Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Poster

P (Space and Planetary Sciences) » P-PS Planetary Sciences

[P-PS08] Planetary Sciences

Sun. May 20, 2018 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Takaya Okamoto(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Kenji Kurosaki(Department of Physics, Nagoya University)

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

*Daniel Santos-Costa1, Scott Bolton1, Steven Levin2, Fabiano Oyafuso2, Shannon Brown2, Michael Janssen2, Samuel Gulkis2, Amadeo Bellotti3, Paul Steffes3, Virgil Adumitroaie2, Jack Connerney4, George Clark5, Barry Mauk5, Heidi Becker2, John Jorgensen6, Vincent Hue1, Joshua Kammer1, Randy Gladstone1, Thomas Greathouse1, Bertrand Bonfond7, Frederic Allegrini1, Phil Valek1, William Kurth8, George Hospodarsky8, Emma Bunce9, Fran 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)

Keywords: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.