气候变化领域集成服务门户(CCPortal): Ganymede-Induced Decametric Radio Emission: In Situ Observations and Measurements by Juno

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DOI	10.1029/2020GL090021
	Ganymede-Induced Decametric Radio Emission: In Situ Observations and Measurements by Juno
	Louis C.K.; Louarn P.; Allegrini F.; Kurth W.S.; Szalay J.R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	At Jupiter, part of the auroral radio emissions are induced by the Galilean moons Io, Europa, and Ganymede. Until now, they have been remotely detected, using ground-based radio telescopes or electric antennas aboard spacecraft. The polar trajectory of the Juno orbiter allows the spacecraft to cross the magnetic flux tubes connected to these moons, or their tail, and gives a direct measure of the characteristics of these decametric moon-induced radio emissions. In this study, we focus on the detection of a radio emission during the crossing of magnetic field lines connected to Ganymede's tail. Using electromagnetic waves (Juno/Waves) and in situ electron measurements (Juno/JADE-E), we estimate the radio source size of ∼250 km, a radio emission growth rate >3 × 10−4, a resonant electron population of energy (Formula presented.) –15 keV and an emission beaming angle of θ = 76–83°, at a frequency ∼1.005–1.021 × fce. We also confirmed that radio emission is associated with Ganymede's downtail far ultraviolet emission. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electromagnetic waves; Magnetic flux; Population statistics; Auroral radio emissions; Direct measures; Electron measurements; Electron population; Far ultraviolet emissions; In-situ observations; Magnetic field line; Magnetic flux tube; Orbits; electromagnetic wave; emission; Ganymede; in situ measurement; instrumentation; magnetic field; measurement method; observational method; radio
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169551
作者单位	IRAP, Université de Toulouse, CNRS, CNES, UPS, Toulouse, France; Southwest Research Institute, San Antonio, TX, United States; Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; Department of Astrophysical Sciences, Princeton University, Princeton, NJ, United States
推荐引用方式 GB/T 7714	Louis C.K.,Louarn P.,Allegrini F.,et al. Ganymede-Induced Decametric Radio Emission: In Situ Observations and Measurements by Juno[J],2020,47(20).
APA	Louis C.K.,Louarn P.,Allegrini F.,Kurth W.S.,&Szalay J.R..(2020).Ganymede-Induced Decametric Radio Emission: In Situ Observations and Measurements by Juno.Geophysical Research Letters,47(20).
MLA	Louis C.K.,et al."Ganymede-Induced Decametric Radio Emission: In Situ Observations and Measurements by Juno".Geophysical Research Letters 47.20(2020).