Mondays, Virtual (link on request)
Welcome! The next tea talk is listed here. Please check the Talk Schedule page for all the talks lined-up for 2020-2021 session. Please note we would be switching between the 10 am and 4 pm time slots on Mondays to accommodate speakers from different time zones.
We are currently completely booked for the 2020-2021 academic year. If you are interested in giving a Tea Talk (especially graduate students and postdocs), please reach out to us via the form accessible under "contact us" and we will place you on a list of potential speakers for the next academic year.
Probing the Cosmic Inventory by Unlocking the Diffuse Light in Sky Surveys
Yi-Kuan Chiang(CCAPP, Ohio State University)
Mar 8, 2021
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 in the cosmic inventory over time. I will present my ongoing effort to probe the history of several key cosmic constituents, including stars, dust, thermal, and gravitational energy associated with the large-scale structure. To do so, we deproject the cosmic UV, IR, and the Sunyaev-Zeldovich effect backgrounds over redshift using a new tomographic intensity mapping approach. While the results are already pushing our understanding of the Universe, they represent only the beginning of a new chapter of cosmology and astrophysics using the entire radiation field as opposed to only bright, individually detectable galaxies. Looking forward, I will describe the infrastructure that we are building and highlight some exciting science opportunities in the next decade.