Study and application of the resonant secular dynamics beyond Neptune
Study and application of the resonant secular dynamics beyond Neptune
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海王星以外的共振长期动力学的研究和应用
DOI：
10.1007/s10569-016-9735-7
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发表时间：
2016
影响因子：
1.6
通讯作者：
G. Valsecchi
中科院分区：
文献类型：
--
作者：
M. Saillenfest;M. Fouchard;G. Tommei;G. Valsecchi
我们使用一个长期的表象来描述与海王星的平均运动共振中的跨NepTunian天体的长期动力学。Saillenfest等人对所应用的模型进行了详细的描述。(Celest Mech Dyn Astron，DOI：10.1007/s10569-0169700-5,2016年)。对参数空间进行了系统的研究，结果表明，系统的长期轨迹与共振阶数关系不大。报告了近日点距离的高幅度振荡，并将其定位于轨道参数空间。特别是，我们证明了较大的近日点距离不是宣布一个物体从行星上分离的充分标准。然而，这样的机制被发现无法解释SEDNA的轨道，或者没有足够的倾斜度(考虑到它们的近日点距离很高)，不可能受到这样的共振动力学的驱动。长期的表示突出了高近日点累积带的存在，这是由于类型1：与海王星的共振造成的。该地区被发现大致位于阿陶、非盟和。除了直接来自散射盘的天体通量外，数值模拟还表明奥尔特云也是这类天体的重要来源。自然，由于这一机制依赖于高阶共振中的脆弱捕获，我们的结论在存在重大外部扰动的情况下会崩溃。因此，探测到这样一个蓄水池可能会成为探测外部太阳系的观测制约因素。
We use a secular representation to describe the long-term dynamics of transneptunian objects in mean-motion resonance with Neptune. The model applied is thoroughly described in Saillenfest et al. (Celest Mech Dyn Astron, doi: 10.1007/s10569-016-9700-5 , 2016). The parameter space is systematically explored, showing that the secular trajectories depend little on the resonance order. High-amplitude oscillations of the perihelion distance are reported and localised in the space of the orbital parameters. In particular, we show that a large perihelion distance is not a sufficient criterion to declare that an object is detached from the planets. Such a mechanism, though, is found unable to explain the orbits of Sedna or, which are insufficiently inclined (considering their high perihelion distance) to be possibly driven by such a resonant dynamics. The secular representation highlights the existence of a high-perihelion accumulation zone due to resonances of type 1:kwith Neptune. That region is found to be located roughly atAU,AU and. In addition to the flux of objects directly coming from the Scattered Disc, numerical simulations show that the Oort Cloud is also a substantial source for such objects. Naturally, as that mechanism relies on fragile captures in high-order resonances, our conclusions break down in the case of a significant external perturber. The detection of such a reservoir could thus be an observational constraint to probe the external Solar System.