The Structure of the Broad-Line Region in Active Galactic Nuclei

[摘要][AST-9420080]活动星系核（AGN）光谱中宽发射谱线的变异性揭示了有关发射谱线区域的结构和运动学以及中心源性质的基本信息。宽发射线出现在被中心连续体源光电离的云中，并对连续体通量的变化作出响应，但由于光传播时间的延迟；宽线区域的结构和速度场可以通过密切监测发射线的响应来确定，因为该区域响应于连续体变化而发生混响，对有限数量的源进行重复观测。作为国际AGN观察的一部分，这是一个正在进行的项目。

Abstract AST-9420080 Peterson, Bradley M. . The variability of the broad emission lines in the spectra of active galactic nuclei (AGN) reveals fundamental information about the structure and kinematics of the line-emitting region and about the nature of the central source. Broad emission lines arise in clouds that are photoionized by a central continuum source and respond to variations in the continuum flux with a delay due to light-travel time; the structure and velocity field of the broad-line region can be determined by closely monitoring the response of the emission lines as the region reverberates in response to the continuum variations, making repeated observations of a limited number of sources. This is an ongoing project, as part of the International AGN Watch.