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典型文献
The Time and Energy Dependence of the Vela Pulsar's Pulse Profile inγ-Ray
文献摘要:
We analyze the time and energy dependence of the Vela pulsar's pulse profile using 13 yr observations from the Large Area Telescope on the Fermi Gamma-ray Space Telescope. It is found that the pulse profile of the Vela pulsar inγ-ray changes with time. We parameterize the pulse profile and find that different shape parameters show fiuctuations rather than gradual changes with time. However, these time variation trends are insignificant due to limited statistics. The pulse profile of the Vela pulsar displays clear energy dependence inγ-ray. Different shape parameters are accurately obtained or updated, especially the phase separations among different pulses. Their energy evolution trends are quantified for the first time, which will provide restrictions on currentγ-ray emission models. For the Vela pulsar, we also find a turning point at phase. Before and after this phase, the relative intensity of the pulse profile evolves with energy with the opposite trend.
文献关键词:
作者姓名:
Lin-Li Yan;Ming-Yu Ge;You-Li Tuo;Ling-jun Wang;Qing-yong Zhou
作者机构:
School of Mathematics and Physics,Anhui Jianzhu University,Hefei,Anhui 230601,China;Key Laboratory of Architectural Acoustics Environment of Anhui High Education Institutes,Hefei,Anhui 230601,China;Key Laboratory of Advanced Electronic Materials and Devices,Anhui Jianzhu University,Hefei,Anhui 230601,China;Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Geographic Information Engineering,Xi'an Institute of Surveying and Mapping,Xi'an 710054,China
引用格式:
[1]Lin-Li Yan;Ming-Yu Ge;You-Li Tuo;Ling-jun Wang;Qing-yong Zhou-.The Time and Energy Dependence of the Vela Pulsar's Pulse Profile inγ-Ray)[J].天文和天体物理学研究,2022(04):128-136
A类:
Pulsar,fiuctuations
B类:
Time,Energy,Dependence,Vela,Pulse,Profile,Ray,We,analyze,energy,dependence,pulsar,profile,using,yr,observations,from,Large,Area,Telescope,Fermi,Gamma,ray,Space,It,found,that,changes,parameterize,find,different,shape,parameters,show,rather,than,gradual,However,these,variation,trends,are,insignificant,due,limited,statistics,displays,clear,Different,accurately,obtained,updated,especially,phase,separations,among,pulses,Their,evolution,quantified,first,which,will,provide,restrictions,current,emission,models,For,also,turning,point,Before,after,this,relative,intensity,evolves,opposite
AB值:
0.545813
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