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Asteroid Lightcurves and Detection, Shape, and Size Biases in Large-scale Surveys
Research Notes of the AAS Pub Date : 2021-05-14 , DOI: 10.3847/2515-5172/ac0059
Samuel Navarro-Meza 1, 2 , Erin Aadland 1, 3 , David Trilling 1
Affiliation  

Most asteroids are somewhat elongated and have non-zero lightcurve amplitudes. Such asteroids can be detected in large-scale sky surveys even if their mean magnitudes are fainter than the stated sensitivity limits. We explore the detection of elongated asteroids under a set of idealized but useful approximations. We find that objects up to 1 mag fainter than a survey’s sensitivity limit are likely to be detected, and that the effect is most pronounced for asteroids with lightcurve amplitudes 0.1–0.4 mag. This imposes a bias on the derived size and shape distributions of the population that must be properly accounted for.



中文翻译:

大规模调查中的小行星光曲线和检测、形状和尺寸偏差

大多数小行星都有些拉长,并且具有非零光曲线幅度。即使这些小行星的平均星等比规定的灵敏度限制更微弱,也可以在大规模的天空调查中检测到这些小行星。我们探索在一组理想化但有用的近似下探测细长的小行星。我们发现,可能会检测到比调查的灵敏度极限低 1 mag 的物体,并且这种影响对于光曲线幅度为 0.1-0.4 mag 的小行星最为明显。这对必须适当考虑的人口的派生大小和形状分布施加了偏差。

更新日期:2021-05-14
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