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Explore the intersection of cosmology and observational astronomy through this 57-minute lecture examining how the Lyman-alpha forest serves as a powerful probe for understanding the universe's structure and evolution. Delve into the theoretical foundations of Lyman-alpha absorption systems, their formation mechanisms, and their distribution along quasar sightlines. Learn how these intergalactic medium features provide crucial insights into dark matter properties, neutrino masses, and the thermal history of the universe. Discover the statistical methods used to analyze Lyman-alpha forest data, including power spectrum measurements and their cosmological implications. Examine current observational campaigns and surveys that utilize this technique, along with the challenges and systematic effects that must be addressed in data analysis. Understand how Lyman-alpha forest observations complement other cosmological probes and contribute to our understanding of fundamental physics, including constraints on warm dark matter models and primordial non-Gaussianity.
