Characteristics of Emission Non-nulling Pulsars Through Simulation

作     者：Rai Yuen Rai Yuen

作者机构：Xinjiang Astronomical ObservatoryChinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio AstrophysicsChinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio AstronomyChinese Academy of SciencesNanjing 210008China SIfASchool of PhysicsUniversity of SydneySydneyNSW2006Australia 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2024年第24卷第4期

页      面：91-102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 SKA Program of China No.2020SKA0120200 the National Key Program for Science and Technology Research and Development No.2022YFC2205201 the National Natural Science Foundation of China(NSFC,grant Nos.12288102,12041303,and 12041304) the Major Science and Technology Program of Xinjiang Uygur Autonomous Region No.2022A03013-2 the open program of the Key Laboratory of Xinjiang Uygur Autonomous Region No.2020D04049 

主　　题：radiation mechanisms:non thermal stars:neutron (stars:)pulsars:general 

摘      要：We investigate the population and several properties of radio pulsars whose emission does not null(non-nulling)through simulation of a large pulsar *** from a pulsar is identified as non-nulling if(i)the emission does not cease across the whole pulse profile,and(ii)the emission is ***(i),we adopt a model for switching in the plasma charge density,and emission persists if the charge density is ***(ii),we assume that detectable emission originates from source points where it is emitted tangentially to the magnetic field-line and parallel to the *** find that pulsars exhibiting non-nulling emission possess obliquity angles with an average of 42°.5,and almost half the samples maintain a duty cycle between 0.05 and ***,the pulsar population is not fixed but dependent on the obliquity angle,with the population peaking at 20°.In addition,three evolutionary phases are identified in the pulsar population as the obliquity angle evolves,with the majority of samples having an obliquity angle between 20°and 65°.Our results also suggest that emission from a pulsar may evolve between nulling and non-nulling during its lifetime.