is considered. The transport equation for wave energy density describes non-linear wave interaction and wave dissipation due to the resonant interaction with pick-up ions.
V.S. Ptuskin, S.I. Rogovaya, V.N. Zirakashvili, J.A. Le Roux   +3 more
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ULF Disturbances Caused by the Turbulent Sheath of Interplanetary Magnetic Clouds

Bulletin of the Russian Academy of Sciences: Physics, 2021
Simultaneous disturbances of the total electron content and the horizontal component of geomagnetic field in the range of Pc6 are registered during periods of magnetospheric substorms. Such disturbances arise in intervals of interaction between Earth’s magnetosphere and the turbulent sheath of magnetic clouds.
O. M. Barkhatova, V. G. Vorobjev, N. A. Barkhatov, S. E. Revunov   +3 more
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Turbulent spectra of the solar wind near interplanetary shocks

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC), 2015
The solar wind is a supersonic and super-Alfvenic plasma flow of solar origin filling the whole heliosphere. It has a strong turbulent character with several energy cascades. Interplanetary (IP) shocks are characterized by abrupt changes of plasma parameters and the magnetic field strength.
O. Kruparova, V. Krupar, J. Safrankova, Z. Nemecek, O. Santolik, M. Maksimovic, J. Soucek   +6 more
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Models of inertial range spectra of interplanetary magnetohydrodynamic turbulence

Journal of Geophysical Research: Space Physics, 1990
Recently developed transport theories for small‐scale solar wind fluctuations explicitly treat convection, expansion, and other interactions with large‐scale gradients, while separating nonlinear effects associated with triple correlations of the fluctuations.
Ye Zhou, William H. Matthaeus
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