气候变化领域集成服务门户(CCPortal): A New Framework to Explain Changes in Io's Footprint Tail Electron Fluxes

CCPortal

DOI	10.1029/2020GL089267
	A New Framework to Explain Changes in Io's Footprint Tail Electron Fluxes
	Szalay J.R.; Allegrini F.; Bagenal F.; Bolton S.J.; Bonfond B.; Clark G.; Connerney J.E.P.; Ebert R.W.; Hue V.; McComas D.J.; Saur J.; Sulaiman A.H.; Wilson R.J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	We analyze precipitating electron fluxes connected to 18 crossings of Io's footprint tail aurora, over altitudes of 0.15 to 1.1 Jovian radii (RJ). The strength of precipitating electron fluxes is dominantly organized by “Io-Alfvén tail distance,” the angle along Io's orbit between Io and an Alfvén wave trajectory connected to the tail aurora. These fluxes best fit an exponential as a function of down-tail extent with an e-folding distance of 21°. The acceleration region altitude likely increases down-tail, and the majority of parallel electron acceleration sustaining the tail aurora occurs above 1 RJ in altitude. We do not find a correlation between the tail fluxes and the power of the initial Alfvén wave launched from Io. Finally, Juno has likely transited Io's Main Alfvén Wing fluxtube, observing a characteristically distinct signature with precipitating electron fluxes ~600 mW/m2 and an acceleration region extending as low as 0.4 RJ in altitude. © 2020. The Authors.
英文关键词	Earth sciences; Geophysics; Acceleration regions; Best fit; E-folding; Electron acceleration; Electron flux; N-waves; Electrons; acceleration; aurora; correlation; electron; Jupiter; precipitation (chemistry)
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/169691
作者单位	Department of Astrophysical Sciences, Princeton University, Princeton, NJ, United States; Southwest Research Institute, San Antonio, TX, United States; Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, United States; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Space Sciences, Technologies and Astrophysics Research Institute, LPAP, Université de Liège, Liège, Belgium; Johns Hopkins University Applied Physics Lab, Laurel, MD, United States; Space Research Corporation, Annapolis, MD, United States; Goddard Space Flight Center, Greenbelt, MD, United States; Institute of Geophysics and Meteorology, University of Cologne, Cologne, Germany; Department of Physics and Astronomy, University of IowaIA, United States
推荐引用方式 GB/T 7714	Szalay J.R.,Allegrini F.,Bagenal F.,et al. A New Framework to Explain Changes in Io's Footprint Tail Electron Fluxes[J],2020,47(18).
APA	Szalay J.R..,Allegrini F..,Bagenal F..,Bolton S.J..,Bonfond B..,...&Wilson R.J..(2020).A New Framework to Explain Changes in Io's Footprint Tail Electron Fluxes.Geophysical Research Letters,47(18).
MLA	Szalay J.R.,et al."A New Framework to Explain Changes in Io's Footprint Tail Electron Fluxes".Geophysical Research Letters 47.18(2020).