User profiles for Olga Alexandrova
Olga AlexandrovaLESIA, Observatoire de Paris Verified email at obspm.fr Cited by 3780 |
Universality of solar-wind turbulent spectrum from MHD to electron scales
O Alexandrova, J Saur, C Lacombe, A Mangeney… - Physical review …, 2009 - APS
To investigate the universality of magnetic turbulence in space plasmas, we analyze seven
time periods in the free solar wind under different plasma conditions. Three instruments on …
time periods in the free solar wind under different plasma conditions. Three instruments on …
[HTML][HTML] Solar wind turbulence and the role of ion instabilities
Solar wind is probably the best laboratory to study turbulence in astrophysical plasmas. In
addition to the presence of magnetic field, the differences with neutral fluid isotropic …
addition to the presence of magnetic field, the differences with neutral fluid isotropic …
Solar wind vs magnetosheath turbulence and Alfvén vortices
O Alexandrova - Nonlinear Processes in Geophysics, 2008 - npg.copernicus.org
In this paper we give firstly a broad review of the space plasma turbulence around the ion
characteristic space and temporal scales within two natural laboratories, the solar wind and …
characteristic space and temporal scales within two natural laboratories, the solar wind and …
Small-scale energy cascade of the solar wind turbulence
Magnetic fluctuations in the solar wind are distributed according to Kolmogorov’s power law
f^{-5/3} below the ion cyclotron frequency f_ {\mathrm {ci}\,}. Above this frequency, the …
f^{-5/3} below the ion cyclotron frequency f_ {\mathrm {ci}\,}. Above this frequency, the …
[HTML][HTML] Tuning of Ranvier node and internode properties in myelinated axons to adjust action potential timing
MC Ford, O Alexandrova, L Cossell… - Nature …, 2015 - nature.com
Action potential timing is fundamental to information processing; however, its determinants
are not fully understood. Here we report unexpected structural specializations in the Ranvier …
are not fully understood. Here we report unexpected structural specializations in the Ranvier …
Solar wind turbulent spectrum at plasma kinetic scales
O Alexandrova, C Lacombe, A Mangeney… - The Astrophysical …, 2012 - iopscience.iop.org
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 …
kinetic range of scales is not yet completely established. Here, we perform a statistical study of …
Anisotropy of solar wind turbulence between ion and electron scales
The anisotropy of turbulence in the fast solar wind, between the ion and electron gyroscales,
is directly observed using a multispacecraft analysis technique. Second order structure …
is directly observed using a multispacecraft analysis technique. Second order structure …
Whistler mode waves and the electron heat flux in the solar wind: Cluster observations
C Lacombe, O Alexandrova, L Matteini… - The Astrophysical …, 2014 - iopscience.iop.org
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 …
scales is still under debate. Using the Cluster/STAFF instrument, we make a survey of the …
Magnetic turbulence in the geospace environment
…, G Aburjania, K Chargazia, O Alexandrova - Space science …, 2010 - Springer
Magnetic turbulence is found in most space plasmas, including the Earth’s magnetosphere,
and the interaction region between the magnetosphere and the solar wind. Recent …
and the interaction region between the magnetosphere and the solar wind. Recent …
Coherent events and spectral shape at ion kinetic scales in the fast solar wind turbulence
S Lion, O Alexandrova, A Zaslavsky - The Astrophysical Journal, 2016 - iopscience.iop.org
In this paper we investigate spectral and phase coherence properties of magnetic fluctuations
in the vicinity of the spectral transition from large, magnetohydrodynamic to sub-ion scales …
in the vicinity of the spectral transition from large, magnetohydrodynamic to sub-ion scales …