TWIST-INDUCED MAGNETOSPHERE RECONFIGURATION FOR INTERMITTENT PULSARS
文献类型：期刊论文
| 作者 | Huang, Lei1; Yu C(余聪)2,3 ; Tong, Hao4
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2016-08-10 |
| 卷号 | 827期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | instabilities pulsars: general stars: magnetars stars: magnetic field stars: neutron |
| 通讯作者 | Huang, L (reprint author), Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China. |
| 产权排序 | 第二完成单位 |
| 英文摘要 | We propose that the magnetosphere reconfiguration induced by magnetic twists in the closed field line region can account for the mode. switching of intermittent pulsars. We carefully investigate the properties of axisymmetric force-free pulsar magnetospheres with magnetic twists in closed field line regions around the polar caps. The magnetosphere with twisted closed lines leads to enhanced spin-down rates. The enhancement in spin-down rate depends on the size of the. region with twisted closed lines. Typically, it is increased by a factor of similar to 2, which is consistent with the intermittent pulsars' spin-down behavior during the "off" and "on" states. We find that. there is a threshold of maximal twist angle Delta phi(thres) similar to 1. The magnetosphere is stable only if the closed line twist angle is less than Delta phi(thres). Beyond this value, the magnetosphere becomes unstable and gets untwisted. The spin-down rate would reduce to its off-state value. The quasi-periodicity in spin-down rate change can be explained by long-term activities in the star's crust and the untwisting induced by MHD instability. The estimated duration of on-state is about 1. week, consistent with observations. Due to the MHD instability, there exists an upper limit for the spin-down ratio (f similar to 3) between the on-state and the off-state, if the Y-point remains at the light cylinder. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MAGNETAR GIANT FLARES ; FLUX ROPE ERUPTIONS ; X-RAY PULSARS ; SPIN-DOWN ; CURRENT SHEETS ; NEUTRON-STARS ; RADIO ; FIELD ; B0540-69 ; BEHAVIOR |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.3847/0004-637X/827/1/80/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000382009500080 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9691]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, 200030, China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China 3.Key Laboratory for the Structure and Evolution of Celestial Object, Chinese Academy of Sciences, Kunming, 650011, China 4.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China |
| 推荐引用方式 GB/T 7714 | Huang, Lei,Yu C,Tong, Hao. TWIST-INDUCED MAGNETOSPHERE RECONFIGURATION FOR INTERMITTENT PULSARS[J]. ASTROPHYSICAL JOURNAL,2016,827(1). |
| APA | Huang, Lei,Yu C,&Tong, Hao.(2016).TWIST-INDUCED MAGNETOSPHERE RECONFIGURATION FOR INTERMITTENT PULSARS.ASTROPHYSICAL JOURNAL,827(1). |
| MLA | Huang, Lei,et al."TWIST-INDUCED MAGNETOSPHERE RECONFIGURATION FOR INTERMITTENT PULSARS".ASTROPHYSICAL JOURNAL 827.1(2016). |
入库方式： OAI收割
来源：云南天文台
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