Numerical Study of Inertial Kinetic-Alfvén Turbulence
Name
Roytershteyn_2019_ApJ_870_103.pdf
Description
Published version
Size
3.51 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Roytershteyn, Vadim
Boldyrev, Stanislav
Delzanno, Gian Luca
Chen, Christopher H. K.
Grošelj, Daniel
Gomes Loureiro, Nuno F
Date Issued
January 2019
Journal
Astrophysical Journal
Publisher
American Astronomical Society
Citation
Roytershteyn, Vadim, et al., "Numerical Study of Inertial Kinetic-Alfvén Turbulence." Astrophysical Journal 870, 2 (January 2019): no. 103 doi 10.3847/1538-4357/aaf288 ©2019 Author(s)
Version
Final published version
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 β e ≪ β i ≲ 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 d e when β e ≪ β i ≲ 1. Spectral slopes and other statistical properties of turbulence at sub-d e 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. ©2019
Subjects
Space and Planetary Science
Astronomy and Astrophysics
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.3847/1538-4357/aaf288
