Oral Presentation
Optimally Mapping Large-Scale Structures with Luminous Sources
Presenter: Yun-Ting Cheng (Caltech)
Intensity mapping has emerged as a promising tool to probe the three-dimensional structure of the Universe. The traditional galaxy surveys probe the large-scale structure based on individual galaxy detection, whereas intensity mapping uses the integrated emission from all sources in a 3D pixel (or voxel) to trace the underlying density field. In this work, We develop a formalism to quantify the performance of both approaches when measuring large-scale structures. We compute the Fisher information of an arbitrary observable, derive the optimal estimator, and use it to determine the best strategy for tracing large-scale density field for any given survey. In this talk, I will first give an overview of intensity mapping method, and then introduce the formalism and application of this technique.
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