Institute for Advanced Study Astrophysics Seminar

I will explore the "Elusive Universe," where dark matter, neutrinos, and gravity sculpt our observed nature, leaving many open questions.
My work focuses on opening up new directions to answer these puzzles. I will present two approaches:
1) Using precision astrometry and space mission data to study general relativity, dark matter, cosmic neutrinos, and fifth forces [1, 2].
2) Utilizing quantum sensors mounted on spacecraft to study ultralight dark matter gravitationally bound to the sun, inspired by NASA Deep Space Atomic Clocks and Parker Solar Probe [3].
These approaches can also be applied to studying interstellar objects, primordial black holes, Planet Nine, and topological defects.
They are highly interdisciplinary efforts, highlighted by the DOE office of science, involving particle theorists and experts from NASA, ESA, and NIST.

[1] Tsai et al, https://arxiv.org/abs/2210.03749 (2023)
[2] Tsai et al, https://arxiv.org/abs/2107.04038, JCAP (2023), https://www.youtube.com/watch?v=xDX9XwLHBuM
[3] Tsai et al, Nature Astronomy volume 7, pages113–121 (2023), https://www.nature.com/articles/s41550-022-01833-6