Spectrum of magnetohydrodynamic turbulence
| dc.creator | Boldyrev, Stanislav | |
| dc.date | 2005-11-10 | |
| dc.date | 2006-02-24 | |
| dc.date.accessioned | 2026-07-07T06:44:59Z | |
| dc.date.available | 2026-07-07T06:44:59Z | |
| dc.description | We propose a phenomenological theory of strong incompressible magnetohydrodynamic turbulence in the presence of a strong large-scale external magnetic field. We argue that in the inertial range of scales, magnetic-field and velocity-field fluctuations tend to align the directions of their polarizations. However, the perfect alignment cannot be reached, it is precluded by the presence of a constant energy flux over scales. As a consequence, the directions of fluid and magnetic-field fluctuations at each scale $λ$ become effectively aligned within the angle $ϕ_λ\propto λ^{1/4}$, which leads to scale-dependent depletion of nonlinear interaction and to the field-perpendicular energy spectrum $E(k_{\perp})\propto k_{\perp}^{-3/2}$. Our results may be universal, i.e., independent of the external magnetic field, since small-scale fluctuations locally experience a strong field produced by large-scale eddies. | |
| dc.description | 4 pages, 3 figures, to appear in Phys. Rev. Lett | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0511290 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0511290 | |
| dc.identifier | Phys.Rev.Lett. 96 (2006) 115002 | |
| dc.identifier | doi:10.1103/PhysRevLett.96.115002 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/102933 | |
| dc.subject | Astrophysics | |
| dc.subject | Chaotic Dynamics | |
| dc.subject | Plasma Physics | |
| dc.title | Spectrum of magnetohydrodynamic turbulence | |
| dc.type | text |