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Changes in spin-down rate and intermittent pulsars
Yuen, R.1,2,3
2019-03-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume484Issue:1Pages:1359-1365
Contribution Rank1
AbstractWe 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.
Keywordradiation mechanisms: non-thermal pulsars: general
DOI10.1093/mnras/stz077
Indexed BySCI
Language英语
WOS KeywordRADIO PULSAR ; EMISSION ; ACCELERATION ; ALIGNMENT ; MODEL ; EVOLUTION
Funding ProjectNSFC[11573059] ; NSFC[U1531137] ; West Light Foundation of the Chinese Academy of Sciences[2016-QNXZ-B-24]
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000462293100095
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/2566
Collection中国科学院新疆天文台
Corresponding AuthorYuen, R.
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
2.Chinese Acad Sci, Kev Lab Radio Astron, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
3.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
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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