论文标题
Deimos轨道倾斜的过去火星环的证据
Evidence for a Past Martian Ring from the Orbital Inclination of Deimos
论文作者
论文摘要
我们从数值上探讨了火星卫星Deimos的大轨道倾斜的可能性，起源于轨道共振，而远古的火星卫星比凤凰城更大。我们发现，通过在3：1的3.3 Mars Radii的Deimos通过3：1的平均动作共振，Martian卫星的向外演变可以可靠地产生Deimos的倾向。从同步半径内的潮汐进化的相反方向上，这种向外的迁移需要与过去巨大的火星环相互作用。因此，我们的结果强烈支持Heslbrock和Minton（2017）的环状火星环卫星假说。我们的发现，结合了Hesselbrock和Minton（2017）的模型，表明Deimos表面的年龄约为3.5-4 GYR，要求Phobos年龄较小。
We numerically explore the possibility that the large orbital inclination of the martian satellite Deimos originated in an orbital resonance with an ancient inner satellite of Mars more massive than Phobos. We find that Deimos's inclination can be reliably generated by outward evolution of a martian satellite that is about 20 times more massive than Phobos through the 3:1 mean-motion resonance with Deimos at 3.3 Mars radii. This outward migration, in the opposite direction from tidal evolution within the synchronous radius, requires interaction with a past massive ring of Mars. Our results therefore strongly support the cyclic martian ring-satellite hypothesis of Hesselbrock and Minton (2017). Our findings, combined with the model of Hesselbrock and Minton (2017), suggest that the age of the surface of Deimos is about 3.5-4 Gyr, and require Phobos to be significantly younger.
