Speaker
Description
In this work, we incorporate the stochastic nature of X-ray sources into the 21-cm signal simulations of Cosmic Dawn. Traditionally, simulations of the 21-cm line have assumed a constant or smoothly varying X-ray background. This simplicity, however, ignores the intrinsically stochastic distribution of X-ray sources, including X-ray binaries, which are believed to have a major impact on the Intergalactic medium (IGM) temperature and ionization history. We intend to capture the intricate relationship between X-ray luminosity, source distribution, and the heating of the IGM by incorporating a stochastic model for X-ray source distribution into current 21-cm simulations. According to preliminary findings, the predicted 21-cm signal exhibits alterations when X-ray stochasticity is introduced, particularly with regard to a more complicated and heterogeneous thermal history and ionization than previously thought. It holds the potential for novel observational signatures that could be targeted by upcoming low-frequency radio telescopes such as the Square Kilometre Array (SKA).
