Journal article

The impact of temperature fluctuations on the large-scale clustering of the Ly alpha forest

Bradley Greig, James S Bolton, J Stuart B Wyithe

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2015

Abstract

We develop a semi-analytic method for assessing the impact of the large-scale IGM temperature fluctuations expected following He II reionization on three-dimensional clustering measurements of the Lyα forest. Our methodology builds upon the existing large volume, mock Lyα forest survey simulations presented by Greig et al. by including a prescription for a spatially inhomogeneous ionizing background, temperature fluctuations induced by patchy He II photoheating and the clustering of quasars. This approach enables us to achieve a dynamic range within our semi-analytic model substantially larger than currently feasible with computationally expensive, fully numerical simulations. The results ag..

View full abstract

Grants


Awarded by Science and Technology Facilities Council


Funding Acknowledgements

We thank Andrew Pontzen, Satya Gontcho A Gontcho and K.G. Lee for providing helpful comments on a draft version of this manuscript. We also thank the anonymous referee for providing helpful suggestions. BG acknowledges the support of the Australian Postgraduate Award. The Centre for All-sky Astrophysics is an Australian Research Council Centre of Excellence, funded by grant CE110001020. JSB acknowledges the support of a Royal Society University Research Fellowship.