Journal
ASTROPHYSICAL JOURNAL
Volume 702, Issue 1, Pages 460-471Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/702/1/460
Keywords
ISM: kinematics and dynamics; MHD; turbulence
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In this paper, we systematically study the spectrum and structure of incompressible magnetohydrodynamic turbulence by means of high-resolution direct numerical simulations. We considered both balanced and imbalanced (cross-helical) cases and simulated sub-Alfvenic as well as trans-Alfvenic turbulence. This paper, extends numerics preliminarily reported in Beresnyak & Lazarian. We confirm that driven imbalanced turbulence has a stationary state even for high degrees of imbalance. Our major finding is that the structure of the dominant and subdominant Alfvenic components are notably different. Using the most robust observed quantities, such as the energy ratio, we believe we can reject several existing models of strong imbalanced turbulence.
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