hyprfine: simulating the 21-cm signal from the Dark Ages through to the Epoch of Reionization on a GPU

Harry T. J. Bevins

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arXiv · 2610.01865

hyprfine: simulating the 21-cm signal from the Dark Ages through to the Epoch of Reionization on a GPU

Harry T. J. Bevins

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Abstract

hyprfine is an analytic simulation of the sky-averaged 21-cm signal from $z=1100 - 6$ written using JAX and Python for native GPU capabilities. It models the average temperature of the 21-cm signal over cosmic time as a function of the $Λ$-CDM cosmology parameters and the astrophysics of the first stars and galaxies. As far as we are aware, the code is the first analytic GPU native simulation of the 21-cm signal. It runs in a fraction of a second, parallelises efficiently across a GPU and is differentiable through the Dark Ages ($z \geq 35$).

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BibTeX RIS

Harry T. J. Bevins. 2026-10-01. hyprfine: simulating the 21-cm signal from the Dark Ages through to the Epoch of Reionization on a GPU. https://arxiv.org/abs/2610.01865

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