User profiles for Olga Alexandrova

Olga Alexandrova

LESIA, 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 …

[HTML][HTML] Solar wind turbulence and the role of ion instabilities

O Alexandrova, CHK Chen, L Sorriso-Valvo… - Space Science …, 2013 - Springer
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 …

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 …

Small-scale energy cascade of the solar wind turbulence

O Alexandrova, V Carbone, P Veltri… - The Astrophysical …, 2008 - iopscience.iop.org
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 …

[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 …

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 …

Anisotropy of solar wind turbulence between ion and electron scales

…, AA Schekochihin, RT Wicks, O Alexandrova… - Physical review …, 2010 - APS
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 …

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 …

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 …

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 …