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

Autor: Anna-Thomas R; Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA.; Center for Gravitational Waves and Cosmology, West Virginia University, Morgantown, WV 26506, USA., Connor L; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA.; Owens Valley Radio Observatory, California Institute of Technology, Big Pine, CA 93513, USA., Dai S; School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China.; Australia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation-Space and Astronomy, Epping, NSW 1710, Australia., Feng Y; Zhejiang Lab, Hangzhou, Zhejiang 311121, China., Burke-Spolaor S; Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA.; Center for Gravitational Waves and Cosmology, West Virginia University, Morgantown, WV 26506, USA., Beniamini P; Department of Natural Sciences, Open University of Israel, Ra'anana 43107, Israel.; Astrophysics Research Center of the Open University, The Open University of Israel, Ra'anana 43537, Israel., Yang YP; South-Western Institute for Astronomy Research, Yunnan University, Kunming 650500, Yunnan, China., Zhang YK; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China., Aggarwal K; Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA.; Center for Gravitational Waves and Cosmology, West Virginia University, Morgantown, WV 26506, USA., Law CJ; Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA.; Owens Valley Radio Observatory, California Institute of Technology, Big Pine, CA 93513, USA., Li D; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China.; Zhejiang Lab, Hangzhou, Zhejiang 311121, China.; University of Chinese Academy of Sciences, Beijing 100049, China.; National Astronomical Observatories, Chinese Academy of Sciences-University of KwaZulu-Natal Computational Astrophysics Centre, University of KwaZulu-Natal, Durban 4000, South Africa., Niu C; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China., Chatterjee S; Department of Astronomy, Cornell University, Ithaca, NY 14853, USA.; Cornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, NY 14853, USA., Cruces M; Max-Planck Institute for Radio Astronomy, D-53121 Bonn, Germany., Duan R; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China., Filipovic MD; School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia., Hobbs G; Australia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation-Space and Astronomy, Epping, NSW 1710, Australia., Lynch RS; Green Bank Observatory, Green Bank, WV 24401, USA., Miao C; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China., Niu J; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China., Ocker SK; Department of Astronomy, Cornell University, Ithaca, NY 14853, USA.; Cornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, NY 14853, USA., Tsai CW; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China.; University of Chinese Academy of Sciences, Beijing 100049, China.; Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, China., Wang P; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China., Xue M; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China., Yao JM; Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China., Yu W; Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China., Zhang B; Nevada Center for Astrophysics, Las Vegas, NV 89154, USA.; Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154, USA., Zhang L; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China., Zhu S; Zhejiang Lab, Hangzhou, Zhejiang 311121, China., Zhu W; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China.; Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, China.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2023 May 12; Vol. 380 (6645), pp. 599-603. Date of Electronic Publication: 2023 May 11.
DOI: 10.1126/science.abo6526
Abstrakt: 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 [Formula: see text] parsecs from the FRB source. This is consistent with the bursts passing through the stellar wind of a binary companion of the FRB source.
Databáze: MEDLINE
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