Kinetic Interaction of Cold and Hot Protons With an Oblique EMIC Wave Near the Dayside Reconnecting Magnetopause

Abstract

Electromagnetic ion cyclotron (EMIC) waves are generated in various regions of the Earth's magnetosphere when hot (keV to tens of keV) ions have T ⊥ > T ‖ (e.g.

Isolated Proton Aurora Driven by EMIC Pc1 Wave: PWING, Swarm, and NOAA POES Multi‐Instrument Observations

“…Kim and Johnson, (2016) also demonstrated that larger normal angle waves can propagate toward smaller L-shell although they calculated the raypath up to L ∼6 (Figure 4 in Kim & Johnson, 2016). Recently, Toledo-Redondo et al (2021) showed EMIC wave can also be generated at oblique angles when source region consists of a small amount of heavy ions and a large amount of cold protons.…”

Multi‐Ion Oscillitons—Origin of Coherent Magnetospheric EMIC Waves

“…It is worth noting that these points are generally different from those of maximum instability. Another situation occurs when the instability, for example, due to wave-particle heating, creates a second particle group that differs from the already existing one due to different temperature or speed, for example, Teng et al (2019), Usanova (2021), andToledo-Redondo et al (2021). In this case, oscillitons can arise in which groups of particles with the same mass participate, but which differ from each other in other parameters.…”

Multi-ion oscillitons - origin of coherent magnetospheric EMIC waves

“…Especially valuable for confirming the oscilliton concept is the evaluation of multi-point measurements by Toledo-Redondo et al (2021). According to their interpretation, the observed EMIC waves in the H + band (ω/ Ω p ∼ 0.7) arise from the momentum exchange of two groups of cold and warm protons via the mediating electromagnetic field.…”