引力透镜点源四重像的芬奇“平-暗”关系的确认
Confirmation of the Finch Flatter-Fainter Relation for the Quadruple Images of Lensed Point Sources
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中文总结 AI 辅助
本文针对芬奇等人提出的引力透镜四重像总放大率与扁率的反比关系，利用39个引力透镜类星体样本（38个成功建模），采用预测放大率排除微引力透镜干扰，验证了该关系的有效性。
中文摘要 AI 辅助
芬奇等人（2002）在两种不同的等温引力势模型中，推导了引力透镜四重像的总绝对放大率随扁率呈反比变化的关系，但未阐述该“平-暗”关系在实际引力透镜系统中引发的选择效应。我们利用卢塔鲁等人（2021）的39个引力透镜类星体样本（其中38个成功建模）对该关系进行检验，采用预测放大率而非观测放大率以避免微引力透镜的复杂影响，结果发现，在观测到的扁率范围内，总预测放大率下降了10倍。
英文摘要
Finch et al (2002) derived relations for the summed absolute magnifications of quadruply lensed images that vary inversely with flattening in two alternative isothermal gravitational potential models. However, they did not elaborate on the selection effects this "flatter-fainter'' relation induces in actual lensed systems. We test the relation against the Luhtaru et al (2021) sample of 39 quadruply lensed quasars (38 of which we model successfully), using predicted rather than observed magnifications to avoid the complication of microlensing. We found that the summed predicted magnification decreases by a factor of ten over the observed range of flattening.
