The Astrophysical Journal (Jan 2024)
An Extremely Active Repeating Fast Radio Burst Source in a Likely Nonmagneto-ionic Environment
- Yi Feng,
- Di Li,
- Yong-Kun Zhang,
- Chao-Wei Tsai,
- Yuanhong Qu,
- Wei-Yang Wang,
- Yuan-Pei Yang,
- Pei Wang,
- Dengke Zhou,
- Jiarui Niu,
- Chenchen Miao,
- Mao Yuan,
- Jiaying Xu,
- Ryan S. Lynch,
- William Paul Armentrout,
- Brenne Gregory,
- Lingqi Meng,
- Shen Wang,
- Xianglei Chen,
- Shi Dai,
- Chen-Hui Niu,
- Mengyao Xue,
- Ju-Mei Yao,
- Bing Zhang,
- Junshuo Zhang,
- Weiwei Zhu,
- Jintao Xie,
- Yuhao Zhu
Affiliations
- Yi Feng
- Research Center for Astronomical Computing, Zhejiang Laboratory , Hangzhou 311100, People's Republic of China ; [email protected], [email protected]; Institute for Astronomy, School of Physics, Zhejiang University , Hangzhou 310027, People's Republic of China
- Di Li
- ORCiD
- Research Center for Astronomical Computing, Zhejiang Laboratory , Hangzhou 311100, People's Republic of China ; [email protected], [email protected]; Department of Astronomy, Tsinghua University , Beijing 100084, People's Republic of China; National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]
- Yong-Kun Zhang
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]; University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China
- Chao-Wei Tsai
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]; University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China; Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University , Beijing 102206, People's Republic of China
- Yuanhong Qu
- ORCiD
- Nevada Center for Astrophysics, University of Nevada , Las Vegas, NV 89154, USA; Department of Physics and Astronomy, University of Nevada , Las Vegas, NV 89154, USA
- Wei-Yang Wang
- ORCiD
- University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China; Department of Astronomy, Peking University , Beijing 100871, People's Republic of China; Kavli Institute for Astronomy and Astrophysics, Peking University , Beijing 100871, People's Republic of China
- Yuan-Pei Yang
- ORCiD
- South-Western Institute for Astronomy Research, Yunnan University , Kunming 650504, People's Republic of China; Purple Mountain Observatory, Chinese Academy of Sciences , Nanjing 210023, People's Republic of China
- Pei Wang
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]; Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University , Beijing 102206, People's Republic of China
- Dengke Zhou
- Research Center for Astronomical Computing, Zhejiang Laboratory , Hangzhou 311100, People's Republic of China ; [email protected], [email protected]
- Jiarui Niu
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]
- Chenchen Miao
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]
- Mao Yuan
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]
- Jiaying Xu
- Research Center for Astronomical Computing, Zhejiang Laboratory , Hangzhou 311100, People's Republic of China ; [email protected], [email protected]
- Ryan S. Lynch
- ORCiD
- Green Bank Observatory , Green Bank, WV 24944, USA
- William Paul Armentrout
- ORCiD
- Green Bank Observatory , Green Bank, WV 24944, USA
- Brenne Gregory
- Green Bank Observatory , Green Bank, WV 24944, USA
- Lingqi Meng
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]
- Shen Wang
- School of Computer Science, Fudan University , Shanghai 200433, People's Republic of China
- Xianglei Chen
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]
- Shi Dai
- School of Science, Western Sydney University , Locked Bag 1797, Penrith NSW 2751, Australia
- Chen-Hui Niu
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]; Institute of Astrophysics, Central China Normal University , Wuhan 430079, Hubei, People's Republic of China
- Mengyao Xue
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]
- Ju-Mei Yao
- ORCiD
- Xinjiang Astronomical Observatory, Chinese Academy of Sciences , Urumqi, Xinjiang 830011, People's Republic of China
- Bing Zhang
- ORCiD
- Nevada Center for Astrophysics, University of Nevada , Las Vegas, NV 89154, USA; Department of Physics and Astronomy, University of Nevada , Las Vegas, NV 89154, USA
- Junshuo Zhang
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]
- Weiwei Zhu
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]; Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University , Beijing 102206, People's Republic of China
- Jintao Xie
- Research Center for Astronomical Computing, Zhejiang Laboratory , Hangzhou 311100, People's Republic of China ; [email protected], [email protected]
- Yuhao Zhu
- National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101, People's Republic of China ; [email protected], [email protected]; University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China
- DOI
- https://doi.org/10.3847/1538-4357/ad7a64
- Journal volume & issue
-
Vol. 974,
no. 2
p. 296
Abstract
Fast radio bursts (FRBs) are bright radio bursts originating at cosmological distances. Only three repeating FRBs FRB 20121102A, FRB 20190520B, and FRB 20201124A among ∼60 known repeating FRBs have circular polarization. We observed the FRB 20220912A with the Robert C. Byrd Green Bank Telescope (GBT) at L -band on 2022 October 24 and detected 128 bursts in 1.4 hr, corresponding to a burst rate of about 90 hr ^−1 , which is the highest yet for FRBs observed by the GBT. The average rotation measure (RM) was −0.4 ± 0.3 rad m ^−2 with negligible intraday RM change, indicating a likely nonmagneto-ionic environment. A total of 61% of bursts have a linear polarization fraction greater than 90%. Approximately 56% of the bright bursts have circular polarization. A downward drift in frequency and polarization angle swings were found in our sample. The characterization of FRB 20220912A indicates that the circular polarization is unlikely to be caused by the magneto-ionic environment for at least some of the repeating FRB population.
Keywords
