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Variations in pulsar subpulse drift rate
Yuen, R.1,2,3
2019-06-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume486Issue:2Pages:2011-2019
Corresponding AuthorYuen, R.(ryuen@xao.ac.cn)
AbstractWe 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.
Keywordradiation mechanisms: non-thermal pulsar: general
DOI10.1093/mnras/stz951
WOS KeywordSUB-PULSES ; EMISSION ; MODULATION ; POLARIZATION ; INSTABILITY ; RADIATION ; GEOMETRY ; MODEL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000474899400041
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/27348
Collection中国科学院紫金山天文台
Corresponding AuthorYuen, R.
Affiliation1.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
Recommended Citation
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.
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