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, Yi1,2; Zhang, Shuang-Nan1,3,4; Liao, Jin-Yuan2,3 |
| 刊名 | Research in astronomy and astrophysics
 |
| 出版日期 | 2015-07-01 |
| 卷号 | 15期号:7页码:963-974 |
| ISSN号 | 1674-4527 |
| 关键词 | Stars: neutron Pulsars: individual (b0329+54) Pulsars: general Magnetic fields |
| DOI | 10.1088/1674-4527/15/7/004 |
| 英文摘要 | We model the evolution of the spin frequency's second derivative nu 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 nu 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 nu 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 vertical bar vertical bar and vertical bar n vertical bar versus characteristic age tau(c) diagrams. it is found that the magnetic field oscillation model with decay index alpha = 0 can reproduce the distributions quite well. compared with magnetic field decay due to the ambipolar diffusion (alpha = 0.5) and the hall cascade (alpha = 1.0), the model with no long term decay (alpha = 0) is clearly preferred for old pulsars by the p-values of the two-dimensional kolmogorov-smirnov test. |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:000356868900004 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/1639621 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Xie, Yi |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 4.Univ Alabama, Dept Phys, Huntsville, AL 35899 USA |
| 推荐引用方式 GB/T 7714 | Xie, Yi,Zhang, Shuang-Nan,Liao, Jin-Yuan. 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):963-974. |
| APA | Xie, Yi,Zhang, Shuang-Nan,&Liao, Jin-Yuan.(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),963-974. |
| 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):963-974. |
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