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THE STRUCTURE AND DYNAMICS OF JUPITERS RING

机译：环的结构和动力学

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JUPITER'S ring has posed a problem since it was first discovered 15 years ago. Its inner edge flares into a torus, the shape of which has not yet been accurately modelled, although it was recognized early (1-3) that electromagnetic effects might be important in determining the spatial and size distribution of the dust particles comprising the ring. These early models suggested that sulphur and oxygen ions dominate the plasma environment of the ring; as these ions diffuse inwards from Io, they produce negatively charged dust grains in the ring. Here we propose that Jupiter's ionosphere is the dominant source of plasma and that the low plasma density allows ultraviolet radiation from the Sun to photoionize the grains, giving them a positive charge. The resulting gradient in the equilibrium charge distribution transports the grains rapidly-on surprisingly short timescales of hours to days-towards Jupiter. The brightness distribution resulting from this model matches closely the observed brightness distribution, suggesting that our model captures the most important processes that shape this ring. [References: 20]
机译：自15年前首次发现以来，JUPITER的戒指就出现了问题。它的内边缘张开成圆环状，其形状尚未精确建模，尽管早期（1-3）认识到电磁效应在确定组成环的尘埃颗粒的空间和尺寸分布方面可能很重要。这些早期模型表明，硫和氧离子在环的等离子体环境中起主导作用。当这些离子从Io向内扩散时，它们在环中产生带负电荷的尘埃颗粒。在这里，我们认为木星的电离层是等离子体的主要来源，而低的等离子体密度使太阳发出的紫外线使谷物光电离，从而使它们带正电荷。所产生的平衡电荷分布梯度会以惊人的短时数小时至数天的时间尺度将谷物快速运输至木星。该模型产生的亮度分布与观察到的亮度分布非常匹配，这表明我们的模型捕获了塑造此环的最重要过程。 [参考：20]

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