Cafe Club, Yun-Ting Cheng: “Cosmology and Astrophysics from Intensity Mapping”.

Yun-Ting Cheng (Caltech): “Cosmology and Astrophysics from Intensity Mapping”.

You can find the schedule of upcoming café-clubs and the video of old ones here.

Take care,
Carlo, Mathilde, Meriam

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ABSTRACT

Intensity mapping has emerged as a promising tool to study the high redshift universe and the faint, diffuse extragalactic populations. Without resolving individual galaxies, IM uses the integrated light from all sources to statistically probe the emission properties of the sources and the underlying large-scale structure. In this talk, I will first give an overview on intensity mapping, followed by a few example science cases with intensity mapping including studying the extragalactic background light and the intra-halo light from the diffuse intensity maps. Next, I will introduce the upcoming NASA satellite mission — SPHEREx, which will conduct an all-sky near-infrared spectral survey. Finally, I will discuss the prospect of measuring the extragalactic background light with SPHEREx using cross correlation, and a novel data-driven technique to constrain the 3D large-scale structures from multi-frequency intensity maps.