f Astronomy Tea Talk at Caltech

Astronomy Tea Talk at Caltech

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.

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