The origin of fast radio bursts(FRBs),the brightest cosmic explosion in radio bands,remains unknown.We introduce here a novel method for a comprehensive analysis of active FRBs’behaviors in the timeenergy domain.Usin...The origin of fast radio bursts(FRBs),the brightest cosmic explosion in radio bands,remains unknown.We introduce here a novel method for a comprehensive analysis of active FRBs’behaviors in the timeenergy domain.Using"Pincus Index"and"Maximum Lyapunov Exponent",we were able to quantify the randomness and chaoticity,respectively,of the bursting events and put FRBs in the context of common transient physical phenomena,such as pulsar,earthquakes,and solar flares.In the bivariate timeenergy domain,repeated FRB bursts’behaviors deviate significantly(more random,less chaotic)from pulsars,earthquakes,and solar flares.The waiting times between FRB bursts and the corresponding energy changes exhibit no correlation and remain unpredictable,suggesting that the emission of FRBs does not exhibit the time and energy clustering observed in seismic events.The pronounced stochasticity may arise from a singular source with high entropy or the combination of diverse emission mechanisms/sites.Consequently,our methodology serves as a pragmatic tool for illustrating the congruities and distinctions among diverse physical processes.展开更多
基金supported by the Open Project Program of the Key Laboratory of FAST,Chinese Academy of Sciencessupported by the National Natural Science Foundation of China(NSFC)(11988101,11725313,11690024,and12203045)+11 种基金the Key Research Project of Zhejiang Lab(2021PE0AC03)supported by NSFC(fU2031117)the Youth Innovation Promotion Association CAS(ID.2021055)the Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMS-CASsupported by NSFC(12203069)the National SKA Program of China(2022SKA0130100)the Office Leading Group for Cyberspace Affairs,CAS(CAS-WX2023PY-0102)funded by the Australian Governmentsupported by the National Science Foundation of Xinjiang Uygur Autonomous Region(2022D01D85)the Major Science and Technology Program of Xinjiang Uygur Autonomous Region(2022A03013-2)the Tianchi Talent projectthe CAS Project for Young Scientists in Basic Research(YSBR-063)。
文摘The origin of fast radio bursts(FRBs),the brightest cosmic explosion in radio bands,remains unknown.We introduce here a novel method for a comprehensive analysis of active FRBs’behaviors in the timeenergy domain.Using"Pincus Index"and"Maximum Lyapunov Exponent",we were able to quantify the randomness and chaoticity,respectively,of the bursting events and put FRBs in the context of common transient physical phenomena,such as pulsar,earthquakes,and solar flares.In the bivariate timeenergy domain,repeated FRB bursts’behaviors deviate significantly(more random,less chaotic)from pulsars,earthquakes,and solar flares.The waiting times between FRB bursts and the corresponding energy changes exhibit no correlation and remain unpredictable,suggesting that the emission of FRBs does not exhibit the time and energy clustering observed in seismic events.The pronounced stochasticity may arise from a singular source with high entropy or the combination of diverse emission mechanisms/sites.Consequently,our methodology serves as a pragmatic tool for illustrating the congruities and distinctions among diverse physical processes.
