Dark-ages reionization and galaxy formation simulation - XVI. The thermal memory of reionization
James E Davies, Simon J Mutch, Yuxiang Qin, Andrei Mesinger, Gregory B Poole, J Stuart B Wyithe
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2019
Intergalactic medium temperature is a powerful probe of the epoch of reionization, as information is retained long after reionization itself. However, mean temperatures are highly degenerate with the timing of reionization, with the amount heat injected during the epoch, and with the subsequent cooling rates. We post-process a suite of semi-analytic galaxy formation models to characterize how different thermal statistics of the intergalactic medium can be used to constrain reionization. Temperature is highly correlated with redshift of reionization for a period of time after the gas is heated. However as the gas cools, thermal memory of reionization is lost, and a power-law temperature-densi..View full abstract
Awarded by Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (AS-TRO 3D)
JD would like to thank James Bolton for helpful comments on the draft version of this paper. JD is supported by the University of Melbourne under the Melbourne Research Scholarship (MRS). This research was also supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (AS-TRO 3D), through project number CE170100013. This work was performed on the OzSTAR national facility at Swinburne University of Technology. OzSTAR is funded by Swinburne University of Technology and the National Collaborative Research Infrastructure Strategy (NCRIS). Parts of this work were performed on the gSTAR national facility at Swinburne University of Technology. gSTAR is funded by Swinburne and the Australian Government's Education Investment Fund. Parameter constraints plots were generated using the CORNER PYTHON package (Foreman-Mackey 2016).