论文标题
预期的片段分布从第一个星际流星首绝2014-01-08
Expected Fragment Distribution from the First Interstellar Meteor CNEOS 2014-01-08
论文作者
论文摘要
2014年，在巴布亚新几内亚北部海岸发现了第一个星际流星木炭2014-01-08（IM1）（IM1）的火球（Siraj＆Loeb 2019）。最近宣布的海洋探险队将通过在10公里x x 10公里的海底区域拖曳磁性雪橇来检索任何现有的碎片，距马努斯岛以北约300公里（Siraj，Loeb，＆Gallaudet 2022）。我们制定了一个模型，该模型既包括片段事件后立即包含流星片段的概率质量分布，碎片的消融以及沿块状碎片云的地面轨迹轨迹的燃料后片段的地理分布。我们将此模型应用于IM1，以提供通过蒙特卡洛模拟构建的影响器的撞击后碎片质量分布的启发式估计。我们发现，根据影响器的经验屈服强度，预计有望在质量$ \ geq $ .001 g的消融中生存约8％至21％的碎片。我们还提供了通心后片段地理分布的估计。
In 2014, the fireball of the first interstellar meteor CNEOS 2014-01-08 (IM1) (Siraj & Loeb 2019), was detected off the northern coast of Papua New Guinea. A recently announced ocean expedition will retrieve any extant fragments by towing a magnetic sled across a 10 km x 10 km area of ocean floor approximately 300 km north of Manus Island (Siraj, Loeb, & Gallaudet 2022). We formulate a model that includes both the probabilistic mass distribution of meteor fragments immediately after the fragmentation event, the ablation of the fragments, and the geographic distribution of post-ablation fragments along the ground track trajectory of the bulk fragment cloud. We apply this model to IM1 to provide a heuristic estimate of the impactor's post-ablation fragment mass distribution, constructed through a Monte Carlo simulation. We find between ~8% and ~21% of fragments are expected to survive ablation with a mass $\geq$ .001 g, depending on the impactor's empirical yield strength. We also provide an estimation for the geographic distribution of post-ablation fragments.
