Abstract We examine meteoroid orbits recorded by the Canadian Meteor Orbit Radar (CMOR) from 2012 to 2019, consisting of just over 11 million orbits in a search for potential interstellar meteoroids. Our 7.5 year survey consists of an integrated time-area product of ~ 7 × 106 ​km2 hours. Selecting just over 160000 six station meteor echoes having the highest measured velocity accuracy from within our sample, we found five candidate interstellar events. These five potential interstellar meteoroids were found to be hyperbolic at the 2σ-level using only their raw measured speed. Applying a new atmospheric deceleration correction algorithm developed for CMOR, we show that all five candidate events were likely hyperbolic at better than 3σ, the most significant being a 3.7σ detection. Assuming all five detections are true interstellar meteoroids, we estimate the interstellar meteoroid flux at Earth to be at least 6.6 × 10−7 meteoroids/km2/hr appropriate to a mass of 2 × 10−7kg. Using estimated measurement uncertainties directly extracted from CMOR data, we simulated CMOR’s ability to detect a hypothetical ‘Oumuamua - associated hyperbolic meteoroid stream. Such a stream was found to be significant at the 1.8σ level, suggesting that CMOR would likely detect such a stream of meteoroids as hyperbolic. We also show that CMOR’s sensitivity to interstellar meteoroid detection is directionally dependent.

中文翻译：

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加拿大流星轨道雷达探测到的可能的星际流星体

摘要 我们检查了加拿大流星轨道雷达 (CMOR) 从 2012 年到 2019 年记录的流星体轨道，包括超过 1100 万个轨道，以寻找潜在的星际流星体。我们的 7.5 年调查包括约 7 × 106 平方公里小时的综合时区积。从我们的样本中选择了超过 160000 个具有最高测量速度精度的六站流星回波，我们发现了五个候选星际事件。仅使用原始测量速度，就发现这五个潜在的星际流星体在 2σ 水平上是双曲线的。应用为 CMOR 开发的新大气减速校正算法，我们表明所有五个候选事件都可能在优于 3σ 的情况下双曲线，最重要的是 3.7σ 检测。假设所有五次探测都是真正的星际流星体，我们估计地球的星际流星体通量至少为 6.6 × 10−7 流星体/km2/hr，适合 2 × 10−7kg 的质量。使用直接从 CMOR 数据中提取的估计测量不确定性，我们模拟了 CMOR 检测假设的“Oumuamua”相关双曲流星体流的能力。发现这样的流在 1.8σ 水平上很重要，这表明 CMOR 可能会检测到这种流星体的双曲线流。我们还表明，CMOR 对星际流星体探测的敏感性是方向相关的。我们模拟了 CMOR 检测假设的“Oumuamua”相关双曲流星体流的能力。发现这样的流在 1.8σ 水平上很重要，这表明 CMOR 可能会检测到这种流星体的双曲线流。我们还表明，CMOR 对星际流星体探测的敏感性是方向相关的。我们模拟了 CMOR 检测假设的“Oumuamua”相关双曲流星体流的能力。发现这样的流在 1.8σ 水平上很重要，这表明 CMOR 可能会检测到这种流星体的双曲线流。我们还表明，CMOR 对星际流星体探测的敏感性是方向相关的。