3:30–5:00 pm ERC 161
Title: Searching for Cosmic Dawn and Beyond with Radio Observations from the Arctic
Abstract: Observations of redshifted 21-cm emission of neutral hydrogen are a rapidly growing area of cosmology research. Measurements of the radio sky at ~200 MHz and below are a promising tool for exploring cosmic dawn, and at frequencies below tens of MHz, future observations may allow us to one day probe the dark ages. However, observations at these low frequencies are challenging because of Galactic foreground contamination, ionospheric effects, radio-frequency interference, and instrumental systematics. I will discuss the MIST global 21-cm experiment and ALBATROS, an array of autonomous antenna stations that aims to image the low-frequency sky. With the combination of instrumentation advances and a uniquely radio-quiet observing site in the Canadian high Arctic, these experiments aim to open observational windows into the early history of our universe.
Zoom: https://uchicago.zoom.us/j/95272936732?pwd=HXVM29KzFU5yU8WvLcXKsxa9HlSTLE.1
