2020/10/18 by S. X. Du, Shuang Du, Weihua Wang +2
Physics and Astronomy · #Astrophysical Phenomena and Observations #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Pulsars and Gravitational Waves Research #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.2010.08549
8 pages, 3 figure
openalex publication_date 2020/10/18 · arxiv created 2021/02/27 · arxiv updated 2021/03/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The two radio pulses (TRPs) from SGR 1935+2154 detected by \citeBKRMHB and \cite2020arXiv200510324T have similar features to that of cosmological fast radio bursts (FRBs). Many authors directly call the TRPs as FRB 200428 without consider two questions carefully. (1) Are the TRPs just two brighter subpulses of a normal radio pulse liking the normal radio pulses seen in other magnetars during their outburst? (2) If the TRPs are two bursts of an FRB, does this make other FRBs difficult to understand? In this paper, we try to clarify these two questions. First, we compare these TRPs with previous observations of normal radio pulses from pulsars and magnetars, and find that the TRPs should be produced by different mechanism from that of normal radio pulses. We then investigate the second question by assuming the TRPs have the same origin as that of periodically repeating FRBs and find that the origin of the periodicity of periodically repeating FRBs should not be induced by precession. Otherwise, we should expect that the TRPs are not an FRB, at least the TRPs don't have the same origin as that of periodically repeating FRBs.