The FAST Galactic Plane Pulsar Snapshot *** of 76 Galactic Rotating Radio Transients and the Enigma of RRATs
作者机构：National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of AstronomyUniversity of Chinese Academy of SciencesBeijing 100049China Department of AstronomySchool of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China National Astronomical Data CenterGreat Bay AreaGuangzhou 510006China Xinjiang Astronomical ObservatoryChinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio AstronomyChinese Academy of SciencesNanjing 210008China Department of AstronomyPeking UniversityBeijing 100871China School of Physical Science and TechnologySouthwest UniversityChongqing 400715China
出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)
年 卷 期：2023年第23卷第10期
页 面：1-70页
核心收录：
学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学]
基 金：This project,as one of five key projects,is being carried out by using FAST,a Chinese national mega-science facility built and operated by the National Astronomical Observatories,Chinese Academy of Sciences supported by the National Natural Science Foundation of China(NSFC,Nos.11988101 and 11833009) the Key Research Program of the Chinese Academy of Sciences(grant No.QYZDJ-SSWSLH021) supported by the Cultivation Project for the FAST scientific Payoff and Research Achievement of CAMS-CAS supported by NSFC No.12133004,partially supported by NSFC No.U1731120 partially supported by the NSFC No.11873058,partially supported by NSFC No.U2031115 partially supported by the National SKA program of China No.2020SKA0120200 partially supported by the Guangzhou Science and Technology Project No.202102010466
主 题：(stars:)pulsars:general surveys methods:data analysis
摘 要：We have carried out the Galactic Plane Pulsar Snapshot(GPPS)survey by using the Five-hundred-meter Aperture Spherical radio Telescope(FAST),the most sensitive systematic pulsar survey in the Galactic *** addition to more than 500 pulsars already discovered through normal periodical search,we report here the discovery of 76 new transient radio sources with sporadic strong pulses,detected by using the newly developed module for a sensitive single-pulse *** small DM values suggest that they all are Galactic rotating radio transients(RRATs).They show different properties in the follow-up *** radio pulses have been detected from 26 transient radio sources but no periods can be found due to a limited small number of pulses from all FAST *** followup observations show that 16 transient sources are newly identified as being the prototypes of RRATs with a period already determined from more detected sporadic pulses,and 10 sources are extremely nulling pulsars,and 24 sources are weak pulsars with sparse strong *** the other hand,48 previously known RRATs have been detected by the FAST,either during verification observations for the GPPS survey or through targeted observations of applied normal FAST *** for one RRAT with four pulses detected in a session of 5-minute observation and four RRATs with only one pulse detected in a session,sensitive FAST observations reveal that 43 RRATs are just generally weak pulsars with sporadic strong pulses or simply very nulling pulsars,so that the previously known RRATs always have an extreme emission state together with a normal hardly detectable weak emission *** is echoed by the two normal pulsars J1938+2213 and J1946+1449 with occasional brightening *** strong pulses of RRATs are very outstanding in the energy distribution,their polarization angle variations follow the polarization angle curve of the averaged normal pulse profile,suggesting that the predominant s
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