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Pulsar glitches in a strangeon star model
Lai, X. Y.1,2; Yun, C. A.1,3; Lu, J. G.4,5; Lu, G. L.3; Wang, Z. J.3; Xu, R. X.4,5
2018-05-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume476Issue:3Pages:3303-3309
Contribution Rank1
Abstract

Pulsar-like compact stars provide us a unique laboratory to explore properties of dense matter at supra-nuclear densities. One of the models for pulsar-like stars is that they are totally composed of "strangeons", and in this paper, we studied the pulsar glitches in a strangeon star model. Strangeon stars would be solidified during cooling, and the solid stars would be natural to have glitches as the result of starquakes. Based on the starquake model established before, we proposed that when the starquake occurs, the inner motion of the star which changes the moment of inertia and has impact on the glitch sizes, is divided into plastic flow and elastic motion. The plastic flow which is induced in the fractured part of the outer layer, would move tangentially to redistribute the matter of the star and would be hard to recover. The elastic motion, on the other hand, changes its shape and would recover significantly. Under this scenario, we could understand the behaviors of glitches without significant energy releasing, including the Crab and the Vela pulsars, in an uniform model. We derive the recovery coefficient as a function of glitch size, as well as the time interval between two successive glitches as the function of the released stress. Our results show consistency with observational data under reasonable ranges of parameters. The implications on the oblateness of the Crab and the Vela pulsars are discussed.

KeywordDense Matter Stars: Neutron Pulsars: General
SubtypeArticle
DOI10.1093/mnras/sty474
WOS HeadingsScience & Technology ; Physical Sciences
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSolid Quark Stars ; Neutron Starquakes ; Southern Pulsars ; Quakes
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000430944100033
Funding OrganizationWest Light Foundation(XBBS-2014-23) ; National Key R&D Program of China(2017YFA0402602) ; National Natural Science Foundation of China(11203018, 11503008, 1673002, U1531243) ; Strategic Priority Research Program of CAS(XDB23010200)
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/1917
Collection射电天文研究室_脉冲星研究团组
天文科普教育中心
其它
Corresponding AuthorLai, X. Y.; Xu, R. X.
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Hubei Univ Educ, Sch Phys & Engn, Wuhan 430205, Hubei, Peoples R China
3.Xinjiang Univ, Sch Phys, Urumqi 830046, Peoples R China
4.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
5.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lai, X. Y.,Yun, C. A.,Lu, J. G.,et al. Pulsar glitches in a strangeon star model[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,476(3):3303-3309.
APA Lai, X. Y.,Yun, C. A.,Lu, J. G.,Lu, G. L.,Wang, Z. J.,&Xu, R. X..(2018).Pulsar glitches in a strangeon star model.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,476(3),3303-3309.
MLA Lai, X. Y.,et al."Pulsar glitches in a strangeon star model".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 476.3(2018):3303-3309.
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