Core Insights - A research team led by the Purple Mountain Observatory of the Chinese Academy of Sciences has captured the detailed evolution of the Faraday rotation measure (RM) of a repeating fast radio burst (FRB), providing key observational evidence for the hypothesis that FRBs originate from binary star systems [1][3] Group 1: Research Findings - The team monitored the repeating fast radio burst FRB 20220529 for over two years, concluding that it likely originates from a binary star system [3] - The observed Faraday rotation measure increased by 20 times and then rapidly decreased, indicating the passage of a dense magnetized plasma cloud through the line of sight, consistent with the activity of a companion star in a binary system [3] Group 2: Technological Advancements - The Five-hundred-meter Aperture Spherical Telescope (FAST) is the world's largest single-dish radio telescope, contributing to various fields such as gravitational wave detection and pulsar searches since its operation [5] - FAST is set to undergo upgrades, including the construction of several medium-sized antennas to form a giant aperture array, enhancing observational sensitivity and addressing the limitations of single-dish telescopes [5]

Core Insights - The research team utilizing the "China Sky Eye" has made a significant breakthrough in understanding the origin of fast radio bursts (FRBs), specifically revealing that they originate from binary star systems, providing crucial evidence for understanding extreme cosmic phenomena [2][3] Group 1: Research Findings - The discovery was published in the international academic journal "Science" on January 16, 2026, and is a result of collaboration among multiple research institutions led by the Purple Mountain Observatory of the Chinese Academy of Sciences [2] - Fast radio bursts are one of the most mysterious phenomena in the universe, lasting only milliseconds but releasing energy equivalent to the total radiation of the Sun over a week [2] - The research team conducted over two years of continuous monitoring of the repeating fast radio burst FRB 20220529 using the "China Sky Eye," the world's largest single-dish radio telescope [2] Group 2: Observational Breakthroughs - The "China Sky Eye" demonstrated unparalleled sensitivity, allowing it to detect weak signals that other telescopes could not, which was crucial for observing FRB 20220529 [3] - During the observations, the Faraday rotation measure of FRB 20220529 suddenly surged to 1977±84 radians/m², approximately 20 times the previous fluctuation range, before quickly declining back to normal levels [3] - This unique observation process provides a new window for exploring the depths of the universe and offers key evidence for understanding extreme cosmic explosion phenomena [3] Group 3: Contributions to Astronomy - Since its inception, the "China Sky Eye" has produced groundbreaking results in various fields, including gravitational wave detection, pulsar searches, fast radio burst research, and neutral hydrogen observations, contributing to humanity's exploration of the unknown universe [3]

Core Insights - The "China Sky Eye" (FAST) has made a significant breakthrough by capturing the detailed evolution of the Faraday rotation of a repeating fast radio burst (FRB), providing crucial observational evidence for the hypothesis that fast radio bursts originate from binary star systems [1][4][7]. Group 1: Research Findings - The research team, led by the Purple Mountain Observatory of the Chinese Academy of Sciences, published their findings in the journal "Science" on January 16, 2023, and held a press conference to explain the results [3]. - The Faraday rotation of FRB 20220529 was monitored for over two years, revealing a sudden spike to 1977±84 radians/m², approximately 20 times the previous fluctuation range, followed by a rapid decline back to normal levels [6][8]. - This unprecedented observation of rapid and reversible magnetic environment changes marks a first in the history of fast radio burst research [6]. Group 2: Implications for Astrophysics - The core physical mechanism behind the observed Faraday rotation change is attributed to a dense magnetized plasma cloud from the fast radio burst's source, which passed through the line of sight between Earth and the burst [7]. - The findings suggest that if FRB 20220529 originated from a solitary neutron star, existing theories cannot explain such a drastic and rapid magnetic environment change. However, if it is part of a binary system, the intense activity from a companion star could naturally produce the observed Faraday rotation event [7]. - This discovery provides strong observational support for the binary star origin model of fast radio bursts, enhancing the understanding of their mechanisms [7].

Core Insights - A research team led by the Purple Mountain Observatory has made a significant breakthrough by capturing 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 FRBs originate from binary star systems [1][4]. Group 1: Discovery and Research Methodology - The research utilized China's 500-meter aperture spherical radio telescope, FAST, to monitor the repeating FRB 20220529 for over two years, leveraging its high sensitivity to detect subtle changes in the Faraday rotation measure [1][3]. - The Faraday rotation measure is a crucial parameter that reflects the density of plasma and magnetic field strength along the signal's propagation path, acting as a precise "cosmic magnetic environment probe" [3][4]. Group 2: Observational Findings - The Faraday rotation measure of FRB 20220529 exhibited small fluctuations within a certain range for 18 months, until December 2023, when it experienced a dramatic surge to 20 times its normal variation level, followed by a rapid decline back to normal [4][5]. - This phenomenon is unprecedented in the recorded history of FRB research, indicating a significant event in the cosmic environment [4]. Group 3: Theoretical Implications - The observed rapid and large-scale changes in the magnetic environment cannot be explained by existing theories if FRB 20220529 were to originate from an isolated neutron star; however, if it is part of a binary star system, the intense activity from a companion star could naturally explain the observed fluctuations in the Faraday rotation measure [5].

央广网北京1月16日消息（记者朱敏 王家伟）据中央广播电视总台中国之声报道，近日，由中国科学院紫金山天⽂台牵头，联合国内外多家研究机构组 成的研究团队，利用我国500米口径球面射电望远镜（"中国天眼"，FAST）取得重要突破——在国际上首次捕捉到重复快速射电暴（FRB）的法拉第旋转量 （RM）发生剧烈跃变并随后回落的详细演化过程。这一独特发现结果为"快速射电暴起源于双星系统"的假说提供了直接且关键的观测证据，相关研究成果 已于北京时间2026年1月16日在线发表在国际学术期刊《科学》（Science）。 播放 （视频来源：中国科学院紫金山天⽂台和国家天⽂台） 快速射电暴是宇宙中最神秘的射电爆发现象之一，其持续时间仅为数毫秒，却能在瞬间释放相当于太阳一整周辐射总和的巨⼤能量。自2007年被首次发 现以来，这类"宇宙射电脉冲闪"的起源机制一直是天体物理学领域的重要谜团。科学界普遍推测其与中子星等致密天体有关，而部分重复爆发的快速射电暴 所呈现的爆发周期性特征，更暗示其起源天体可能处于双星系统中，但长期缺乏直接观测证据支撑这一猜想。 播放 为破解这一谜题，研究团队利用FAST的超高灵敏度优势，对重复快速射电暴FRB ...