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Feeding compact bulges and supermassive black holes with low angular-momentum cosmic gas at high redshift
Yohan Dubois, Christophe Pichon, Martin Haehnelt +4
We use cosmological hydrodynamical simulations to show that a significant fraction of the gas in high redshift rare massive halos falls nearly radially to their very centre on extr…
Improved measurements of the intergalactic medium temperature around quasars: possible evidence for the initial stages of He-II reionisation at z~6
James S. Bolton, George D. Becker, Sudhir Raskutti +3
We present measurements of the intergalactic medium (IGM) temperature within ~5 proper Mpc of seven luminous quasars at z~6. The constraints are obtained from the Doppler widths of…
Massive Neutrinos and the Non-linear Matter Power Spectrum
Simeon Bird, Matteo Viel, Martin G. Haehnelt
We perform an extensive suite of N-body simulations of the matter power spectrum, incorporating massive neutrinos in the range M = 0.15-0.6 eV, probing the non-linear regime at sca…
How neutral is the intergalactic medium surrounding the redshift z=7.085 quasar ULAS J1120+0641?
James S. Bolton, Martin G. Haehnelt, Stephen J. Warren +5
The quasar ULAS J1120+0641 at redshift z=7.085 has a highly ionised near zone which is smaller than those around quasars of similar luminosity at z~6. The spectrum also exhibits ev…
Filamentary Infall of Cold Gas and Escape of Lyman Alpha and Hydrogen Ionizing Radiation from an Interacting High-Redshift Galaxy
Michael Rauch, George D. Becker, Martin G. Haehnelt +3
We present observations of a peculiar Lyman alpha-emitting galaxy at redshift 3.344, discovered in a deep, blind spectroscopic survey for faint Lyman alpha emitters with the Magell…
Galactic Winds and Extended Lya Emission from the Host Galaxies of High Column Density QSO Absorption Systems
Luke A. Barnes, Martin G. Haehnelt, Edoardo Tescari +1
We present 3D resonant radiative transfer simulations of the spatial and spectral diffusion of the Lya radiation from a central source in the host galaxies of high column density a…