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...
Metal-Enriched Outflows in the Ultra-Luminous infrared Quasar Q1321+058 (2009)
Wang, Tinggui, Zhou, Hongyan, Yuan, Weimin, Lu, Honglin, Dong, Xiaobo, Shan, Hongguang
Quasar outflows may play important role in the evolution of its host galaxy and central black hole. In this paper, we present a detailed study of multiple outflows in the obscured ultra-luminous...
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...
Mei, Lin, Yuan, Weimin, Dong, Xiaobo
Active galactic nuclei (AGN) in low surface brightness galaxies (LSBGs) have received little attention in previous studies. In this paper, we present detailed spectral analysis of 194 LSBGs from the...
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, ...
Quasi-Simultaneous Two Band Optical Micro-Variability of Luminous Radio-Quiet QSOs (2008)
We report the first results of quasi-simultaneous two passband optical monitoring of six quasi-stellar objects to search for micro-variability. We carried out photometric monitoring of these sources...
Broad-line Balmer decrements in blue active galactic nuclei (2008)
Dong, Xiaobo, Wang, Tinggui, Wang, Jianguo, Yuan, Weimin, Zhou, Hongyan, Dai, Haifeng, ...
Broad-line Balmer Decrements in Blue Active Galactic Nuclei (2007)
Dong, Xiaobo, Wang, Tinggui, Wang, Jianguo, Yuan, Weimin, Zhou, Hongyan, Dai, Haifeng, ...
We have investigated the broad-line Balmer decrements (Halpha/Hbeta) for a large, homogeneous sample of Seyfert 1 galaxies and QSOs using spectroscopic data obtained in the Sloan Digital Sky Survey....
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...
A narrow line Seyfert 1--blazar composite nucleus in 2MASX J0324+3410 (2007)
Zhou, Hongyan, Wang, Tinggui, Yuan, Weimin, Shan, Hongguang, Komossa, Stefanie, Lu, Honglin, ...
We report the identification of 2MASX J032441.19+341045.9 (hereafter 2MASX J0324+3410) with an appealing object which shows the dual properties of both a narrow line Seyfert 1 galaxy (NLS1) and a...
A narrow-line Seyfert 1-blazar composite nucleus in 2MASX J0324+3410 (2007)
Zhou, Hongyan, Wang, Tinggui, Yuan, Weimin, Shan, Hongguang, Komossa, Stefanie, Lu, Honglin, ...
Systematic study of a large sample of NLS1 galaxies from SDSS: first results (2006)
Yuan, Weimin, Zhou, Hongyan, Wang, Tinggui, Dong, Xiaobo, Lu, Honglin, Wang, Junxian, ...
This proceedings contribution summarizes first results obtained from a systematic study of 2011 NLS1 galaxies, as presented in Zhou et al. (2006, ApJS 166, 128). The sample was compiled by examining...
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...
Zhou, Hongyan, Wang, Tinggui, Yuan, Weimin, Lu, Honglin, Dong, Xiaobo, Wang, Junxian, ...
This is the first paper in a series dedicated to the study of the emission-line and continuum properties of narrow line Seyfert 1 galaxies (NLS1s). We carried out a systematic search for NLS1s from...
A systematic search of highly variable X-ray sources with the XMM-Newton serendipitous survey (2006)
Yuan, Weimin, Osborne, Julian P., Watson, Mike G., Komossa, Stefanie
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...