Work

Contribution of Substorm‐Injected Electrons to the High‐Frequency Plasmaspheric Hiss Generation: A Statistical Study by Van Allen Probes

Year: 2025

Type: article

Abstract: High‐frequency plasmaspheric hiss (HFPH) is considered to be excited by substorm‐injected electrons in a case study (He et al., 2019, https://doi.org/10.1029/2018gl081578 ). To better understand its generation, we performed a statistical study on this wave and electron distributions, based on the Van Allen Probe data from 2012 to 2018. It shows HFPH cover a wide space from predawn to dusk side during active substorms ( nT), with large amplitudes ( pT) at . Simultaneously, injected electrons are enhanced in the energy range from eV to tens keV. Calculated linear wave growth rates driven by the injected electrons suggest HFPH is more effectively excited at dawnside, consistent with observations. Besides, the effective energy band of the electrons related to a wave decreases as L shell increases and the higher frequency wave is excited over lower L shells. Those explain HFPH spatial distributions and provide new insights into contribution of substorm‐injected electrons to HFPH generation.

Source: Geophysical Research Letters

DOI: 10.1029/2024gl113866

Authors: Qi Yan, Zhaoguo He, Jiang Yu, Xiangling Ding

Institutions: Chinese Academy of Sciences, National Space Science Center, Macau University of Science and Technology, State Key Laboratory of Lunar and Planetary Sciences, Sun Yat-sen University

Language: English

Topic: Ionosphere and magnetosphere dynamics

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,190

Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation, Basic and Applied Basic Research Foundation of Guangdong Province