Study on the Emission Mechanism of Jupiter's Decametric Radio Waves by using a High Sensitive Dual-Polarized Antenna System LWA1

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400480
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Kochi National College of Technology
• Principal Investigator: IMAI Kazumasa 高知工業高等専門学校, 電気情報工学科, 教授 (20132657)
• Research Collaborator: Clarke Tracy Naval Research Laboratory ; Higgins Chuck Middle Tennessee State University ; Reyes Francisco University of Florida ; IMAI Masafumi 京都大学, 大学院
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 地球惑星科学 / 宇宙プラズマ波動 / 木星電波 / 電波放射機構 / 偏波観測 / モジュレーションレーン

Outline of Final Research Achievements

The radiation mechanism of Jupiter's decametric radio emissions has not been fully understood. We analyzed the data observed by a high sensitive dual-polarized antenna system LWA1. The measured fine structures of modulation lanes on the both right and left hand polarization components of the dynamic spectrum show the existence of two components coming from different hemisphere radio sources. We successfully identified the Jupiter radio components coming from the regions related to the UV auroras of the Io plasma torus. These results add important information regarding the emission mechanism of Jupiter's decametric radio waves.

Free Research Field

宇宙電波工学