Dominant two-dimensional solar wind turbulence with implications for cosmic ray transport

1996 ◽  
Vol 101 (A2) ◽  
pp. 2511-2522 ◽  
Author(s):  
John W. Bieber ◽  
Wolfgang Wanner ◽  
William H. Matthaeus
2011 ◽  
Vol 29 (10) ◽  
pp. 1731-1738 ◽  
Author(s):  
Y. Narita ◽  
K.-H. Glassmeier ◽  
M. L. Goldstein ◽  
U. Motschmann ◽  
F. Sahraoui

Abstract. Using the four Cluster spacecraft, we have determined the three-dimensional wave-vector spectra of fluctuating magnetic fields in the solar wind. Three different solar wind intervals of Cluster data are investigated for this purpose, representing three different spatial scales: 10 000 km, 1000 km, and 100 km. The spectra are determined using the wave telescope technique (k-filtering technique) without assuming the validity of Taylor's frozen-in-flow hypothesis nor are any assumptions made as to the symmetry properties of the fluctuations. We find that the spectra are anisotropic on all the three scales and the power is extended primarily in the directions perpendicular to the mean magnetic field, as might be expected of two-dimensional turbulence, however, the analyzed fluctuations are not axisymmetric. The lack of axisymmetry invalidates some earlier techniques using single spacecraft observations that were used to estimate the percentage of magnetic energy residing in quasi-two-dimensional power. However, the dominance of two-dimensional turbulence is consistent with the relatively long mean free paths of cosmic rays in observed in the heliosphere. On the other hand, the spectra also exhibit secondary extended structures oblique from the mean magnetic field direction. We discuss possible origins of anisotropy and asymmetry of solar wind turbulence spectra.


2012 ◽  
Vol 19 (2) ◽  
pp. 022305 ◽  
Author(s):  
D. Verscharen ◽  
E. Marsch ◽  
U. Motschmann ◽  
J. Müller

2016 ◽  
Vol 116 (12) ◽  
Author(s):  
C. Perschke ◽  
Y. Narita ◽  
U. Motschmann ◽  
K. H. Glassmeier

2018 ◽  
Vol 867 (2) ◽  
pp. 168 ◽  
Author(s):  
Andrea Verdini ◽  
Roland Grappin ◽  
Olga Alexandrova ◽  
Sonny Lion

2017 ◽  
Vol 846 (2) ◽  
pp. L18 ◽  
Author(s):  
Silvio Sergio Cerri ◽  
Sergio Servidio ◽  
Francesco Califano

2020 ◽  
Vol 900 (2) ◽  
pp. 94 ◽  
Author(s):  
Zackary B. Pine ◽  
Charles W. Smith ◽  
Sophia J. Hollick ◽  
Matthew R. Argall ◽  
Bernard J. Vasquez ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document