Speaker
Description
After the dark ages of the Universe, the first generation of stars formed without any heavy elements. These metal-free stars, known as Population III (Pop III) stars, are thought to have influenced cosmic reionization, although the extent of their contribution remains uncertain. Therefore, understanding their properties is crucial for cosmology. However, direct observations remain challenging. One promising approach is to observe the neutral hydrogen 21cm line, which provides valuable information about the effects of Pop III stars on the surrounding neutral hydrogen. In our research, we forecast how precisely future observations of the 21cm global signal will constrain the typical mass and star formation efficiency of Pop III stars, using semi-numerical simulations.
