NPA Zoom Seminar, Zhilei Xu, MIT, “Precision Cosmology: from the CMB to 21-cm Observations”

Over the past decades, the discovery and characterization of the cosmic microwave background (CMB) have marked the beginning of precision cosmology. At lower redshifts, future 21-cm signals from neutral hydrogen atoms also have great potential for cosmological and astrophysical studies. Observing 21-cm signals at different frequency bands produces a tomographic view of the universe. These observations will transform our current understanding of cosmology, commencing the 21-cm precision cosmology. In this talk, I will review the previous CMB observations and how it established the ΛCDM cosmology model, primarily from satellite missions. Then I will discuss recent and future advancements from ground-based CMB experiments. In the end, I will discuss how 21-cm observations can become powerful probes to study the cosmic reionization and eventually directly observe signals from the cosmic Dark Ages.
Zoom Info: https://yale.zoom.us/j/93903961284?pwd=empxRWhzdkY5SXpuQ2U2NmR1aWlpZz09