Journal article
Inferring astrophysical parameters using the 2D cylindrical power spectrum from reionization
B Greig, D Prelogović, Y Qin, YS Ting, A Mesinger
Monthly Notices of the Royal Astronomical Society | OXFORD UNIV PRESS | Published : 2024
Abstract
Enlightening our understanding of the first galaxies responsible for driving reionization requires detecting the 21-cm signal from neutral hydrogen. Interpreting the wealth of information embedded in this signal requires Bayesian inference. Parameter inference from the 21-cm signal is primarily restricted to the spherically averaged power spectrum (1D PS) owing to its relatively straightforward derivation of an analytic likelihood function enabling traditional Monte Carlo Markov Chain approaches. However, in recent years, simulation-based inference (SBI) has become feasible which removes the necessity of having an analytic likelihood, enabling more complex summary statistics of the 21-cm sig..
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Grants
Awarded by Swinburne University of Technology
Funding Acknowledgements
We would like to thank the anonymous referees whose comments improved 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. YST acknowledges financial support from the Australian Research Council through DECRA Fellowship DE220101520. AM acknowledges support from the Ministry of Universities and Research (MUR) through the PRIN project'Optimal inference from radio images of the epoch of reionization' as well as the PNRR project'Centro Nazionale di Ricerca in High Performance Computing, Big Data e Quantum Computing'. This work was performed on the OzSTAR national facility at Swinburne University of Technology. The OzSTAR program receives funding in part from the Astronomy National Collaborative Research Infrastructure Strategy (NCRIS) allocation provided by the Australian Government, and from the Victorian Higher Education State Investment Fund (VHESIF) provided by the Victorian Government.