Japan Geoscience Union Meeting 2019

Presentation information

[E] Oral

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM13] Inner magnetosphere: Recent understanding and new insights

Tue. May 28, 2019 3:30 PM - 5:00 PM A04 (TOKYO BAY MAKUHARI HALL)

convener:Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University), Danny Summers(Memorial University of Newfoundland), Yoshizumi Miyoshi(Institute for Space-Earth Environmental Research, Nagoya University), Shinji Saito(Graduate School of Science, Nagoya University), Chairperson:Yoshizumi Miyoshi(ISEE, Nagoya University), Danny Summers

3:50 PM - 4:10 PM

[PEM13-07] Electron scattering by isolated chorus elements observed near the magnetospheric equator

★Invited Papers

*Satoshi Kasahara1, Yoshizumi Miyoshi2, Shoichiro Yokota3, Yoshiya Kasahara4, Shoya Matsuda5, Ayako Matsuoka5, Kunihiro Keika1, Tomoaki Hori2, Iku Shinohara5 (1.The university of Tokyo, 2.Nagoya University, 3.Osaka University, 4.Kanazawa University, 5.Institute of Space and Astronautical Science)

Keywords:electron scattering, chorus waves

Theories have predicted significant pitch angle scattering of electron by chorus waves via cyclotron resonance, resulting in electron precipitation into the atmosphere and consequent auroral illumination. Recent observations of chorus waves at the equator, in conjunction with ground observations, have indicated that even a single chorus element can cause sufficient electron scattering causing auroral flashing. Here we report more direct, in-situ evidence that electrons are indeed scattered into the loss cone up to strong diffusion, by an isolated chorus element. We discuss the scattering rate based on the observed parameters.