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Solar wind pressure effects on Jupiter decametric radio emissions independent of Io

机译：太阳风压对木星十进制无线电发射的影响独立于Io

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摘要

This paper investigates the effects of the solar wind dynamic pressure on Jupiter auroral radio emissions at decametric wavelengths that are not controlled by the electrodynamic interaction with the moon Io (non-Io DAM). In order to conduct this study, Nancay decametric array radio data are analyzed for the 1996-1999 period. Solar wind conditions at Jupiter's orbit are studied using the Michigan University solar wind propagation model (mSWiM). Interplanetary fast shocks (forward shocks, FS, or reverse shocks, RS), and average solar wind dynamic pressure are correlated with non-Io DAM emission occurrence, duration and power. It is found that non-Io DAM emissions occur preferentially during periods of enhanced solar wind dynamic pressure and after a FS or a RS arrival at Jupiter. The dawn (non-Io B-type) and dusk (non-lo-A-type) radio emissions are investigated separately and show (1) a dawn-dusk asymmetry consistent with prior studies and auroral ultraviolet (UV) observations, and (2) different behaviors in response to solar wind shocks. Our study confirms the solar wind control of - at least a part of - the non-Io DAM, and refines the scenario of response of the radio emissions to the solar wind interaction with the Jovian magnetosphere.
机译：本文研究了太阳风动压在不受与月球Io（non-Io DAM）电动相互作用控制的十米波长下对木星极光无线电发射的影响。为了进行这项研究，分析了1996-1999年期间Nancay十米阵列无线电数据。使用密歇根大学的太阳风传播模型（mSWiM）研究了木星轨道上的太阳风状况。行星际快速冲击（前向冲击，FS或反向冲击，RS）和平均太阳风动压与非Io DAM排放的发生，持续时间和功率相关。发现非Io DAM排放优先发生在太阳风动压增强期间以及FS或RS到达木星之后。分别研究了黎明（非Io B型）和黄昏（非loA型）无线电发射，它们显示（1）与先前研究和极光紫外线（UV）观测结果一致的黎明黄昏不对称性，以及（ 2）针对太阳风冲击的不同行为。我们的研究证实了非Io DAM的至少一部分的太阳风控制，并完善了无线电辐射对太阳风与木卫一磁层相互作用的响应方案。

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