Journal article
Constraints on reionization from the z = 7.5 QSO ULASJ1342 0928
B Greig, A Mesinger, E Bañados
Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2019
DOI: 10.1093/mnras/stz230
Abstract
The recent detection of ULASJ1342+0928, a bright QSO at z = 7.54, provides a powerful probe of the ionization state of the intervening intergalactic medium, potentially allowing us to set strong constraints on the epoch of reionization (EoR). Here we quantify the presence of Ly α damping wing absorption from the EoR in the spectrum of ULASJ1342+0928. Our Bayesian framework simultaneously accounts for uncertainties on (i) the intrinsic QSO emission (reconstructing the Ly α profile from a covariance matrix of emission lines) and (ii) the distribution of H ii regions during reionization (from three different 1.6 3 Gpc 3 simulations spanning plausible EoR morphologies). Our analysis is complemen..
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Grants
Awarded by American Society for Radiation Oncology
Funding Acknowledgements
We thank the anonymous referee for their comments which have improved the discussions in this manuscript. We thank Fred Davies for comments on a draft version of this manuscript. Parts of this research were supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. AM acknowledges funding support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 638809 - AIDA - PI: AM).