Timing and Single-pulse Study of Pulsar J1909+0122 Discovered by CRAFTS

作     者：Yutong Chen Pei Wang Di Li Erbil Gügercinoğlu Rushuang Zhao Lingqi Meng Jianping Yuan Jiarui Niu Weiwei Zhu Yi Feng Chenchen Miao Chenhui Niu Qingdong Wu Na Wang Shen Wang Xiaoyao Xie Mengyao Xue Jumei Yao Mao Yuan Shanping You Xuhong Yu Youling Yue Jie Zhang Junshuo Zhang Lei Zhang Yabiao Wang Zhenye Gan Yuxi Li Zhongyi Sun Chengjie Wang Yutong Chen;Pei Wang;Di Li;Erbil Gügercino?lu;Rushuang Zhao;Lingqi Meng;Jianping Yuan;Jiarui Niu;Weiwei Zhu;Yi Feng;Chenchen Miao;Chenhui Niu;Qingdong Wu;Na Wang;Shen Wang;Xiaoyao Xie;Mengyao Xue;Jumei Yao;Mao Yuan;Shanping You;Xuhong Yu;Youling Yue;Jie Zhang;Junshuo Zhang;Lei Zhang;Yabiao Wang;Zhenye Gan;Yuxi Li;Zhongyi Sun;Chengjie Wang

作者机构：National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China University of Chinese Academy of SciencesBeijing 100049China Institute for Frontiers in Astronomy and AstrophysicsBeijing Normal UniversityBeijing 102206China Research Center for Intelligent Computing PlatformsZhejiang LaboratoryHangzhou 311100China Guizhou Normal UniversityGuiyang 550001China Xinjiang Astronomical ObservatoryChinese Academy of SciencesUrumqi 830011China College of Physical Science and TechnologyCentral China Normal UniversityWuhan 430079China Fudan UniversityShanghai 200443China Qilu Normal UniversityJinan 250200China Tencent Youtu LabShanghai 200233China 

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8期

页      面：319-331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：supported by the National Natural Science Foundation of China(NSFC)Grant Nos.11988101,1172531312041303,12041304,12203045,12203070,12103013,T2241020 the National SKA Program of China(Nos.2020SKA0120200,2022SKA0130100,2022SKA0130104) the Foundation of Science and Technology of Guizhou Province(No.(2021)023) the Foundation of Guizhou Provincial Education Department(Nos.KY(2021)303,KY(2020)003) support from the National Natural Science Foundation of China under grant U2031117 the Youth Innovation Promotion Association CAS(id.2021055) CAS Project for Young Scientists in Basic Research(grant YSBR006) the Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMS-CAS 

主　　题：(stars:)pulsars general-(stars:)pulsars individual(PSR J1909+0122)-stars neutron 

摘      要：We report the discovery of PSR J1909+0122 by the Five-hundred-meter Aperture Spherical Radio Telescope(FAST)as part of the Commensal Radio Astronomy FAST *** J1909+0122 has a spin period of 1.257 s and a dispersion measure of 186.2 pc cm^(-3).The averaged pulse profile shows two distinct *** performed a single-pulse study based on a one-hour observation at 1.25 GHz on 2021 August *** used a threshold of 5σ_(ep) to measure the nulling fraction(NF)as 63%±1.5%.The longitude-resolved fluctuation spectra and fast Fourier transform spectra of the binary sequences revealed the quasi-periodicity of nulling with a period of 30 rotation *** examined the reliability of the periodicity by comparing it to random noise *** NF,E,and modulation periodicity P_(M) of PSR J1909+0122 were compared with other periodic nulling pulsars,showing that the source of J1909+0122 has the second largest NF in the ***-term timing observations over six months were used to derive the phase-connected ephemeris of this *** measured P and P values disfavor dipolar geometry for polar gap models,and the prediction for a space-charge-limited flow model in the case of inverse Compton scattering is only just above the death *** this work,PSR J1909+0122 has revealed possible correlations between nulling behavior and pulsar properties,which will help to shed light on the pulsar emission mechanism and its temporal evolution in future observations.