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A Systematic Survey for z < 0.04 Changing-Look AGNs
Madhooshi R. Senarath, Michael J. I. Brown, Michelle E. Cluver +6
We have conducted a systematic survey for z 0.04 active Galactic nuclei (AGNs) that may have changed spectral class over the past decade. We use SkyMapper, Pan-STARRS and the V…
Quasars at intermediate redshift are not special; but they are often satellites
Shadab Alam, Nicholas P. Ross, Sarah Eftekharzadeh +4
Understanding the links between the activity of supermassive black holes (SMBH) at the centres of galaxies and their host dark matter haloes is a key question in modern astrophysic…
The Bolometric Quasar Luminosity Function at z = 0-7
Xuejian Shen, Philip F. Hopkins, Claude-André Faucher-Giguère +4
In this paper, we provide updated constraints on the bolometric quasar luminosity function (QLF) from to . The constraints are based on an observational compilation that…
Through Andromeda and Beyond: AGN Optical Transient 'Sharov21' Revisited
A. Bruce, A. Lawrence, D. McLeod +1
We revisit a notable AGN known as `Sharov21', seen to undergo a dramatic outburst in 1992, brightening by a factor of thirty over a period of approximately one year. A simple micro…
The first high-redshift changing-look quasars
Nicholas P. Ross, Matthew J. Graham, Giorgio Calderone +3
We report on three redshift quasars with dramatic changes in their C IV emission lines, the first sample of changing-look quasars (CLQs) at high redshift. This is also the fi…
Behaviour of the MgII 2798AA Line Over the Full Range of AGN Variability
David Homan, Chelsea L. Macleod, Andy Lawrence +2
We investigate the responsiveness of the 2798AA Mg II broad emission line in AGN on timescales of several years. Our study is based on a sample of extremely variable AGN as well as…