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THE COLOR DIFFERENCES OF KUIPER BELT OBJECTS IN RESONANCE WITH NEPTUNE

机译:海王星与海带共鸣的颜色差异

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The optical colors of 58 objects in mean motion resonance with Neptune were obtained. The various Neptune resonant populations were found to have significantly different surface color distributions. The 5:3 and 7:4 resonances have semimajor axes near the middle of the main Kuiper Belt and both are dominated by ultra-red material (spectral gradient: S 25). The 5:3 and 7:4 resonances have statistically the same color distribution as the low-inclination "cold" classical belt. The inner 4:3 and distant 5:2 resonances have objects with mostly moderately red colors (S ~ 15), similar to the scattered and detached disk populations. The 2:1 resonance, which is near the outer edge of the main Kuiper Belt, has a large range of colors with similar numbers of moderately red and ultra-red objects at all inclinations. The 2:1 resonance was also found to have a very rare neutral colored object showing that the 2:1 resonance is really a mix of all object types. The inner 3:2 resonance, like the outer 2:1, has a large range of objects from neutral to ultra-red. The Neptune Trojans (1:1 resonance) are only slightly red (S ~ 9), similar to the Jupiter Trojans. The inner 5:4 resonance only has four objects with measured colors but shows equal numbers of ultra-red and moderately red objects. The 9:5, 12:5, 7:3, 3:1, and 11:3 resonances do not have reliable color distribution statistics since few objects have been observed in these resonances, though it appears noteworthy that all three of the measured 3:1 objects have only moderately red colors, similar to the 4:3 and 5:2 resonances. The different color distributions of objects in mean motion resonance with Neptune are likely a result from the disruption of the primordial Kuiper Belt from the scattering and migration of the giant planets. The few low-inclination objects known in the outer 2:1 and 5:2 resonances are mostly only moderately red. This suggests if the 2:1 and 5:2 have a cold low-inclination component, the objects likely had a significantly different origin than the ultra-red-dominated cold components of the cold classical belt and 5:3 and 7:4 resonances.
机译:获得了与海王星平均运动共振的58个物体的光学颜色。发现各种海王星共振种群具有明显不同的表面颜色分布。 5:3和7:4共振在主柯伊伯带中间附近具有半长轴,并且两者均由超红色材料控制(光谱梯度:S 25)。 5:3和7:4共振在统计上与低倾斜“冷”经典传送带具有相同的颜色分布。内部4:3和遥远的5:2共振的物体大多具有中等红色(S〜15),类似于散布和分离的磁盘种群。 2:1共振位于主柯伊伯带的外边缘附近,具有多种颜色,在所有倾角处都有相似数量的中等红色和超红色物体。还发现2:1共振具有非常罕见的中性色物体,表明2:1共振实际上是所有物体类型的混合。内部的3:2共振与外部的2:1一样,具有从中性到超红色的各种物体。海王星木马(1:1共振)仅略带红色(S〜9),类似于木星木马。内部5:4共振仅具有四个具有测量颜色的对象,但显示相等数量的超红色和中等红色的对象。 9:5、12:5、7:3、3:1和11:3共振没有可靠的颜色分布统计数据,因为在这些共振中几乎没有观察到物体,尽管似乎值得注意的是,所有三个实测3 :1物体仅具有适度的红色,类似于4:3和5:2共振。在与海王星的平均运动共振中,物体的不同颜色分布可能是由于巨型行星的散射和迁移破坏了原始柯伊伯带所致。在外部2:1和5:2共振中已知的少数低倾角物体大多只是中等红色。这表明如果2:1和5:2具有冷的低倾角分量,则这些物体的起源可能与经典古典带的超红色主导的冷分量明显不同,并且具有5:3和7:4的共振。

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