Physics Colloquium: Anthony Pullen, Realistic inference models for line intensity mapping
Arts and Science
New York University, New York, NY
Realistic inference models for line intensity mappingY
Line intensity mapping (LIM), in which maps of the aggregate line emission from galaxies are produced over large volumes, has arisen as a promising probe of the physics of galaxies. However, the connection between galaxy properties and line emission is complex and expensive to predict over large scales using traditional hydrodynamic simulations, while most current LIM models are empirical and have limited interpretability. In this talk I will present improved LIM models using semi-analytic models (SAMs) of galaxy evolution. I will then discuss how EXCLAIM, a pathfinder LIM survey, can probe the cosmic star formation history given these models. Next, I will introduce a new framework we have developed to infer the global distribution of galaxy properties from line intensity maps and galaxy survey. Finally, I will present work on probing the origins of the universe through LIM.