A CAREFULLY CHARACTERIZED AND TRACKED TRANS-NEPTUNIAN SURVEY: THE SIZE DISTRIBUTION OF THE PLUTINOS AND THE NUMBER OF NEPTUNIAN TROJANS
A CAREFULLY CHARACTERIZED AND TRACKED TRANS-NEPTUNIAN SURVEY: THE SIZE DISTRIBUTION OF THE PLUTINOS AND THE NUMBER OF NEPTUNIAN TROJANS
复制标题
仔细描述和跟踪的海王星外调查：冥王星的大小分布和海王星特洛伊木马的数量
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
R. Pike
中科院分区：
文献类型：
--
作者：
M. Alexandersen;M. Alexandersen;B. Gladman;J. Kavelaars;J. Petit;S. Gwyn;C. Shankman;R. Pike;R. Pike
跨海王星天体(TNOs)在其轨道和大小分布中保存了行星形成过程的证据。虽然所有的种群都显示出较大的天体大小分布，但海王星特洛伊木马和直径为100公里的散射体的相对不足已经被检测到。我们用32平方度的调查研究了这一缺陷，在调查中我们检测到77个TNO的亮度超过了R波段的极限星等24.6。我们的冥王星样本(18个天体在与海王星的3：2平均运动共振中)显示D<；100千米天体的缺陷，在>；99%的置信度下拒绝了单一的幂定律大小分布。结合我们的调查和加拿大-法国的黄道平面调查，我们对冥王星大小分布的允许参数进行了详细的分析，包括膝盖和草皮。我们推测存在9,000±3,000个深渊，其绝对震级为HR≤8.66，HR≤为10.0(95%置信度)。我们的调查还发现了一个临时的天王星特洛伊木马，一个临时的海王星特洛伊木马和一个稳定的海王星特洛伊木马，我们分别估计了、和HR≤10.0的数量。因此，这三个种群的数量都少于主带小行星(592颗小行星的HR≤为10.0)。有了这样的种群规模，临时的海王星特洛伊木马不可能是以前稳定的特洛伊木马，现在正在从共振中扩散；它们一定是最近捕获的半人马或散布的物体。随着对物体探测的偏见随着更大的半长轴的增加，我们发现了三个3：1谐振器和一个4：1谐振器，进一步证明了高阶共振的数量远远超过了通常预测的数量。
The trans-Neptunian objects (TNOs) preserve evidence of planet building processes in their orbital and size distributions. While all populations show steep size distributions for large objects, a relative deficit of Neptunian trojans and scattering objects with diameters of D < 100 km has been detected. We investigated this deficit with a 32 square degree survey, in which we detected 77 TNOs that are brighter than a limiting r-band magnitude of 24.6. Our plutino sample (18 objects in 3:2 mean-motion resonance with Neptune) shows a deficit of D < 100 km objects, rejecting a single power-law size distribution at >99% confidence. Combining our survey with the Canada–France Ecliptic Plane Survey, we perform a detailed analysis of the allowable parameters for the plutino size distribution, including knees and divots. We surmise the existence of 9000 ± 3000 plutinos with an absolute magnitude of Hr ≤ 8.66 and with Hr ≤ 10.0 (95% confidence). Our survey also discovered one temporary Uranian trojan, one temporary Neptunian trojan, and one stable Neptunian trojan, for which we estimate populations of , , and with Hr ≤ 10.0, respectively. All three populations are thus less numerous than the main belt asteroids (592 asteroids with Hr ≤ 10.0). With such population sizes, the temporary Neptunian trojans cannot be previously stable trojans diffusing out of the resonance now; they must be recently captured Centaurs or scattering objects. As the bias against the detection of objects grows with larger semimajor axes, our discovery of three 3:1 resonators and one 4:1 resonator adds to the growing evidence that the high-order resonances are far more populated than is typically predicted.