VIRTUAL MEETING ONLY: CPC Seminar: Asteroids as new fifth force and ultra-light dark sector tests

  • Sept. 20, 2021, 2:00 pm US/Central

Speaker: Youjia Wu, University of Michigan

Abstract: Radar and optical observations can provide precise measurements of the positions and velocities of asteroids. These high-precision motion data of asteroids are a great probe of fifth force with a range of solar-system size. In this talk, I will introduce how the long-range fifth force can induce precession of asteroids, and our sensitivity reaches with analysis on 9 Near-Earth Objects (NEOs). Our sensitivity reach from asteroids is comparable to those from leading torsion balance experiments in some mediator mass regions. In the future, with precise measurements of more asteroids from future facilities like Goldstone Radar and Rubin Observatory, our method can produce stronger sensitivity reaches.
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For more information, please contact Yu-Dai Tsai at