Speaker
Yuxiang Qin
Description
The redshifted 21cm signal from the Cosmic Dawn is expected to provide unprecedented insights into early Universe astrophysics and cosmology. In this talk, I will explore how dark matter can heat the intergalactic medium before the first galaxies, leaving a distinctive imprint in the 21cm power spectrum. Using a dedicated Fisher matrix forecast on the sensitivity of the Hydrogen Epoch of Reionization Array (HERA) telescope to dark matter decays, I will show that HERA has the potential to improve current cosmological constraints on the dark matter decay lifetime by up to three orders of magnitude.
