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arXiv 2303.14766astro-ph.IMastro-ph.EPastro-ph.GA
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LSST对小于50米星际目标的探测率

Detection Rate of <50-meter Interstellar Objects with LSST

Carson Ezell, Abraham Loeb

摘要:

在过去的十年中,由于天文观测设备的进步,发现了前四个已知的星际物体。今后的巡天具有更高的灵敏度,可以更频繁地探测这类物体,包括越来越小的物体。我们考虑的能力的遗产调查的空间和时间(LSST)的维拉C。鲁宾天文台将在今后十年的运行期间探测小尺寸的星际物体。我们使用LSST的探测能力,并模拟直径在1- 50米范围内的星际物体的数量,以计算将被探测到的小型星际物体的预期数量。我们使用以前探测到的星际物体来校准我们的物体密度估计。我们还考虑人口的探测率的影响,考虑人口与两个单独的探测分布:一个恒定的探测0.06和一个探测分布,类似于近地小行星。我们发现,在我们考虑的直径范围内,检测的数量随着直径的增加而增加。我们估计LSST每两年运行一次的小ISO检测率将增加10倍,以便未来的调查更深入地扩展一个量级。

英文摘要:

The previous decade saw the discovery of the first four known interstellar objects due to advances in astronomical viewing equipment. Future sky surveys with greater sensitivity will allow for more frequent detections of such objects, including increasingly small objects. We consider the capabilities of the Legacy Survey of Space and Time (LSST) of the Vera C. Rubin Observatory to detect interstellar objects of small sizes during its period of operation over the next decade. We use LSST's detection capabilities and simulate populations of interstellar objects in the range of 1-50m in diameter to calculate the expected number of small interstellar objects that will be detected. We use previous detections of interstellar objects to calibrate our object density estimates. We also consider the impact of the population's albedo on detection rates by considering populations with two separate albedo distributions: a constant albedo of 0.06 and an albedo distribution that resembles near earth asteroids. We find that the number of detections increases with the diameter over the range of diameters we consider. We estimate a detection rate of up to a small ISO every two years of LSST's operation with an increase by a factor of ten for future surveys that extend a magnitude deeper.

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。

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