Results 1 to 10 of about 838 (214)

Turbulence Upstream and Downstream of Interplanetary Shocks [PDF]

Frontiers in Physics, 2021
The paper reviews the interaction of collisionless interplanetary (IP) shocks with the turbulent solar wind. The coexistence of shocks and turbulence plays an important role in understanding the acceleration of particles via Fermi acceleration mechanisms,
A. Pitňa, J. Šafránková, Z. Němeček, T. Ďurovcová, A. Kis   +4 more
doaj   +3 more sources

Effect of interplanetary shock waves on turbulence parameters [PDF]

Annales Geophysicae
We perform an extensive statistical investigation of how interplanetary fast forward shocks affect certain turbulence parameters, namely, the normalised cross-helicity, σc; residual energy, σr; and magnetic helicity, σm.
E. Kilpua, S. Good, J. Soljento, D. Trotta, D. Trotta, T. Bäcker, J. Ruohotie, J. Pomoell, C. Sishtla, C. Sishtla, R. Vainio   +10 more
doaj   +9 more sources

Interplanetary and interstellar plasma turbulence [PDF]

Plasma Physics and Controlled Fusion, 2007
Theoretical approaches to low-frequency magnetized turbulence in collisionless and weakly collisional astrophysical plasmas are reviewed. The proper starting point for an analytical description of these plasmas is kinetic theory, not fluid equations. The anisotropy of the turbulence is used to systematically derive a series of reduced analytical models.
Schekochihin, A, Cowley, S, Dorland, W
openaire   +5 more sources

MHD Turbulence in the Solar Wind and Interplanetary Dynamo Effects [PDF]

Symposium - International Astronomical Union, 1993
From the fluctuations of the velocity and magnetic field observed in different kinds of solar wind the fluctuating electric fields are derived, and their power spectra are constructed and analysed. The mean electromotive force ɛ generated by the turbulent motions depends upon the nature of the fluctuations.
Marsch, E., Tu, C.
openaire   +3 more sources

Decay of Solar Wind Turbulence behind Interplanetary Shocks

The Astrophysical Journal, 2017
Abstract We investigate the decay of magnetic and kinetic energies behind IP shocks with motivation to find a relaxation time when downstream turbulence reaches a usual solar wind value. We start with a case study that introduces computation techniques and quantifies a contribution of kinetic fluctuations to the general energy balance ...
Alexander Pitňa, Jana Šafránková, Zdeněk Němeček, Luca Franci   +3 more
openaire   +3 more sources

SPECTRUM OF THE INTERPLANETARY PLASMA TURBULENCE AT A DISTANCE FROM THE SUN GREATER THAN 1 AU [PDF]

Radio Physics and Radio Astronomy, 2016
Purpose: Making analysis of variations of fast and slow solarwind parameters at distances from the Sun of about 1 AU and more. Design/methodology/approach: The method of Feynman pathintegrals is applied to calculate the temporal spectra and dispersion
M. R. Olyak, N. N. Kalinichenko, A. A. Konovalenko, A. I. Brazhenko, I. N. Bubnov   +4 more
doaj   +3 more sources

Solar and Interplanetary Turbulence: Lagrangian Coherent Structures

, 2020
<p>The dynamics of solar and interplanetary plasmas is governed by coherent structures such as current sheets and magnetic flux ropes which are responsible for the genesis of intermittent turbulence via magnetic reconnections in solar supergranular junctions, solar coronal loops, the shock-sheath region of an interplanetary ...
Abraham C.‐L. Chian, L. R. Bellot Rubio, H. Q. Feng, Tiago F. P. Gomes, Milan Gošić, D. Grasso, Qiang Hu, K. Kusano, Rodrigo A. Miranda, Pablo R. Muñoz, Erico L. Rempel, D. Ruffolo, Suzana S. A. Silva, Dazhong Wu   +13 more
openaire   +3 more sources

Magnetic field strength distribution in interplanetary turbulence [PDF]

Journal of Geophysical Research: Space Physics, 2000
The distribution of magnetic field magnitudes is derived for the special case of a constant mean field and uncorrelated components having Gaussian distributions. Of the three cases considered (isotropic, transverse, and axisymmetric) the latter most closely resembles a lognormal distribution when the parallel variance is less than the perpendicular ...
T. Hartlep, W. H. Matthaeus, N. S. Padhye, C. W. Smith   +3 more
openaire   +2 more sources

Radial evolution of power spectra of interplanetary Alfvénic turbulence [PDF]

Journal of Geophysical Research: Space Physics, 1982
The radial evolution of the power spectra of the MHD turbulence within the trailing edge of high‐speed streams in the solar wind has been investigated with the magnetic field data of HELIOS 1 and 2 for heliocentric distances between 0.3 and 0.9 AU. In the analyzed frequency range 2.8 · 10−4 ‐ 8.3 · 10−2 Hz the computed spectra have, near the earth ...
B. Bavassano, M. Dobrowolny, F. Mariani, N. F. Ness   +3 more
openaire   +2 more sources

Characterization of the Transmission and Generation of Turbulence at Interplanetary Shocks

The Astrophysical Journal
We study the transmission and characteristics of turbulent magnetohydrodynamic (MHD) fluctuations from upstream to downstream regions of interplanetary (IP) shocks using the linear mode decomposition (LMD) technique of G. P. Zank et al.
Sujan Prasad Gautam, Gary P Zank, Alexander Pitňa, Laxman Adhikari, Lingling Zhao, Ashok Silwal, Prashant Baruwal, Prashrit Baruwal, Monika Karki, Ismita Tasnim, Binod Adhikari   +10 more
doaj   +2 more sources