Monitoring AGNs with H$\beta$ Asymmetry. III. Long-term Reverberation Mapping Results of 15 Palomar-Green Quasars

分类： 天文学 >> 天文学 提交时间： 2023-02-19

Dong-Wei Bao Michael S. Brotherton Pu Du Jacob N. McLane T. E. Zastrocky Kianna A. Olson Feng-Na Fang Shuo Zhai Zheng-Peng Huang Kai Wang Bi-Xuan Zhao Sha-Sha Li Sen Yang Yong-Jie Chen Jun-Rong Liu Zhu-Heng Yao Yue-Chang Peng Wei-Jian Guo Yu-Yang Songsheng Yan-Rong Li

摘要： In this third paper of the series reporting on the reverberation mapping (RM) campaign of active galactic nuclei with asymmetric H$\beta$ emission-line profiles, we present results for 15 Palomar-Green (PG) quasars using spectra obtained between the end of 2016 to May 2021. This campaign combines long time spans with relatively high cadence. For 8 objects, both the time lags obtained from the entire light curves and the measurements from individual observing seasons are provided. Reverberation mapping of 9 of our targets has been attempted for the first time, while the results for 6 others can be compared with previous campaigns. We measure the H$\beta$ time lags over periods of years and estimate their black hole masses. The long duration of the campaign enables us to investigate their broad line region (BLR) geometry and kinematics for different years by using velocity-resolved lags, which demonstrate signatures of diverse BLR geometry and kinematics. The BLR geometry and kinematics of individual objects are discussed. In this sample, the BLR kinematics of Keplerian/virialized motion and inflow is more common than outflow.

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