用Flyeye望远镜进行巡天观测的模拟
Simulation of Sky Surveys with the Flyeye Telescope
摘要：
欧空局的Flyeye望远镜设计有一个非常大的视场（FoV），以便扫描天空中的未知近地天体（NEO）。对于典型的40秒曝光时间，望远镜能够探测到极限星等高达21.5的物体。其目的是在撞击地球之前，观测那些将在几周或几天内撞击地球的近地天体。为了估计Flyeye望远镜对近地天体的探测率，利用NEOPOP软件创建了一个威胁地球的小行星综合群。然后，修改这些物体升交点的真实异常和异常，以产生约2500个撞击物。在模拟过程中，仅用一台Flyeye望远镜每年就可探测到近1米近地天体的近3次撞击。如果同时使用两台望远镜，一台在Monte Mufara，另一台在La Silla，预计每年可探测到四次撞击。尽管如此，据估计，大约15.6%的地球撞击物将很难被地面望远镜探测到，因为它们是从太阳接近我们的。
英文摘要：
ESA's Flyeye telescope is designed with a very large field of view (FoV) in order to scan the sky for unknown near-Earth Objects (NEOs). For typical exposure times of 40 s, the telescope is able to detect objects with a limiting magnitude up to 21.5. The aim is to observe those NEOs that are going to hit the Earth within a few weeks or days, in advance of impact. In order to estimate the detection rate of NEOs with the Flyeye telescope, a synthetic population of Earth threatening asteroids is created by means of the software NEOPOP. Then, the true anomalies and longitudes of the ascending node of these objects are modified in order to generate about 2500 impactors. In the simulations almost three impacts can be detected per year from NEOs down to 1 m using only one Flyeye telescope. When operating two telescopes simultaneously, one at Monte Mufara and one at La Silla, four detected impacts per year are expected. Nonetheless, it is estimated that about 15.6% of the Earth impactors will be very difficult to be detected using ground-based telescopes due to the fact that they are approaching us from the Sun.
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。
