It is well known that reverberation mapping of active galactic nuclei (AGNs) reveals a
relationship between AGN luminosity and the size of the broad-line region, and that use of …

We present the final catalogue of the 2dF QSO Redshift Survey (2QZ), based on Anglo-
Australian Telescope 2dF spectroscopic observations of 44 576 colour-selected (ub J r) …

Virial black hole mass estimates are presented for 12 698 quasars in the redshift interval
0.1≤ z≤ 2.1, based on modelling of spectra from the Sloan Digital Sky Survey (SDSS) first …

We study the distribution of Eddington luminosity ratios, L bol/L Edd, of active galactic nuclei
(AGNs) discovered in the AGN and Galaxy Evolution Survey (AGES). We combine Hβ, Mg II …

In this paper we present a clustering analysis of quasi-stellar objects (QSOs) using over
20000 objects from the final catalogue of the 2dF QSO Redshift Survey (2QZ), measuring the …

The high-ionization lines in active galactic nuclei (AGN), such as C iv, tend to be blueshifted
with respect to the lower-ionization lines, such as Hβ, and often show a strong blue excess …

We investigate the relationship between the linewidths of broad Mg ii λ2800 and Hβ in active
galactic nuclei (AGNs) to refine them as tools to estimate black hole (BH) masses. We …

We investigate the relationship between black hole mass, M BH, and host galaxy velocity
dispersion, σ*, for QSOs in Data Release 3 of the Sloan Digital Sky Survey. We derive M BH …

We present new near-infrared spectroscopic measurements of the Hβ region for a sample of
29 luminous high-redshift quasars. We have measured the width of Hβ in those sources and …

We present detailed clustering measurements from the 2dF Quasi-Stellar Object Redshift
Survey (2QZ) in the redshift range 0.8< z< 2.1. Using a flux-limited sample of∼ 14 000 …