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arXiv 0810.2296astro-ph
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D> 10 km柯伊伯带天体的尺度分布

The Size Distribution of Kuiper belt objects for D> 10 km

W. C. Fraser, J. J. Kavelaars

摘要:

我们使用斯巴鲁望远镜上的Suprime-cam对覆盖天空1/3平方度的柯伊伯带进行了调查,极限星等为m(R)~ 26.8(50%阈值),并发现了36个新的KBO。我们已经证实了柯伊伯带的光度函数必须像以前观察到的那样破裂(Bernstein et al. 2004; Fuentes & Holman 2008)。从光度函数中,我们推断出了基本的大小分布,并发现它与一个大天体的幂律斜率q1~4.8相一致,在天体直径Db~60 km处,假设6%的负折射率,斜率q2~1.9。我们没有发现确凿的证据表明,KBO的大小分布与倾角i <5 is different than that of those with i>5。我们讨论了这种测量的早期吸积在太阳系外和海王星迁移的情况下的影响。

英文摘要:

We have performed a survey of the Kuiper belt covering ~ 1/3 a square degree of the sky using Suprime-cam on the Subaru telescope, to a limiting magnitude of m(R)~ 26.8 (50% threshold) and have found 36 new KBOs. We have confirmed that the luminosity function of the Kuiper belt must break as previously observed (Bernstein et al. 2004; Fuentes & Holman 2008). From the luminosity function, we have inferred the underlying size distribution and find that it is consistent with a large object power-law slope q1~4.8 that breaks to a slope q2~1.9 at object diameter Db~60 km assuming 6% albedos. We have found no conclusive evidence that the size distribution of KBOs with inclinations i<5 is different than that of those with i>5. We discuss implications of this measurement for early accretion in the outer solar system and Neptune migration scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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