TWIST-INDUCED MAGNETOSPHERE RECONFIGURATION FOR INTERMITTENT PULSARS
文献类型：期刊论文
| 作者 | Huang, Lei1; Yu, Cong2,3; Tong, Hao4
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2016-08-10 |
| 卷号 | 827期号:1页码:80 |
| 通讯作者邮箱 | muduri@shao.ac.cn;cyu@ynao.ac.cn |
| ISSN号 | 0004-637X |
| 关键词 | instabilities pulsars: general stars: magnetars stars: magnetic field stars: neutron |
| 通讯作者 | Lei Huang ; Cong Yu |
| 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. |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000382009500080 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/1406]  |
| 专题 | 脉冲星研究团组 新疆天文台_射电天文研究室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China 3.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Object, Kunming 650011, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Lei,Yu, Cong,Tong, Hao. TWIST-INDUCED MAGNETOSPHERE RECONFIGURATION FOR INTERMITTENT PULSARS[J]. ASTROPHYSICAL JOURNAL,2016,827(1):80. |
| APA | Huang, Lei,Yu, Cong,&Tong, Hao.(2016).TWIST-INDUCED MAGNETOSPHERE RECONFIGURATION FOR INTERMITTENT PULSARS.ASTROPHYSICAL JOURNAL,827(1),80. |
| MLA | Huang, Lei,et al."TWIST-INDUCED MAGNETOSPHERE RECONFIGURATION FOR INTERMITTENT PULSARS".ASTROPHYSICAL JOURNAL 827.1(2016):80. |
入库方式： OAI收割
来源：新疆天文台
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