Lunch talk on Nov. 17, 2025

Efficient Search and Multi-Dimensional Analysis of Fast Radio Bursts

Speaker: Yongkun Zhang (NAOC)

Venue: SWIFAR Building 2111

Time: 12:45 PM, Monday, Nov. 17, 2025

Abstract: 

Fast radio bursts (FRBs) are ultra-bright millisecond radio flashes from cosmological distances. Since their first discovery in 2007, they have become a frontier topic in astrophysics. This talk focuses on efficient FRB search methodologies and the characterization of their multi-faceted physical properties. Leveraging deep learning, we develop a tailored FRB search framework that achieves a tens-fold speed-up over traditional pipelines while substantially reducing the false-positive rate. Through case studies of repeating sources such as FRB 20201124A and FRB 20220912A, we reveal bimodal distributions in waiting times and burst energies, prominent circular polarization, and signatures of a dynamically evolving magnetized environment. These results provide physical support for an intrinsic polarization mechanism of the emission and are consistent with an origin in a magnetar magnetosphere.

Report PPT:  SWIFAR_Yongkun Zhang.pdf