AI 中文总结
该研究分析了透镜周盘掩蔽微引力透镜图像的光变曲线形态，指出其会导致致密天体探测偏差，建议检测管道纳入带盘透镜族群以准确刻画天体族群。
AI 中文摘要
微引力透镜巡天通常采用自动化标准，排除偏离时间对称、无色差的Paczyński曲线的光变曲线。在使用此类自动化检测管道的巡天中，透镜周物质对微引力透镜图像的掩蔽，可能导致对带有环或盘的致密天体族群的探测不足或分类错误。本研究刻画了一类光变曲线形态：大小、取向各异且相对于宿主透镜质量较低的均匀薄透镜周盘，可与微引力透镜事件期间产生的光线路径相交。这些形态类别与未被掩蔽光变曲线的残差平方配对。我们发现，在广泛的参数空间内，会出现与未被掩蔽微引力透镜曲线的显著偏差。该效应对可能存在盘或环系统的自由漂浮行星和褐矮星具有相关性。另一个潜在考量是，宇宙黑暗时代期间，原初黑洞（PBH）吸积形成的盘状吸积流，可能产生了重子物质的残余静盘。检测管道应设计为考虑带盘透镜族群，为在这些情境下潜在观测盘与环开辟此前未被充分利用的途径，并确保对族群的准确刻画。
英文摘要
Microlensing surveys typically apply automated criteria to exclude lightcurves that depart from time-symmetric and achromatic Paczyński curves. In surveys using such automated detection pipelines, occultation of microlensed images by circum-lens material could lead to underdetection or misclassification of ring- or disk-bearing compact object populations. This work characterizes the family of lightcurve morphologies by which uniform thin circum-lens disks of varying size and orientation, and low mass relative to their host lens, can intersect the ray paths produced during microlensing events. These morphology classes are paired with squared residuals relative to an unocculted lightcurve. We find that substantial deviations from an unocculted microlensing curve can occur across a wide range of parameter space. This effect holds relevance for free-floating planets and brown dwarfs where disks or ring systems can be present. Another potential consideration is that disk-shaped accretion flows onto primordial black holes (PBHs) during the cosmic dark ages could have resulted in remnant quiescent disks of baryonic material. Pipelines should be designed to account for disk-bearing lens populations, opening previously underutilized avenues to potentially observe disks and rings in these contexts and ensuring populations are accurately characterized.
Comments8 pages, 3 figures
