| Title: |
Numerical Study of Inertial Kinetic-Alfvén Turbulence. |
| Authors: |
Vadim Roytershteyn1 vroytershteyn@spacescience.org, Stanislav Boldyrev1,2, Gian Luca Delzanno3, Christopher H. K. Chen4, Daniel Grošelj5, Nuno F. Loureiro6 |
| Source: |
Astrophysical Journal. 1/10/2019, Vol. 870 Issue 2, p1-1. 1p. |
| Subject Terms: |
*PLASMA Alfven waves, *SOLAR corona, *PLASMA turbulence, *ELECTRON plasma, *PHENOMENOLOGICAL theory (Physics), *ASTROPHYSICS, *SOLAR wind |
| Abstract: |
Recent observational and analytical studies suggested that a new regime of kinetic turbulence may exist in plasma environments with low electron beta (Chen & Boldyrev 2017). Such a regime, termed inertial kinetic-Alfvén turbulence (iKAW), is relevant for the solar corona, Earth’s magnetosheath, and other astrophysical systems where the electron and ion plasma beta parameters satisfy the condition βe ≪ βi ≲ 1. In this paper we present kinetic numerical simulations that confirm the existence of the iKAW regime. Specifically, the simulations demonstrate a transition at scales below electron inertial length de when βe ≪ βi ≲ 1. Spectral slopes and other statistical properties of turbulence at sub-de scales are consistent with the phenomenological theory of inertial kinetic-Alfvén turbulence proposed by Chen & Boldyrev (2017) and with the recent observations in the Earth’s magnetosheath. [ABSTRACT FROM AUTHOR] |
|
Copyright of Astrophysical Journal is the property of IOP Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Academic Search Complete |
