Dynamical limits on dark mass in the outer solar system
Dynamical limits on dark mass in the outer solar system
复制标题
外太阳系暗质量的动力学限制
DOI：
10.1086/115849
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
S. Tremaine
中科院分区：
文献类型：
--
作者：
D. Hogg;G. Quinlan;S. Tremaine
在对暗物质及其最小可探测量进行动力学搜索和确定观测异常的意义时，考虑了具有已知观测误差的简化模型太阳系。本文详细地数值分析了暗物质对外行星和彗星轨道的动力学影响。大多数结论是基于对四颗巨行星的观测，其中纬度和经度的观测误差是具有标准差的独立高斯变量。海王星的轨道周期很长，无法用现代星历表预测，也没有证据表明这颗行星有暗物质存在。当观测值拟合到考虑暗物质的模型时，研究拟合的改进被发现是检测暗物质的有效方法。行星X的质量必须超过最小可探测质量的10倍，才能找到假设的行星。有人认为，如果行星X的质量如此之大，距离如此之近，以至于它会动态地影响外行星，那么红外天文望远镜的观测应该已经定位了它。彗星的轨道残差被发现比行星的轨道残差更有效地探测柯伊伯带。参考文献35篇。
Simplified model solar systems with known observational errors are considered in conducting a dynamical search for dark mass and its minimum detectable amount, and in determining the significance of observed anomalies. The numerical analysis of the dynamical influence of dark mass on the orbits of outer planets and comets is presented in detail. Most conclusions presented are based on observations of the four giant planets where the observational errors in latitude and longitude are independent Gaussian variables with a standard deviation. Neptune's long orbital period cannot be predicted by modern ephemerides, and no evidence of dark mass is found in considering this planet. Studying the improvement in fit when observations are fitted to models that consider dark mass is found to be an efficient way to detect dark mass. Planet X must have a mass of more than about 10 times the minimum detectable mass to locate the hypothetical planet. It is suggested that the IRAS survey would have already located the Planet X if it is so massive and close that it dynamically influences the outer planets. Orbital residuals from comets are found to be more effective than those from planets in detecting the Kuiper belt. 35 refs.