Changes in spin-down rate and intermittent pulsars
文献类型：期刊论文
| 作者 | Yuen, R.1,2,3
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 484期号:1页码:1359-1365 |
| ISSN号 | 0035-8711 |
| 关键词 | radiation mechanisms: non-thermal pulsars: general |
| DOI | 10.1093/mnras/stz077 |
| 产权排序 | 1 |
| 英文摘要 | We investigate properties of the emission 'on' and 'off' states in intermittent pulsars by modelling of the changes in spin-down rate between the two states, described by S-R = (omega) over dot(on)/(omega) over dot(off), as due to discrete changes of the spin-down torque in a magnetosphere of multiple states. In this model, each of the different spin-down rates corresponds to a unique magnetospheric state with a charge filling fraction. designated by the parameter y, and switching in the spin-down rate corresponds to a jump in the y value resulting in an abrupt change in S-R. We obtain trends of change in y(off) as a function of S-R with and without presuming y(on) and find that the magnetosphere is non-vacuum in the emission-off state as opposed to traditionally assumed. We consider two intermittent pulsars as example cases for the model. The identification of S-R up to six in our model implies that pulsars with large S-R is possible. We investigate the charge density, as indicated by y, in each emission state as a function of obliquity angle, alpha, for different S-R. Assuming a simple correlation between alpha and S-R, we estimate that changes in the latter as pulsar ages should be detectable. Our results suggest that more distinguishing features for intermittency are likely found in the emission-off state of an intermittent pulsar with small alpha. |
| WOS关键词 | RADIO PULSAR ; EMISSION ; ACCELERATION ; ALIGNMENT ; MODEL ; EVOLUTION |
| 资助项目 | NSFC[11573059] ; NSFC[U1531137] ; West Light Foundation of the Chinese Academy of Sciences[2016-QNXZ-B-24] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000462293100095 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/2565]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Yuen, R. |
| 作者单位 | 1.Chinese Acad Sci, Kev Lab Radio Astron, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia 3.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuen, R.. Changes in spin-down rate and intermittent pulsars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,484(1):1359-1365. |
| APA | Yuen, R..(2019).Changes in spin-down rate and intermittent pulsars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,484(1),1359-1365. |
| MLA | Yuen, R.."Changes in spin-down rate and intermittent pulsars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 484.1(2019):1359-1365. |
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来源：新疆天文台
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