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...
Zhang, Xue-GUang, Dultzin, Deborah, Wang, Ting-Gui, Kaufmann, Guinevere
We present a new model to explain the appearance of red/blue-shifted broad low-ionization emission lines, especially emission lines in optical band, which is commonly considered as an indicator of...
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...
The Correlation Between Spectral Index And Accretion Rate For AGN (2008)
Zhang, Xue-Guang, Dultzin, Deborah, Wang, Ting-Gui
In this paper, we present a correlation between the spectral index distribution (SED) and the dimensionless accretion rate defined as $\dot{m}={L_{bol}/L_{Edd}}$ for AGN. This quantity is used as a...
Iron line profiles and self-shadowing from relativistic thick accretion discs (2007)
Wu, Sheng-Miao, Wang, Ting-Gui
We present Fe Kalpha line profiles from and images of relativistic discs with finite thickness around a rotating black hole using a novel code. The line is thought to be produced by iron fluorescence...
Iron Line Profiles from Relativistic Thick Accretion Disk (2007)
Wu, Sheng-Miao, Wang, Ting-Gui
We present a new code for calculating the Fe Kalpha line profiles from relativistic accretion disks with finite thickness around a rotating black hole. The thin Keplerian accretion disk must become...
Zhang, Xue-Guang, D., Dultzin-Hacyan, Wang, Ting-Gui
In this paper we study the object SDSS J1130+0058 which is the only AGN known to have both double-peaked low-ionization broad emission lines, and also X-shaped radio structures. Emission from an...
Metal Enriched Outflows and Dusty starburst in the type II quasar Q 1321+058 (2007)
Wang, Ting-Gui, Zhou, Hongyan, Lu, Honglin, Yuan, Weimin, Shan, Hongguang, Dong, Xiaobo
We present an analysis of the emission line property and the broad band spectral energy distribution of the ultra-luminous infrared Type II quasar Q132+058. The optical and ultraviolet emission lines...
The sizes of BLRs and BH masses of double-peaked broad low-ionization emission line objects (2007)
Zhang, Xue-Guang, Deborah, Dultzin-Hacyan, Wang, Ting-Gui
In this paper, the sizes of the BLRs and BH masses of DouBle-Peaked broad low-ionization emission line emitters (dbp emitters) are compared using different methods: virial BH masses vs BH masses from...
Polarization of Quasars: Rotated and Funnel-shaped Outflow (2006)
Wang, Hui-Yuan, Wang, Ting-Gui, Wang, Jun-Xian
Polarization is a useful probe to investigate the geometries and dynamics of outflow in BAL QSOs. We perform a Monte-Carlo simulation to calculate the polarization produced by resonant and electron...
The properties of optical FeII emission lines of AGN with double-peaked broad emission lines (2006)
Zhang, Xue-Guang, Deborah, Dultzin-Hacyan, Wang, Ting-Gui
We study the FeII properties of double-peaked broad low-ionization emission line AGN (dbp emitters) using a sample of 27 dbp emitters from SDSS (DR4), with mean value...
A physical model for active galactic nuclei with double-peaked broad emission lines (2006)
The double-peaked broad emission lines are usually thought to be linked to accretion disks, however, the local viscous heating in the line-emitting disk portion is usually insufficient for the...
Polarization of Quasars: Electron Scattering in the Broad Absorption Line Region (2005)
Wang, Hui-Yuan, Wang, Ting-Gui, Wang, Jun-Xian
It is widely accepted that the broad absorption line region (BALR) exists in most (if not all) quasars with a small covering factor. Recent works showed that the BALR is optically thick to soft and...
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...
The unique rapid variabilities of the iron K$\alpha$ line profiles in NGC 4151 (2000)
Wang, Jun-xian, Wang, Ting-gui, Zhou, You-yuan
We present a detailed analysis of the iron K$\alpha$ line variabilities in NGC 4151 by using long ASCA observation data obtained in May 1995. Despite the relatively small amplitude variations in the...
Wang, Ting-Gui, Lu, You-Jun, Zhou, You-Yuan
Anisotropic emission of the ionizing continuum is a general prediction of the accretion disk models. In this paper, we present the results of correlation analysis of the UV emission line and UV to...