CFEPS探测的5：1海王星共振：动力学和人口
The 5:1 Neptune Resonance as Probed by CFEPS: Dynamics and Population
摘要：
加拿大-法国黄道面巡天发现了四个半长轴接近5：1共振的海王星外天体，揭示了大量以前未发现的固有人口。其中三个物体目前与海王星共振，第四个是在过去某个时候逃脱共振的物体。非共振物体可以代表在比5：1共振略低的半长轴处稳定的分离群体。我们产生克隆这些对象的restemptomatic的不确定性，并检查他们的行为超过4.5 Gyr的数值模拟。这三个共振天体的大多数克隆体（>90%）在4.5 Gyr的整合过程中总共花费了10^7年的共振时间;大多数克隆体经历了多次共振捕获。我们的动力学积分揭示了5：1共振，散射物体和其他大的半长轴共振，特别是4：1，6：1和7：1之间的交换。多次捕获事件和捕获后相对较短的共振寿命表明，这些物体是捕获的散射物体，坚持在5：1共振。这些5：1谐振器可以代表临时群体，需要来自源群体的定期贡献。我们研究了探测到的物体及其克隆体的动力学特性（倾角、偏心率、共振岛、天平动幅度），以便提供5：1共振轨道结构的经验模型。这种共振是动态热的，主要包括对称的库。根据我们的轨道模型，在5：1共振中探测这三个物体所需的固有粒子数为1900（+3300-1400，95%置信度），H_g为< 8 and e >0.5。
英文摘要：
The Canada-France Ecliptic Plane Survey discovered four trans-Neptunian objects with semi-major axes near the 5:1 resonance, revealing a large and previously undetected intrinsic population. Three of these objects are currently resonant with Neptune, and the fourth is consistent with being an object that escaped the resonance at some point in the past. The non-resonant object may be representative of a detached population that is stable at slightly lower semi-major axes than the 5:1 resonance. We generated clones of these objects by resampling the astrometric uncertainty and examined their behavior over a 4.5 Gyr numerical simulation. The majority of the clones of the three resonant objects (>90%) spend a total of 10^7 years in resonance during their 4.5 Gyr integrations; most clones experience multiple periods of resonance capture. Our dynamical integrations reveal an exchange between the 5:1 resonance, the scattering objects, and other large semi-major axis resonances, especially the 4:1, 6:1, and 7:1. The multiple capture events and relatively short resonance lifetimes after capture suggest that these objects are captured scattering objects that stick in the 5:1 resonance. These 5:1 resonators may be representative of a temporary population, requiring regular contributions from a source population. We examined the dynamical characteristics (inclination, eccentricity, resonant island, libration amplitude) of the detected objects and their clones in order to provide an empirical model of the orbit structure of the 5:1 resonance. This resonance is dynamically hot and includes primarily symmetric librators. Given our orbit model, the intrinsic population necessary for the detection of these three objects in the 5:1 resonance is 1900(+3300 -1400, 95% confidence) with H_g< 8 and e > 0.5.
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