Estimating Black Hole Masses in Active Galactic Nuclei Using the MgII 2800 Emission Line (2009)
Wang, Jian-Guo, Dong, Xiao-Bo, Wang, Ting-Gui, Ho, Luis C., Yuan, Weimin, Wang, Huiyuan, ...
We investigate the relationship between the linewidths of broad Mg II \lambda2800 and Hbeta in active galactic nuclei (AGNs) to refine them as tools to estimate black hole (BH) masses. We perform a...
Eddington ratio governs the equivalent width of MgII emission line in active galactic nuclei (2009)
Dong, Xiao-Bo, Wang, Ting-Gui, Wang, Jian-Guo, Fan, Xiaohui, Wang, Huiyuan, Zhou, Hongyan, ...
We have investigated the ensemble regularities of the equivalent widths (EWs) of MgII 2800 emission line of active galactic nuclei (AGNs), using a uniformly selected sample of 2092 Seyfert 1 galaxies...
Eddington ratio governs the equivalent width of Mg II emission line in active galactic nuclei (2009)
Dong, Xiao-Bo, Wang, Ting-Gui, Wang, Jian-Guo, Fan, Xiaohui, Wang, Huiyuan, Zhou, Hongyan, ...
Broad reprocessed Balmer emission from warped accretion discs (2008)
Wu, Sheng-Miao, Wang, Ting-Gui, Dong, Xiao-Bo
Double peaked broad emission lines in active galactic nuclei are generally considered to be formed in an accretion disc. In this paper, we compute the profiles of reprocessing emission lines from a...
Hybrid nature of 0846+51W1: a BL Lac object with a narrow line Seyfert 1 nucleus (2004)
Zhou, Hong-Yan, Wang, Ting-Gui, Dong, Xiao-Bo, Li, Cheng, Zhang, Xue-Guang
We have found a NLS1 nucleus in the extensively studied eruptive BL Lac, 0846+51W1, out of a large sample of NLS1 compiled from the spectroscopic dataset of SDSS DR1. Its optical spectrum can be well...
Partially obscured quasars in the Sloan Digital Sky Survey Early Data Release (2004)
Dong, Xiao-Bo, Zhou, Hong-Yan, Wang, Ting-Gui, Wang, Jun-Xian, Li, Cheng, Zhou, You-Yuan
We have compiled a sample of 21 low redshift (z < 0.3), luminous active galactic nuclei (AGN) with large Balmer decrements (Halpha/Hbeta > 7) using the galaxy and QSO catalogs of the Sloan Digital...
Empirical modeling of the stellar spectrum of galaxies (2004)
Li, Cheng, Wang, Ting-Gui, Zhou, Hong-Yan, Dong, Xiao-Bo, Cheng, Fu-Zhen
An empirical method of modeling the stellar spectrum of galaxies is proposed, based on two successive applications of Principal Component Analysis (PCA). PCA is first applied to the newly available...