日本地球惑星科学連合2018年大会

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[JJ] ポスター発表

セッション記号 P (宇宙惑星科学) » P-PS 惑星科学

[P-PS08] 惑星科学

2018年5月20日(日) 13:45 〜 15:15 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:岡本 尚也(国立研究開発法人宇宙航空開発機構 宇宙科学研究所)、黒崎 健二(名古屋大学大学院 理学研究科 素粒子宇宙物理学専攻)

[PPS08-P17] A multi-instrument analysis of Juno data to investigate the sources of non-thermal radiation at Jupiter

*Daniel Santos-Costa1Scott Bolton1Steven Levin2Fabiano Oyafuso2Shannon Brown2Michael Janssen2Samuel Gulkis2Amadeo Bellotti3Paul Steffes3Virgil Adumitroaie2Jack Connerney4George Clark5Barry Mauk5Heidi Becker2John Jorgensen6Vincent Hue1Joshua Kammer1Randy Gladstone1Thomas Greathouse1Bertrand Bonfond7Frederic Allegrini1Phil Valek1William Kurth8George Hospodarsky8Emma Bunce9Fran Bagenal10 (1.Southwest Research Institute、2.JPL/CalTech、3.Georgia Institute of Technology、4.NASA Goddard Space Flight Center、5.JHU/APL、6.DTU Space、7.LPAL、8.University of Iowa、9.University of Leicester、10.LASP)

キーワード:Jupiter, Juno, Magnetosphere, Electron Beams

Since August 2016, the Juno MicroWave Radiometer (MWR) has continuously measured the radiation emitted by Jupiter and the surrounding environment, over a frequency range from 0.6 to 22 GHz, from Juno’s highly elliptical 53-day polar orbit about Jupiter. The contributors to the strongest radio signals at the shorter frequencies are the thermal, cosmic microwave background, and synchrotron emission produced by the inner electron belt. Weaker but perceptible signatures in MWR are also reported at the shortest frequency during perijove 1 (PJ1) and PJ3-PJ11. Some of them are identified as a source of synchrotron emission produced by downward field-aligned MeV electrons in the middle magnetosphere. In this paper, we focus on synchrotron emissions originating from regions beyond Io's plasma torus that we believe to be linked to auroral activity. To support our findings, we discuss the results of a multi-instrument analysis of radio (MWR, WAVES), field (Juno magnetometer), extreme and far-ultraviolet auroral emission (Juno/UVS), plasma and energetic electron (JADE, JEDI) datasets, and background radiation signatures in Juno's ASC instrument for PJ1.