标题： 线宽和光谱指数分布作为活动星系宽线区轴对称性的证据 显示英文标题

标题： Line Width and Spectral Index Distributions as Evidence for Axisymmetry in the Broad Line Regions of Active Galaxies

摘要： 我们提出，活动星系核的宽线区的线宽与光度之间的散射是由于轴对称宽线区的视线方向依赖性引起的。 采用线宽作为光度和角度函数的简单模型，并将其与观测到的光度函数卷积，使我们能够预测与现有数据一致的线宽分布。 此外，我们利用线的等值宽度与连续谱光度之间的关系，预测了观测到的线宽与等值宽度之间的相关性。 此相关性的散射再次由角度依赖性提供。 我们还表明，观测角度的依赖性可以产生X射线谱指数分布。 这些结果在宽线区模型的诊断和宇宙学中有应用。 显示英文摘要

摘要： We propose that the scatter in line width versus luminosity of the BLR of AGN arises from a dependence on the line of sight to an axially symmetric BLR. Adopting a simple model for the line width as a function of luminosity and angle, and convolving this with the observed luminosity function, allows us to predict a line width distribution consistent with the available data. Furthermore, we use the relation between the equivalent width of a line and the luminosity in the continuum to predict an observed correlation between line width and equivalent width. The scatter on this correlation is again provided by angular dependence. We also show a viewing angle dependence can produce the X-ray spectral index distribution. The results have applications as diagnostics of models of the broad line region and in cosmology.