Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Mangeney, André"'
Autor:
Vinogradov, Alexander, Alexandrova, Olga, Démoulin, Pascal, Artemyev, Anton, Maksimovic, Milan, Mangeney, André, Vasiliev, Alexei, Petrukovich, Anatoly, Bale, Stuart
We study intermittent coherent structures in solar wind magnetic turbulence from MHD to kinetic plasma scales using Parker Solar Probe data during its first perihelion (at 0.17 au), when the satellite was in the Alfv\'enic slow wind of 340 km/s. The
Externí odkaz:
http://arxiv.org/abs/2307.10478
Autor:
Alexandrova, Olga, Jagarlamudi, Vamsee Krishna, Hellinger, Petr, Maksimovic, Milan, Shprits, Yuri, Mangeney, Andre
Publikováno v:
Physical Review E, Volume 103, Issue 6, article id.063202, June 2021
We investigate spectral properties of turbulence in the solar wind that is a weakly collisional astrophysical plasma, accessible to in-situ observations. Using the Helios search coil magnetometer measurements in the fast solar wind, in the inner heli
Externí odkaz:
http://arxiv.org/abs/2112.12690
Autor:
Alexandrova, Olga, Jagarlamudi, Vamsee Krishna, Rossi, Claudia, Maksimovic, Milan, Hellinger, Petr, Shprits, Yuri, Mangeney, André
Turbulence develops in any stressed flow when the scales of the forcing are much larger than those of the dissipation. In neutral fluids, it consists of chaotic motions in physical space but with a universal energy spectrum in Fourier space. Intermit
Externí odkaz:
http://arxiv.org/abs/2004.01102
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Autor:
Lacombe, Catherine, Alexandrova, Olga, Matteini, Lorenzo, Santolik, Ondrej, Cornilleau-Wehrlin, Nicole, Mangeney, Andre, de Conchy, Yvonne, Maksimovic, Milan
The nature of the magnetic field fluctuations in the solar wind between the ion and electron scales is still under debate. Using the Cluster/STAFF instrument, we make a survey of the power spectral density and of the polarization of these fluctuation
Externí odkaz:
http://arxiv.org/abs/1410.6187
Publikováno v:
Journal of Geophysical Research (Space Physics), 115, 6106 (2010)
Recent observation of large amplitude Langmuir waveforms during a Type III event in the solar wind have been interpreted as the signature of the electrostatic decay of beam-driven Langmuir waves. This mechanism is thought to be a first step to explai
Externí odkaz:
http://arxiv.org/abs/1301.5155
Publikováno v:
The Astrophysical Journal, Volume 760, Issue 2, article id. 121, 6 pp. (2012)
The description of the turbulent spectrum of magnetic fluctuations in the solar wind in the kinetic range of scales is not yet completely established. Here, we perform a statistical study of 100 spectra measured by the STAFF instrument on the Cluster
Externí odkaz:
http://arxiv.org/abs/1212.0412
Autor:
Alexandrova, Olga, Saur, Joachim, Lacombe, Catherine, Mangeney, Andre, Mitchell, Jeremy, Schwartz, Steve J., Robert, Patrick
In order to investigate the universality of magnetic turbulence in space plasmas we analyze seven time periods in the free solar wind of different origin, slow or fast, and under different plasma conditions. The orientation of magnetic field to the f
Externí odkaz:
http://arxiv.org/abs/0906.3236
We investigate the spectral shape, the anisotropy of the wave vector distributions and the anisotropy of the amplitudes of the magnetic fluctuations in the Earth's magnetosheath within a broad range of frequencies. We present the first observations o
Externí odkaz:
http://arxiv.org/abs/0810.0675
A heuristic model is given for anisotropic magnetohydrodynamics (MHD) turbulence in the presence of a uniform external magnetic field $B_0 {\bf {\hat e}_{\pa}}$. The model is valid for both moderate and strong $B_0$ and is able to describe both the s
Externí odkaz:
http://arxiv.org/abs/physics/0504207