240 citations · 448 across the 11 of their papers we have counts for
5 papers · 1 filter
Constraining the Quasar Contribution to the Reionisation of Cosmic Hydrogen
Jhan Srbinovsky, Stuart Wyithe
Absorption spectra of high redshift quasars suggest that the reionisation of cosmic hydrogen was complete near z~6. The dominant sources of ionising photons responsible for this re…
Smooth Boundaries to Cosmological HII Regions from Galaxy Clustering
Stuart Wyithe, Abraham Loeb
The HII regions around quasars and galaxies at redshifts beyond the epoch of reionisation will provide prime targets for upcoming 21cm campaigns using a new generation of low-frequ…
Lyman Alpha Constraints on Very Low Luminosity AGN
Mark Dijkstra, Stuart Wyithe
Recent surveys have detected Lya emission from z=4.5-6.5 at luminosities as low as 10^41 erg/s. There is good evidence that low numbers of AGN are among observed faint Lya emitters…
The shallow slope of the z~6 quasar luminosity function: limits from the lack of multiple image gravitational lenses
Stuart Wyithe
We place a limit on the logarithmic slope of the luminous quasar luminosity function at z~6 of beta>-3.0 (90%) using gravitational lensing constraints to build on the limit of beta…
Determination of the transverse velocity of Q2237+0305
J. S. B. Wyithe
The largest systematic uncertainty present in the analysis of gravitationally microlensed quasar light curves is that of the galactic transverse velocity. We describe a method for…