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Explore 21cm intensity mapping techniques and cross-correlation science in this 39-minute conference talk delivered by Kavilan Moodley from the University of KwaZulu-Natal. Delve into the cutting-edge methods used to map the 21cm hydrogen line emission across cosmic scales and understand how these observations can be combined with other cosmological probes to advance our understanding of the universe's structure and evolution. Learn about the theoretical foundations of 21cm intensity mapping, its applications in studying large-scale structure formation, and the innovative cross-correlation techniques that enhance the scientific potential of these observations. Discover how 21cm surveys complement other multi-wavelength astronomical observations, from radio and microwave to optical and X-ray data, in the broader context of multi-probe cosmology. Gain insights into the challenges and opportunities in this rapidly evolving field, including the integration of 21cm data with cosmic microwave background measurements, galaxy surveys, and gravitational lensing studies to create a more comprehensive picture of cosmic evolution and dark matter distribution.
