Magnetic field reversal in the turbulent environment around a repeating fast radio burst

Reshma Anna-Thomas, Liam Connor, Shi Dai, Yi Feng, Sarah Burke-Spolaor, Paz Beniamini, Yuan Pei Yang, Yong Kun Zhang, Kshitij Aggarwal, Casey J. Law, Di Li, Chenhui Niu, Shami Chatterjee, Marilyn Cruces, Ran Duan, Miroslav D. Filipovic, George Hobbs, Ryan S. Lynch, Chenchen Miao, Jiarui NiuStella K. Ocker, Chao Wei Tsai, Pei Wang, Mengyao Xue, Ju Mei Yao, Wenfei Yu, Bing Zhang, Lei Zhang, Shiqiang Zhu, Weiwei Zhu

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים


Fast radio bursts (FRBs) are brief, intense flashes of radio waves from unidentified extragalactic sources. Polarized FRBs originate in highly magnetized environments. We report observations of the repeating FRB 20190520B spanning 17 months, which show that the FRB’s Faraday rotation is highly variable and twice changes sign. The FRB also depolarizes below radio frequencies of about 1 to 3 gigahertz. We interpret these properties as being due to changes in the parallel component of the magnetic field integrated along the line of sight, including reversing direction of the field. This could result from propagation through a turbulent magnetized screen of plasma, located 10–5 to 100 parsecs from the FRB source. This is consistent with the bursts passing through the stellar wind of a binary companion of the FRB source.

שפה מקוריתאנגלית
עמודים (מ-עד)599-603
מספר עמודים5
כתב עתScience
מספר גיליון6645
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 12 מאי 2023

הערה ביבליוגרפית

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© 2023 American Association for the Advancement of Science. All rights reserved.

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