Probability distributions for the magnification of quasars due to microlensing
Probability distributions for the magnification of quasars due to microlensing
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微透镜作用下类星体放大的概率分布
DOI：
10.1086/170987
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
J. Wambsganss
中科院分区：
文献类型：
--
作者：
J. Wambsganss
引力微透镜效应可以显著放大透镜类星体的通量，从而可能影响类星体源计数或观测到的类星体光度函数。本文给出了有限源引力微透镜放大概率的大量分布，并合理地覆盖了微透镜参数空间（即，表面质量密度、外部剪切、透镜化物体的质谱）。这些概率分布是从平滑的二维放大模式与高斯源配置文件。探索了不同的源尺寸，范围从10 exp 14 cm到5 x 10 exp 16 cm。概率分布显示出各种各样的形状。给出了大放大倍数下的拟合斜率系数。
Gravitational microlensing can magnify the flux of a lensed quasar considerably and therefore possibly influence quasar source counts or the observed quasar luminosity function. A large number of distributions of magnification probabilities due to gravitational microlensing for finite sources are presented, with a reasonable coverage of microlensing parameter space (i.e., surface mass density, external shear, mass spectrum of lensing objects). These probability distributions were obtained from smoothing two-dimensional magnification patterns with Gaussian source profiles. Different source sizes ranging from 10 exp 14 cm to 5 x 10 exp 16 cm were explored. The probability distributions show a large variety of shapes. Coefficients of fitted slopes for large magnifications are presented.