Modeling the evolution and distribution of the frequency’s second derivative and the braking index of pulsar spin
文献类型：期刊论文
| 作者 | Xie Yi1; Zhang Shuangnan1; Liao Jinyuan2 |
| 刊名 | Research in Astronomy and Astrophysics
 |
| 出版日期 | 2015 |
| 卷号 | 15期号:7页码:963 |
| ISSN号 | 1674-4527 |
| 英文摘要 | We model the evolution of the spin frequency’s second derivative v and the braking index n of radio pulsars with simulations within the phenomenologicalmodel of their surface magnetic field evolution, which contains a long-term power-law decay modulated by short-term oscillations. For the pulsar PSR B0329+54, a model with three oscillation components can reproduce its v variation. We show that the “averaged” n is different from the instantaneous n, and its oscillation magnitude decreases abruptly as the time span increases, due to the “averaging” effect. The simulated timing residuals agree with the main features of the reported data. Our model predicts that the averaged v of PSR B0329+54 will start to decrease rapidly with newer data beyond those used in Hobbs et al.We further performMonte Carlo simulations for the distribution of the reported data in |v| and |n| versus characteristic age τc diagrams. It is found that the magnetic field oscillation model with decay index α= 0 can reproduce the distributions quite well. Compared with magnetic field decay due to the ambipolar diffusion (α = 0.5) and the Hall cascade (α = 1.0), the model with no long term decay (α = 0) is clearly preferred for old pulsars by the p-values of the two-dimensional Kolmogorov-Smirnov test. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/39582]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中国科学院国家天文台 2.中国科学院大学 |
| 推荐引用方式 GB/T 7714 | Xie Yi,Zhang Shuangnan,Liao Jinyuan. Modeling the evolution and distribution of the frequency’s second derivative and the braking index of pulsar spin[J]. Research in Astronomy and Astrophysics,2015,15(7):963. |
| APA | Xie Yi,Zhang Shuangnan,&Liao Jinyuan.(2015).Modeling the evolution and distribution of the frequency’s second derivative and the braking index of pulsar spin.Research in Astronomy and Astrophysics,15(7),963. |
| MLA | Xie Yi,et al."Modeling the evolution and distribution of the frequency’s second derivative and the braking index of pulsar spin".Research in Astronomy and Astrophysics 15.7(2015):963. |
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来源：国家天文台
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