Astro Seminar Series - VIA ZOOM

Wednesday, May 19, 2021 11:30 am - 11:30 am EDT (GMT -04:00)

Yi-Kuan Chiang
Yi-Kuan Chiang is a CCAPP fellow at the Ohio State University working on data-intensive astronomy. He extracts cosmological and astrophysical information in the diffuse extragalactic background light in sky surveys across the electromagnetic spectrum. He received his PhD from the University of Texas at Austin and has held post-doctoral positions at Johns Hopkins University and the University of Tokyo.

Talk Title and Abstract:

Probing the Cosmic Energy Density Inventory with Tomographic Intensity Mapping

The formation of stars, galaxies, and the large-scale structure in the Universe drives complex energy density flows over a wide range of scales from atomic nuclei to the Hubble length. The net effect could be summarized by a census of the density parameters, Ω, for different entries of the cosmic inventory over time. I will talk about my ongoing effort to probe the history of some key cosmic constituents, including stars, dust, thermal and gravitational energy associated with the large-scale structure. These are constrained via intensity mapping of the cosmic UV, IR, and the Sunyaev-Zeldovich effect backgrounds tomographically as functions of redshift via a new clustering-based technique. While these measurements are already pushing our understanding of the Universe, they represent only the beginning of a new chapter of observational cosmology using the entire radiation field as opposed to only detectable bright galaxies. I will conclude by sharing my excitement on the future prospects of extragalactic background intensity mapping.

Would you like to join this Zoom seminar?  Please email Donna Hayes.