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Investigating the multifrequency pulse profiles of PSRs B0329+54 and B1642-03 in an inverse Compton scattering model

文献类型：期刊论文

作者Shang, Lun-Hua1,2; Lu, Ji-Guang3,4; Du, Yuan-Jie5; Hao, Long-Fei6; Li, Di2; Lee, Ke-Jia7; Li, Bin8,9; Li, Li-Xin7; Qiao, Guo-Jun3; Shen, Zhi-Qiang8,9
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2017-07-01
卷号468期号:4页码:4389-4398
ISSN号0035-8711
关键词radiation mechanisms: non-thermal stars: magnetic field stars: neutron pulsars: individual: PSR B0329+54 pulsars: individual: PSR B1642-03
DOI10.1093/mnras/stx815
通讯作者Shang, Lun-Hua(shanglh@nao.cas.cn) ; Qiao, Guo-Jun(gjn@pku.edu.cn) ; Zhi, Qi-Jun(qjzhi@gznu.edu.cn)
英文摘要Emission geometries, including emission region heights, beam shapes and radius-to-frequency mapping, are important clues for pulsar radiation models. Multiband radio observations reveal this valuable information. In this paper, we study two bright pulsars, PSRs B0329+54 and B1642-03, and observe them at high frequencies: 2.5, 5 and 8 GHz. The newly acquired data, together with historical archives, provide an atlas of multifrequency profiles spanning from 100 MHz to 10 GHz. We study the frequency evolution of pulse profiles as well as radiation regions using these data. First, we fit the pulse profiles with Gaussian functions to determine the phase of each component, and then we calculate the radiation altitudes of different emission components and radiation regions. We find that the inverse Compton scattering (ICS) model can reproduce the radiation geometry of these two pulsars. However, for PSR B0329+54, the radiation can be generated in either an annular gap (AG) or a core gap (CG), while the radiation of PSR B1642-03 can only be generated in a CG. This difference is caused by the inclination angle and the impact angle of these two pulsars. The relationship between the beaming angle (the angle between the radiation direction and the magnetic axis) and the radiation altitude versus frequency is also presented by modelling the beam-frequency evolution in the ICS model. The multiband pulse profiles of these two pulsars can be described well by the ICS model combined with the CG and AG.
WOS关键词GAMMA-RAY EMISSION ; MULTICOMPONENT GAUSSIAN FITS ; INNER ANNULAR GAP ; RADIO PULSARS ; WIDTH STATISTICS ; GEOMETRICAL ANALYSIS ; CURVATURE RADIATION ; INTEGRATED PROFILES ; MILLISECOND PULSARS ; HIGH-FREQUENCIES
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000402819700049
源URL[http://libir.pmo.ac.cn/handle/332002/23024]  
专题中国科学院紫金山天文台
通讯作者Shang, Lun-Hua; Qiao, Guo-Jun; Zhi, Qi-Jun
作者单位1.Guizhou Normal Univ, Sch Phys & Elect Sci, 116 Baoshan Rd, Guiyang 550001, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
3.Peking Univ, Sch Phys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
4.Peking Univ, State Key Lab Nucl Sci & Technol, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
5.Qian Xuesen Lab Space Technol, 104 Youyi Rd, Beijing 100094, Peoples R China
6.Chinese Acad Sci, Yunnan Astron Observ, 396 Yangfangwang, Guandu Dist 650011, Kunming, Peoples R China
7.Peking Univ, Kavil Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
8.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
9.Chinese Acad Sci, Key Lab Radio Astron, 80 Nandan Rd, Shanghai 200030, Peoples R China
10.NAOC GZNU, Ctr Astron Res & Educ, 116 Baoshan Rd, Guiyang 550001, Peoples R China
推荐引用方式
GB/T 7714		 Shang, Lun-Hua,Lu, Ji-Guang,Du, Yuan-Jie,et al. Investigating the multifrequency pulse profiles of PSRs B0329+54 and B1642-03 in an inverse Compton scattering model[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,468(4):4389-4398.
APA Shang, Lun-Hua.,Lu, Ji-Guang.,Du, Yuan-Jie.,Hao, Long-Fei.,Li, Di.,...&Zhao, Ru-Shuang.(2017).Investigating the multifrequency pulse profiles of PSRs B0329+54 and B1642-03 in an inverse Compton scattering model.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,468(4),4389-4398.
MLA Shang, Lun-Hua,et al."Investigating the multifrequency pulse profiles of PSRs B0329+54 and B1642-03 in an inverse Compton scattering model".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 468.4(2017):4389-4398.

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