Unveiling Reionization History with Higher-Order 21cm Signal Statistics

On November 17, 2025, a novel method for inferring the history of cosmic reionization with enhanced precision was submitted to arXiv in the field of astrophysics. Researchers, led by Nicolas Cerardi, propose that by utilizing higher-order statistics of the 21-cm signal, it may be possible to elucidate details of the reionization process that were previously challenging to discern with traditional statistical methods. This approach aims to reconstruct the ionization state of neutral hydrogen in the early universe from observational data, potentially offering significant advancements in understanding the universe’s evolution, particularly the physical conditions during the formation of the first stars and galaxies. The paper is being prepared for submission to MNRAS, with further validation against observational data and theoretical development anticipated.

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