KMS of Xinjiang Astronomical Observatory, CAS
| MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY | |
Lu, J. G.1,2; Du, Y. J.3; Hao, L. F.4; Yan, Z.5; Liu, Z. Y.6 ; Lee, K. J.7; Qiao, G. J.2; Shang, L. H.8; Wang, M.4; Xu, R. X.1,2,7; Yue, Y. L.9; Zhi, Q. J.8
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| 2016 | |
| Source Publication | Astrophysical Journal
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| ISSN | 0004-637X |
| Volume | 816Issue:2Pages:76 |
| Contribution Rank | 6 |
| Abstract | The pulse profile of PSR B1133+16 is usually regarded as a conal double structure. However, its multi-frequency profiles cannot simply be fitted with two Gaussian functions, and a third component is always needed to fit the bridge region (between two peaks). This would introduce additional, redundant parameters. In this paper, through a comparison of five fitting functions (Gaussian, von Mises, hyperbolic secant, square hyperbolic secant, and Lorentz), it is found that the square hyperbolic secant function can best reproduce the profile, yielding an improved fit. Moreover, a symmetric 2D radiation beam function, instead of a simple 1D Gaussian function, is used to fit the profile. Each profile with either well-resolved or not-so-well-resolved peaks could be fitted adequately using this beam function, and the bridge emission between the two peaks does not need to be a new component. Adopting inclination and impact angles based on polarization measurements, the opening angle (theta(mu)0) of the radiation beam in a certain frequency band is derived from beam-function fitting. The corresponding radiation altitudes are then calculated. Based on multi-frequency profiles, we also computed the Lorentz factors of the particles and their dispersion at those locations in both the curvature-radiation and inverse-Compton-scattering models. We found that the Lorentz factors of the particles decrease rapidly as the radiation altitude increases. Besides, the radiation prefers to be generated in an annular region rather than the core region, and this needs further validation. |
| Correspondent Email | lujig@pku.edu.cn |
| Keyword | acceleration of particles pulsars: general pulsars: individual (PSR B1133+16) radiation mechanisms: non-thermal INVERSE COMPTON-SCATTERING GAMMA-RAY EMISSION PULSAR EMISSION FREQUENCY-DEPENDENCE ANNULAR GAP EMPIRICAL-THEORY CRAB PULSAR ICS MODEL BEAMS CORE Astronomy & Astrophysics |
| Subtype | Article |
| DOI | 10.3847/0004-637x/816/2/76 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000368238500028 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/3237 |
| Collection | 已撤销研究室/团组_软件技术组 |
| Affiliation | 1.State Key Laboratory of Nuclear Science and Technology, Peking University, Beijing 100871, China; 2.School of Physics, Peking University, Beijing 100871, China; 3.Qian Xuesen Laboratory of Space Technology, Beijing 100094, China; 4.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China; 5.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; 6.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China; 7.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China; 8.School of Physics and Electronic Science, Guizhou Normal University, and NAOC-GZNU Center for Astronomy Research and Education,;(Guiyang, Guizhou 550001, China; 9.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China |
| Recommended Citation GB/T 7714 | Lu, J. G.,Du, Y. J.,Hao, L. F.,et al. MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY[J]. Astrophysical Journal,2016,816(2):76. |
| APA | Lu, J. G..,Du, Y. J..,Hao, L. F..,Yan, Z..,Liu, Z. Y..,...&Zhi, Q. J..(2016).MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY.Astrophysical Journal,816(2),76. |
| MLA | Lu, J. G.,et al."MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY".Astrophysical Journal 816.2(2016):76. |
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| Lu-2016-MULTI-FREQUE（1259KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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