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...
The spin and orientation of dark matter halos within cosmic filaments (2009)
Zhang, Youcai, Yang, Xiaohu, Faltenbacher, Andreas, Springel, Volker, Lin, Weipeng, Wang, Huiyuan
Clusters, filaments, sheets and voids are the building blocks of the cosmic web. In this study, we present and compare two distinct algorithms for finding cosmic filaments and sheets, a task which is...
What controls the FeII strength in active galactic nuclei? (2009)
Dong, Xiaobo, Wang, Jianguo, Wang, Tinggui, Wang, Huiyuan, Fan, Xiaohui, Zhou, Hongyan, ...
We have investigated the correlations of the equivalent widths (EWs) of narrow and broad FeII emission lines and the FeII/MgII intensity ratio with fundamental physical parameters of active galactic...
The origin and physical mechanism of the ensemble Baldwin effect (2009)
Dong, Xiaobo, Wang, Jianguo, Wang, Tinggui, Wang, Huiyuan, Fan, Xiaohui, Zhou, Hongyan, ...
We have conducted a systematic investigation of the origin and underlying physics of the line--line and line--continuum correlations of AGNs, particularly the Baldwin effect. Based on the homogeneous...
The Correlation between X-ray and UV Properties of BAL QSOs (2009)
Lulu Fan, HuiYuan Wang, Tinggui Wang, Junxian Wang, Xiaobo Dong, Kai Zhang, ...
We compile a large sample of broad absorption lines (BAL) quasars with X-ray observations from the \xmm archive data and Sloan Digital Sky Survey Data Release 5. The sample consists of 41 BAL QSOs....
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, ...
The distribution of ejected subhalos and its implication for halo assembly bias (2008)
Wang, Huiyuan, Mo, H. J., Jing, Y. P.
Using a high-resolution cosmological $N$-body simulation, we identify the ejected population of subhalos, which are halos at redshift $z=0$ but were once contained in more massive `host' halos at...
The Correlation between X-ray and UV Properties of BAL QSOs (2008)
Fan, LuLu, Wang, HuiYuan, Wang, Tinggui, Wang, Junxian, Dong, Xiaobo, Zhang, Kai, ...
We compile a large sample of broad absorption lines (BAL) quasars with X-ray observations from the \xmm archive data and Sloan Digital Sky Survey Data Release 5. The sample consists of 41 BAL QSOs....
XMM observations of BAL Quasars with polar outflows (2008)
Wang, Junxian, Jiang, Peng, Zhou, Hongyan, Wang, Tinggui, Dong, Xiaobo, Wang, Huiyuan
We have selected a sample of broad absorption line (BAL) quasars which show significant radio variations, indicating the presence of polar BAL outflows. We obtained snapshot XMM observations of four...
Broad-line AGNs with Candidate Intermediate-mass Black holes in the Sloan Digital Sky Survey (2006)
Dong, Xiaobo, Wang, Tinggui, Yuan, Weimin, Zhou, Hongyan, Shan, Hongguang, Wang, Huiyuan, ...
We have conducted a systematic search of AGNs with IMBHs from the SDSS DR4. As results we found 245 candidates of broad-line AGN with M_{BH}
SDSS J160531.84+174826.1: A Dwarf Disk Galaxy With An Intermediate-Mass Black Hole (2006)
Dong, Xiaobo, Wang, Tinggui, Yuan, Weimin, Shan, Hongguang, Zhou, Hongyan, Fan, Lulu, ...
We report the discovery of a dwarf Seyfert 1 active galactic nucleus (AGN) with a candidate intermediate-mass black hole hosted by the dwarf galaxy SDSS J160531.84+174826.1 at z=0.032. A broad...
Polar Outflows in Six Broad Absorption Line Quasars (2005)
Zhou, Hongyan, Wang, Tinggui, Wang, Huiyuan, Wang, Junxian, Yuan, Weimin, Lu, Yu
Using the radio observations by FIRST and NVSS, we build a sample of 151 radio variable quasars selected from the Sloan Digital Sky Survey Data Release 3 (SDSS DR3). Six (probably another two) among...