Variations in pulsar subpulse drift rate
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 | 2019-06-01 |
卷号 | 486期号:2页码:2011-2019 |
ISSN号 | 0035-8711 |
关键词 | radiation mechanisms: non-thermal pulsar: general |
DOI | 10.1093/mnras/stz951 |
通讯作者 | Yuen, R.(ryuen@xao.ac.cn) |
英文摘要 | We explore changes in subpulse drift rate in a model for pulsar magnetospheres of multiple magnetospheric states incorporating the apparent motion of the visible point. In this model, subpulse drift rate is determined by the relative motion between corotation and the plasma flow in a magnetospheric state, designated by the parameter y, as seen by an observer, and switching in drift mode corresponds to an abrupt jump in y causing variation in the plasma flow. We demonstrate that changes in drift rate occur both as functions of pulsar rotational phase and y, and that subpulses may appear stationary even when the plasma flow is not in corotation with the star. Our results suggest that pulsars with multiple subpulse drift modes may constitute a much larger population. We consider the different subpulse drift rates in PSRs J1822 - 2256, B0809+74 and B1918+19 as examples to illustrate that each drift mode corresponds to a unique magnetospheric state, and we discuss its implication in relation to the charge density as revealed by the value of y. |
WOS关键词 | SUB-PULSES ; EMISSION ; MODULATION ; POLARIZATION ; INSTABILITY ; RADIATION ; GEOMETRY ; MODEL |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000474899400041 |
源URL | [http://libir.pmo.ac.cn/handle/332002/27347] |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Yuen, R. |
作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 3.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia |
推荐引用方式 GB/T 7714 | Yuen, R.. Variations in pulsar subpulse drift rate[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,486(2):2011-2019. |
APA | Yuen, R..(2019).Variations in pulsar subpulse drift rate.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,486(2),2011-2019. |
MLA | Yuen, R.."Variations in pulsar subpulse drift rate".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 486.2(2019):2011-2019. |
入库方式: OAI收割
来源:紫金山天文台
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