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Comparison of the orbital properties of Jupiter Trojan asteroids and Trojan dust

机译:木星特洛伊小行星和特洛伊尘埃轨道特性的比较

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In a previous paper we simulated the orbital evolution of dust particles from the Jupiter Trojan asteroids ejected by the impacts of interplanetary particles, and evaluated their overall configuration in the form of dust arcs. Here we compare the orbital properties of these Trojan dust particles and the Trojan asteroids. Both Trojan asteroids and most of the dust particles are trapped in the Jupiter 1:1 resonance. However, for dust particles, this resonance is modified because of the presence of solar radiation pressure, which reduces the peak value of the semi-major axis distribution. We find also that some particles can be trapped in the Saturn 1:1 resonance and higher order resonances with Jupiter. The distributions of the eccentricity, the longitude of pericenter, and the inclination for Trojans and the dust are compared. For the Trojan asteroids, the peak in the longitude of pericenter distribution is about 60 degrees larger than the longitude of pericenter of Jupiter; in contrast, for Trojan dust this difference is smaller than 60 degrees, and it decreases with decreasing grain size. For the Trojan asteroids and most of the Trojan dust, the Tisserand parameter is distributed in the range of two to three.
机译:在以前的论文中,我们模拟了木星特洛伊木星小行星尘埃粒子的轨道演化,这些尘埃是由行星际粒子的撞击而喷出的,并以尘埃弧的形式评估了它们的整体结构。在这里,我们比较了这些木马尘埃颗粒和木马小行星的轨道特性。木马小行星和大多数尘埃粒子都被困在木星1:1共振中。然而,对于灰尘颗粒,由于存在太阳辐射压力而改变了该共振,这降低了半长轴分布的峰值。我们还发现,一些粒子可能被困在土星的1:1共振和木星的更高阶共振中。比较了特洛伊木马程序和尘埃的偏心距,中心距经度以及倾斜度的分布。对于特洛伊小行星,其中心点分布的经度峰值比木星中心点的经度大60度。相反,对于特洛伊木马灰尘,此差异小于60度,并且随着晶粒尺寸的减小而减小。对于Trojan小行星和大多数Trojan尘埃,Tisserand参数的分布范围是2到3。

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