Abstract
AbstractA unified physical model of auroral arc growth and electron acceleration is constructed from the gyrokinetic and two‐fluid equations for the magnetosphere‐ionosphere (M‐I) coupling system. The present theory describes destabilization of kinetic Alfvén waves (KAWs) in the M‐I coupling, where development of upward and downward field‐aligned currents carried by the KAWs leads to ionospheric density enhancement and depletion, respectively. The feedback M‐I coupling through KAWs elucidates growth of auroral arcs and field‐aligned acceleration of electrons self‐consistently and provides a possible explanation to the Alfvénic auroras observed by the FAST spacecraft.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
