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Fast Radio Bursts (FRBs) are millisecond-duration cosmological transients with unclear origins. Understanding their origins requires not only identifying their emission mechanism, but also characterizing the environments in which they reside. Taking advantage of the high sensitivity of the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we conducted long-term monitoring of the repeating source FRB 20220529 over three years. In this talk, I will present the magneto-ionic environment evolution of FRB 20220529, revealed by the Faraday rotation measure (RM). The observed RM flare and secular evolution on yearly timescales provide important clues to the physical conditions surrounding the source. We discuss the possibility that these features can be explained within a binary system scenario, and compare this interpretation with alternative models for the progenitor and its environment.

BIO

Ye Li is currently an Associate Researcher at the Purple Mountain Observatory, Chinese Academy of Sciences. She received her Ph.D. from the University of Nevada, Las Vegas in 2017 and subsequently conducted postdoctoral research at the Kavli Institute for Astronomy and Astrophysics at Peking University. Her research focuses on stellar transients, including fast radio bursts (FRBs) and gamma-ray bursts (GRBs), with the goal of understanding their physical origins and the environments in which they arise.

Host: Junjie Mao