与Janus和Epimetheus共轨的粒子：萤火虫行星环
Particles co-orbital to Janus and Epimetheus: a firefly planetary ring
摘要：
卡西尼号宇宙飞船发现了一个新的独特的环，它与土星的共同轨道卫星Janus和Epimetheus共享轨道。通过图像分析，我们发现这是一个连续的环。它的宽度比之前宣布的要大30%到50%。我们还证实了戒指的行为像萤火虫。只有当卡西尼号、光环和太阳以特定的几何构型排列时，才能不时地看到它。否则，它仍然“在黑暗中”，卡西尼号的相机看不到。通过数值模拟，我们发现环粒子的寿命很短，不到几十年。因此，戒指需要不断地补充。使用微陨石对Janus和Epimetheus表面的影响产生的颗粒模型，我们重现了环，解释了它的存在和“萤火虫”的行为。
英文摘要：
The Cassini spacecraft found a new and unique ring that shares the trajectory of Janus and Epimetheus, co-orbital satellites of Saturn. Performing image analysis, we found this to be a continuous ring. Its width is between 30% and 50% larger than previously announced. We also verified that the ring behaves like a firefly. It can only be seen from time to time, when Cassini, the ring and the Sun are arranged in a particular geometric configuration, in very high phase angles. Otherwise, it remains "in the dark", not visible to Cassini's cameras. Through numerical simulations, we found a very short lifetime for the ring particles, less than a couple of decades. Consequently, the ring needs to be constantly replenished. Using a model of particles production due to micrometeorites impacts on the surfaces of Janus and Epimetheus, we reproduce the ring, explaining its existence and the "firefly" behavior.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
