Affiliation:
1. Department of Physical Sciences Embry‐Riddle Aeronautical University Daytona Beach FL USA
Abstract
AbstractObservations from the NASA Magnetospheric Multiscale (MMS) satellites show packages of extremely low frequency (ELF) whistler‐mode waves localized inside the small‐scale irregularities of the magnetic field. These irregularities are formed by the narrow field‐aligned channels where the magnitude of the background magnetic field inside the channel is greater or less than outside. By analogy with the classical density ducts, we introduce the high‐B duct, where the magnitude of the field inside the channel is greater than the outside, and the low‐B duct, where the magnitude of the field inside the channel is less than the outside. We investigate the guiding of the ELF whistler‐mode waves by high‐B and low‐B ducts. We derive the analytical criteria for the wave ducting by these ducts and confirm them with two‐dimension, time‐dependent simulations of the electron‐MHD model. Also, we model ELF whistler‐mode waves observed inside the high‐B and low‐B ducts by MMS satellites.
Funder
Air Force Office of Scientific Research
Publisher
American Geophysical Union (AGU)
Subject
Space and Planetary Science,Geophysics
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献