J
J. R. Niu
Researcher at Chinese Academy of Sciences
Publications - 29
Citations - 260
J. R. Niu is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Pulsar & Radio telescope. The author has an hindex of 2, co-authored 3 publications receiving 87 citations.
Papers
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Journal ArticleDOI
No pulsed radio emission during a bursting phase of a Galactic magnetar.
L. Lin,Chao Zhang,Chao Zhang,Pengfei Wang,H. Gao,X. Guan,J. L. Han,J. C. Jiang,J. C. Jiang,Peng Jiang,Kejia Lee,Kejia Lee,Di Li,Y. P. Men,Y. P. Men,C. C. Miao,C. H. Niu,J. R. Niu,Chenghua Sun,Boyuan Wang,Boyuan Wang,Zhong Lin Wang,Huibin Xu,Huibin Xu,Ji-Jing Xu,Jiejia Xu,Jiejia Xu,Yi Yang,Yujin Yang,Wenjing Yu,Bing Zhang,Bin-Bin Zhang,Bin-Bin Zhang,D. J. Zhou,Weiwei Zhu,A. J. Castro-Tirado,A. J. Castro-Tirado,Z. G. Dai,M. Y. Ge,Y. D. Hu,Y. D. Hu,Canyang Li,Yingfeng Li,Zhanqing Li,E. W. Liang,S. M. Jia,Richard Querel,L. Shao,Fa-Yin Wang,X. G. Wang,Xue-Feng Wu,S. L. Xiong,Renxin Xu,Y.-S. Yang,G. Q. Zhang,Shoudu Zhang,T. C. Zheng,J.-H. Zou +57 more
TL;DR: In this paper, an 8-hour radio observational campaign of the Galactic magnetar SGR 1935+2154, assisted by multi-wavelength data, indicates that associations between fast radio bursts and soft γ-ray bursts are rare.
Journal ArticleDOI
Frequency-dependent polarization of repeating fast radio bursts—implications for their origin
Yi Feng,Di Li,Yuan-Pei Yang,Yongkun Zhang,Weiwei Zhu,Bing Zhang,Wen-Bin Lu,Pei Wang,Shi Dai,Ryan Lynch,Jumei Yao,Jinchen Jiang,J. R. Niu,D. J. Zhou,Heng Xu,Chenchen Miao,C. H. Niu,L. Meng,Lei Qin,Chao-Wei Tsai,Bojun Wang,Mengyao Xue,Youling Yue,Mao Yuan,Songbo Zhang,Lei Zhang +25 more
TL;DR: Feng et al. as mentioned in this paper measured the polarization of five repeating fast radio bursts and found that each source is polarized at high frequencies but becomes depolarized below a threshold frequency that varies between sources.
Journal ArticleDOI
No pulsed radio emission during a bursting phase of a Galactic magnetar
L. Lin,Chao Zhang,Chao Zhang,Pengfei Wang,H. Gao,X. Guan,J. L. Han,J. C. Jiang,J. C. Jiang,Peng Jiang,Kejia Lee,Kejia Lee,Di Li,Y. P. Men,Y. P. Men,C. C. Miao,C. H. Niu,J. R. Niu,Chenghua Sun,Boyuan Wang,Boyuan Wang,Zhong Lin Wang,Huibin Xu,Huibin Xu,Ji-Jing Xu,Jiejia Xu,Jiejia Xu,Yi Yang,Yujin Yang,Wenjing Yu,Bing Zhang,Bin-Bin Zhang,Bin-Bin Zhang,D. J. Zhou,Weiwei Zhu,A. J. Castro-Tirado,A. J. Castro-Tirado,Z. G. Dai,M. Y. Ge,Y. D. Hu,Y. D. Hu,Canyang Li,Yingfeng Li,Zhanqing Li,E. W. Liang,S. M. Jia,Richard Querel,L. Shao,Fa-Yin Wang,X. G. Wang,Xue-Feng Wu,S. L. Xiong,Renxin Xu,Y.-S. Yang,G. Q. Zhang,Shoudu Zhang,T. C. Zheng,J.-H. Zou +57 more
TL;DR: The results suggest that FRB-SGR burst associations are rare, and it is possible that the physical conditions required to achieve coherent radiation in SGR bursts are difficult to satisfy, and that only under extreme conditions could an FRB be associated with an SGR burst.
Posted Content
Stringent upper limits on pulsed radio emission during an active bursting phase of the Galactic magnetar SGRJ1935+2154
L. Lin,Chao Zhang,Pengfei Wang,H. Gao,X. Guan,J. L. Han,J. C. Jiang,Peng Jiang,Kejia Lee,Di Li,Y. P. Men,C. C. Miao,C. H. Niu,J. R. Niu,Chenghua Sun,Boyuan Wang,Zhong Lin Wang,Huibin Xu,Ji-Jing Xu,Jiejia Xu,Yi Yang,Yujin Yang,Wenjing Yu,B. Zhang,B.-B. Zhang,D. J. Zhou,Weiwei Zhu,A. J. Castro-Tirado,Z. G. Dai,M. Y. Ge,Y. D. Hu,Canyang Li,Yingfeng Li,Zhanqing Li,E. W. Liang,S. M. Jia,Richard Querel,L. Shao,Fa-Yin Wang,X. G. Wang,X. F. Wu,S. L. Xiong,Renxin Xu,Y.-S. Yang,G. Q. Zhang,Shoudu Zhang,T. C. Zheng,J.-H. Zou +47 more
TL;DR: In this article, the authors reported an eight-hour targeted observational campaign with the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in four observing sessions, assisted by multi-wavelength (optical and hard X-rays) observations.
Journal ArticleDOI
FAST Observations of an Extremely Active Episode of FRB 20201124A: I. Burst Morphology
D. J. Zhou,J. L. Han,B. G. Zhang,K J Lee,W. W. Zhu,D Li,W. Jing,Wei Wang,Y. Zhang,J. C. Jiang,J. R. Niu,Rui Luo,C. F. Zhang,B. J. Wang,J. W. Xu,P. Wang,Z. Yang,Y. Feng +17 more
TL;DR: In this paper , the authors performed a detailed morphological study of 624 bursts using the two-dimensional frequency-time "waterfall" plots, with a burst (or cluster-burst) defined as an emission episode during which the adjacent emission peaks have a separation shorter than 400 ms.