Observational Limits on a Distant Cold Kuiper Belt
Observational Limits on a Distant Cold Kuiper Belt
复制标题
遥远的冷柯伊伯带的观测极限
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
R. Malhotra
中科院分区：
文献类型：
--
作者：
R. L. Allen;G. Bernstein;R. Malhotra
几乎所有已知的500多个柯伊伯带天体（KBO）都是在距离太阳50 Au以内发现的。对于观测到的50 Au以外的柯伊伯带的缺乏，一个可能的解释是，遥远的柯伊伯带在动力学上非常冷，因此在天空中足够薄，可以在以前的深测量场之间滑动。我们已经完成了一项调查，旨在寻找一个动力冷遥远的柯伊伯带附近的太阳系不变的平面。在2.3度2，我们已经发现了33 KBO和1半人马座，但没有超过50 Au的圆形轨道的对象。我们发现，在95%CL时，如果远盘的厚度小于σ = 1.°75，则可以排除远盘的存在，远盘相对于不变平面的倾角i ≤ 1°，其包含的D > 185 km的KBO的数量是观测到的内柯伊伯带的1.2倍以上，其范围在50 ~ 60 Au之间。
Almost all the more than 500 known Kuiper belt objects (KBOs) have been discovered within 50 AU of the Sun. One possible explanation for the observed lack of KBOs beyond 50 AU is that the distant Kuiper belt is dynamically very cold and thus thin enough on the sky to have slipped between previous deep survey fields. We have completed a survey designed to search for a dynamically cold distant Kuiper belt near the invariable plane of the solar system. In 2.3 deg2 we have discovered a total of 33 KBOs and 1 Centaur, but no objects in circular orbits beyond 50 AU. We find that we can exclude at 95% CL the existence of a distant disk inclined by i ≤ 1° to the invariable plane and containing more than 1.2 times as many D > 185 km KBOs between 50 and 60 AU as the observed inner Kuiper belt, if the distant disk is thinner than σ = 1.°75.