The research team led by Prof. Li Di from NAOC newly detected, based on precise observations of the FAST, circular polarization in two active repeating fast radio bursts, increasing the number of repeating FRBs with circular polarization from 1 to 3, suggesting that circular polarization could be a common trait of repeating FRBs.

Some filament eruptions are triggered by reconnection between the filament and emerging flux. The details of such a reconnection are, however, rarely presented. Researchers from NAOC study the detailed reconnection, which led to the reconfiguration and subsequent partial eruption of the filament, and propose that besides the orientation of the emerging fields, the position, distance, strength, and area are also crucial for triggering the filament eruption.