TY  - JOUR
A1  - Vafin, Sergei
A1  - Schlickeiser, R.
A1  - Yoon, P. H.
T1  - AMPLIFICATION OF COLLECTIVE MAGNETIC FLUCTUATIONS IN MAGNETIZED BI-MAXWELLIAN PLASMAS FOR PARALLEL WAVE VECTORS. I. ELECTRON-PROTON PLASMA
JF  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - The general electromagnetic fluctuation theory is a powerful tool to analyze the magnetic fluctuation spectrum of a plasma. Recent works utilizing this theory for a magnetized non-relativistic isotropic Maxwellian electron-proton plasma have demonstrated that the equilibrium ratio of vertical bar delta B vertical bar/B-0 can be as high as 10(-12). This value results from the balance between spontaneous emission of fluctuations and their damping, and it is considerably smaller than the observed value vertical bar delta B vertical bar/B-0 in the solar wind at 1 au, where 10(-3) less than or similar to vertical bar delta B vertical bar/B-0 less than or similar to 10(-1). In the present manuscript, we consider an anisotropic bi-Maxwellian distribution function to investigate the effect of plasma instabilities on the magnetic field fluctuations. We demonstrate that these instabilities strongly amplify the magnetic field fluctuations and provide a sufficient mechanism to explain the observed value of vertical bar delta B vertical bar/B-0 in the solar wind at 1 au.
KW  - instabilities
KW  - magnetic fields
KW  - solar wind
KW  - turbulence
KW  - waves
Y1  - 2016
U6  - https://doi.org/10.3847/0004-637X/829/1/41
SN  - 0004-637X
SN  - 1538-4357
VL  - 829
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -