Journal article
Fisher matrix forecasts on the astrophysics of galaxies during the epoch of reionization from the 21-cm power spectra
S Balu, B Greig, JSB Wyithe
Monthly Notices of the Royal Astronomical Society | Published : 2023
Abstract
The hyperfine 21-cm transition of neutral hydrogen from the early Universe (z > 5) is a sensitive probe of the formation and evolution of the first luminous sources. Using the Fisher matrix formalism we explore the complex and degenerate high-dimensional parameter space associated with the high-z sources of this era and forecast quantitative constraints from a future 21-cm power spectrum (21-cm PS) detection. This is achieved using, a coupled semi-analytic galaxy formation model and reionization simulation, applied to an N-body halo merger tree with a statistically complete population of all atomically cooled galaxies out to z ∼20. Our mock observation assumes a 21-cm detection spanning z [5..
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Grants
Awarded by Australian Government
Funding Acknowledgements
We thank the referee for their detailed comments which improved the quality of this manuscript. SB thanks Yuxiang Qin for the helpful discussions which assisted this work. This research was supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project #CE170100013. Part of this work was performed on the OzSTAR national facility at the Swinburne University of Technology. The OzSTAR program partially receives funding from the Astronomy National Collaborative Research Infrastructure Strategy (NCRIS) allocation provided by the Australian Government. This research also made use of resources from the National Computational Infrastructure (NCI Australia), another NCRIS-enabled capability supported by the Australian Government.