Analysis of the Lyman-Alpha Forest and Reionization Based on THESAN

Abstract

As a matter of fact, the universe is composed of 70% invisible dark matter, and approximately 20% of dark energy. On this basis, it is crucial to consider how one can observe those compositions with our naked-eyes. In terms of prediction of the universe’s earliest birthing throes, the astrophysics simulation gives us a glimpse into prediction, which in turn makes valid comparison between simulated project and real-world situations. THESAN is currently the most advanced reionization simulation in the field. For high redshift universe, z=6, the reionization model reveals the intergalactic medium (IGM) is highly radioactive. We further compared the different models of equations governing the evolution of radiation through IGMs. The Lyman alpha forest visualizes the reionization evolution, hydrogen distribution, and other information of early universe. By using mathematical deduction and Python simulation, the mechanisms of the THESAN simulation are explained. Overall, these results shed light on guiding further exploration of reionization process.