MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY
文献类型：期刊论文
| 作者 | Lu, J. G.1,2; Du, Y. J.3; Hao LF(郝龙飞)4; Yan, Z.5; Liu, Z. Y.6; Lee, K. J.7; Qiao, G. J.2; Shang, L. H.8,9; Wang, M.4 ; Xu, R. X.1,2,7
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2016-01-10 |
| 卷号 | 916页码:2 |
| 关键词 | acceleration of particles pulsars: general pulsars: individual (PSR B1133+16) radiation mechanisms: non-thermal |
| ISSN号 | 0004-6256 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Lu, JG (reprint author), Peking Univ, State Key Lab Nucl Sci & Technol, Beijing 100871, Peoples R China. |
| 英文摘要 | 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | INVERSE COMPTON-SCATTERING ; GAMMA-RAY EMISSION ; PULSAR EMISSION ; FREQUENCY-DEPENDENCE ; ANNULAR GAP ; EMPIRICAL-THEORY ; CRAB PULSAR ; ICS MODEL ; BEAMS ; CORE |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.3847/0004-637X/816/2/76/meta# |
| 语种 | 英语 |
| WOS记录号 | WOS:000368238500028 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9399]  |
| 专题 | 云南天文台_射电天文研究组 |
| 作者单位 | 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 |
| 推荐引用方式 GB/T 7714 | Lu, J. G.,Du, Y. J.,Hao LF,et al. MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY[J]. ASTROPHYSICAL JOURNAL,2016,916:2. |
| APA | Lu, J. G..,Du, Y. J..,郝龙飞.,Yan, Z..,Liu, Z. Y..,...&Hao LF.(2016).MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY.ASTROPHYSICAL JOURNAL,916,2. |
| MLA | Lu, J. G.,et al."MULTI-FREQUENCY RADIO PROFILES OF PSR B1133+16: RADIATION LOCATION AND PARTICLE ENERGY".ASTROPHYSICAL JOURNAL 916(2016):2. |
入库方式： OAI收割
来源：云南天文台
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