238 citations · 3.4k across the 57 of their papers we have counts for
10 papers · 1 filter
Supermassive black holes with high accretion rates in active galactic nuclei: I. First results from a new reverberation mapping campaign
P. Du, C. Hu, K. -X. Lu +7
We report first results from a large project to measure black hole (BH) mass in high accretion rate active galactic nuclei (AGNs). Such objects may be different from other AGNs in…
Super-Eddington accreting massive black holes as long-lived cosmological standards
J. -M. Wang, P. Du, D. Valls-Gabaud +2
Super-Eddington accreting massive black holes (SEAMBHs) reach saturated luminosities above a certain accretion rate due to photon trapping and advection in slim accretion disks. We…
Two-Component Structure of the Hbeta Broad-Line Region in Quasars. I. Evidence from Spectral Principal Component Analysis
Chen Hu, Jian-Min Wang, Luis C. Ho +3
We report on a spectral principal component analysis (SPCA) of a sample of 816 quasars, selected to have small Fe II velocity shifts with spectral coverage in the rest wavelength r…
Spectral variability of FIRST bright QSOs with SDSS observations
Wei-Hao Bian, Li Zhang, Richard Green +1
For some samples, it has been shown that spectra of QSOs with low redshift are bluer during their brighter phases. For the FIRST bright QSO sample, we assemble their spectra from S…
Double-peaked narrow emission-line galaxies from Sloan Digital Sky Survey. I. Sample and basic properties
Jun-Qiang Ge, Chen Hu, Jian-Min Wang +2
Recently, much attention has been given to double-peaked narrow emission-line galaxies, some of which are suggested to be related with merging galaxies. We make a systematic search…
Intervening BLR Clouds' Effects on Optical/UV Spectrum
Ye Wang, Gary J. Ferland, Chen Hu +2
Recent x-ray observations of Mrk 766 suggest that broad emission line region clouds cross our line of sight and produce variable x-ray absorption. Here we investigate what optical/…