活动星系核Fe II及其它非氢发射线的反响映射研究

Reverberation mapping is an important method to study the geometry and dynamics of the broad line region of the active galactic nuclei, which are still poorly understood. Although Hbeta reverberation has been well observed and used for measuring the mass of the central massive black hole in about 60 objects, the detection of reverberation of Fe II and other non-hydrogen emission lines seldom succeed. The applicant developed a sophisticated spectral fitting scheme to improve the flux calibration and light curve measurement in reverberation mapping, which benifits the detection of the time lags of Fe II and other emission lines. This project plans to study the reverberation mapping of Fe II and other non-hydrogen emission lines by both reanalyzing archived data and making new observations, aims to greatly enlarge the number of detections of Fe II and other emission lines reverberation, and study the broad line region combining the results of all these lines.

活动星系核宽线区的几何和动力学仍然是缺乏深入理解的重要问题。反响映射是研究这一问题的重要观测方法。Hbeta的反响映射已经有约60个源的观测，并被用于测量中心黑洞的质量。但是，对Fe II以及其它发射线的反响映射观测却鲜有成功。申请人发展了一套基于细致的光谱拟合的方法，有效地提高了光谱流量定标和光变曲线测量精度，有助于测量Fe II及其它发射线的时间延迟。本项目计划利用公开的旧数据，同时进行新的观测，来进行Fe II及其它非氢发射线的反响映射研究。力图大量扩充有Fe II及其它发射线成功反响映射观测的样本数目，最终结合多发射线的观测结果来研究宽线区的物理性质。