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THE FREQUENCY OF BINARY KUIPER BELT OBJECTS

机译:二进制库伯带对象的频率

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摘要

We estimate the frequency of widely spaced (separations greater than 0.5″) Kuiper Belt binaries (KBBs) from surveys for new Kuiper Belt objects (KBOs) with the Deep Ecliptic Survey and through recovery observations for newly discovered KBOs at the Magellan telescopes. We find the frequency of KBBs versus discovery separation to be related by an inverse power law when combining our results with those for the fraction of close binaries (separations less than 0.5″) found in the literature. For wide separations, our data and the resulting model agree with the model proposed by Goldreich et al. in 2002. However, including the frequency at the smallest separation rules out the semimajor-axis dependence of the Goldreich et al. model at the 99% confidence level, indicating that there is likely a turnover in the distribution at very close separations, or that the number of close binaries has been underestimated. In either case, the binary-frequency distribution favors binary formation models invoking gravitational rather than physical interactions—such as those proposed by Goldreich et al. and Astakhov et al. (2005).
机译:我们通过深黄道勘测对新的柯伊伯带天体(KBO)进行调查,并通过麦哲伦望远镜对新发现的KBO的恢复观测,估计了宽间隔(大于0.5英寸)柯伊伯带双星(KBB)的频率。当将我们的结果与文献中发现的接近二元分数(分离度小于0.5英寸)的结果相结合时,我们发现KBB的频率与发现间隔之间的关系与逆幂定律有关。对于较大的分离,我们的数据和生成的模型与Goldreich等人提出的模型一致。然而,在2002年,包括最小间隔的频率排除了Goldreich等人的半长轴依赖性。如果模型在99%的置信水平上进行建模,则表明在非常接近的分离中分布中可能有周转率,或者接近的二进制数被低估了。无论哪种情况,二进制频率分布都倾向于使用重力而非物理相互作用的二进制形成模型,例如Goldreich等人提出的模型。和阿斯塔霍夫等。 (2005)。

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