中国天眼，新成果发布

Core Insights - The article discusses a significant breakthrough in astrophysics achieved by a research team led by the Purple Mountain Observatory, which captured the detailed evolution of the Faraday rotation measure (RM) of a repeating fast radio burst (FRB) for the first time internationally, providing strong observational evidence for the hypothesis that fast radio bursts originate from binary star systems [1][4]. Group 1: Fast Radio Bursts (FRBs) - Fast radio bursts are one of the most mysterious radio explosion phenomena in the universe, lasting only a few milliseconds but releasing energy equivalent to the total radiation of the Sun over a week [2][3]. - Since their first discovery in 2007, the origin mechanisms of fast radio bursts have remained a significant mystery in astrophysics, with speculation linking them to compact objects like neutron stars [2][3]. Group 2: Research Methodology - The research team utilized the high sensitivity of the Chinese Tianyan FAST to conduct over two years of continuous monitoring of the repeating fast radio burst FRB 20220529 [4]. - A crucial parameter monitored was the Faraday rotation measure, which reflects the density of plasma and magnetic field strength along the signal's propagation path, acting as a precise "cosmic magnetic environment probe" [4]. Group 3: Key Findings - The Faraday rotation measure of FRB 20220529 exhibited a dramatic increase, reaching 20 times its normal variation level, followed by a rapid decline back to normal within two weeks, marking a first in recorded fast radio burst research [4][5]. - The observed phenomenon is attributed to a dense magnetized plasma cloud from the vicinity of the fast radio burst source passing through the line of sight to Earth, similar to solar activity causing coronal mass ejections [5]. - Further analysis indicates that if FRB 20220529 originated from an isolated neutron star, existing theories could not explain the rapid magnetic environment changes; however, if it is part of a binary system, the intense activity from a companion star could naturally account for the observed fluctuations in the Faraday rotation measure [5].