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A disc wind model for blueshifts in quasar broad emission lines
James H. Matthews, Jago Strong-Wright, Christian Knigge +7
Blueshifts - or, more accurately, blue asymmetries - in broad emission lines such as CIV 1550 are common in luminous quasars and correlate with fundamental properties such as Ed…
No redshift evolution in the rest-frame UV emission line properties of quasars from z=1.5 to z=4.0
Matthew Stepney, Manda Banerji, Paul C. Hewett +4
We analyse the rest-frame UV spectra of 2,531 high-redshift (3.5<z<4.0) quasars from the Sloan Digital Sky Survey DR16Q catalogue. In combination with previous work, we study the r…
Multiwavelength observations of the extraordinary accretion event AT2021lwx
P. Wiseman, Y. Wang, S. Hönig +43
We present observations from X-ray to mid-infrared wavelengths of the most energetic non-quasar transient ever observed, AT2021lwx. Our data show a single optical brightening by a…
Testing AGN outflow and accretion models with CIV and HeII emission line demographics in z=2 quasars
Matthew J. Temple, James H. Matthews, Paul C. Hewett +6
Using 190,000 spectra from the seventeenth data release of the Sloan Digital Sky Survey, we investigate the ultraviolet emission line properties in z=2 quasars. Specifically, we qu…