Title: Unveiling the Connection between Fast Radio Bursts and Magnetars
Speaker: Chin-Ping Hu (NCUE)
Date: September 20 at 14:30
Location: R521, General Building II
Abstract:
Fast Radio Bursts (FRBs) remain one of the most enigmatic astrophysical phenomena of this decade, with their origins still largely unknown despite numerous theoretical models being proposed. Magnetars, neutron stars with extremely high magnetic fields and diverse X-ray emissions, stand out as promising sources of part of FRBs. In this talk, I will focus on observational evidence linking FRBs to magnetars, particularly through our recent observations of the FRB-emitting magnetar SGR 1935+2154. Thanks to high-cadence observations carried out by the NICER and NuSTAR, we observed two spin-up glitches within nine hours during an outburst associated with an intermediate flare, a forest of X-ray bursts, rapid spectral changes, and an FRB. These phenomena suggest that rapid changes in rotational frequency may trigger multi-wavelength energetic events, and rapid spectral change could result in alterations in the magnetospheric environment that enable radio emissions. These findings provide valuable insights and help shape future observational strategies.
