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Explaining high braking indices of magnetars SGR 0501+4516 and 1E 2259+586 using the double magnetic-dipole model
Yan, Fang-Zhou1,2,3; Gao, Zhi-Fu1; Yang, Wen-Shen4; Dong, Ai-Jun4
2021-01-28
Source PublicationASTRONOMISCHE NACHRICHTEN
ISSN0004-6337
Volume342Issue:1-2Pages:7
Contribution Rank1
AbstractIn this paper, we attribute high braking indices n > 3 of two magnetars SGR 0501+4516 and 1E 2259+586 to the decrease in their inclination angles using the double magnetic-dipole model proposed by Hamil et al. (2016). In this model, there are two magnetic moments inside a neutron star-one is generated by the rotation effect of a charged sphere, M-1, and the other is generated by the magnetization of ferromagnetically ordered material, M-2. Our calculations indicate that the magnetic moment M-2 would evolve toward alignment with the spin axis of the two magnetars and cause their magnetic inclination angles to decrease. We also define a ratio eta = M-2/M-1, which reflects the magnetization degree, and find that the values of eta of the two magnetars are about two orders of magnitude higher than that of rotationally powered pulsar PSR J1640-4631 with n = 3.15(3), assuming that they have the same rate of decrease in their inclination angles.
Correspondent Emailzhifugao@xao.ac.cn
Keyword1E 2259+586 double magnetic-dipole model magnetar braking index SGR 0501+4516
DOI10.1002/asna.202113913
Indexed BySCI
Language英语
Funding ProjectDoctor Starting Up Foundation of Guizhou Normal University[0516134] ; Foundation of Guizhou Provincial Education Department[(2020)003] ; Outstanding Postdoctoral Foundation of XinJiang ; Foundation of Science and Technology of Guizhou Province[(2017) 5726-37] ; Foundation of Science and Technology of Guizhou Province[[2016]4008] ; Foundation of Science and Technology of Guizhou Province[[2017]7349] ; Foundation of Science and Technology of Guizhou Province[[2019]1241] ; NSFC[U1731238] ; NSFC[U1831120] ; NSFC[11573009] ; National Key Research and Development Program of China[2018YFA0404602] ; National Natural Science Foundation of China[U1831120] ; National Natural Science Foundation of China[12041304] ; Science and Technology Foundation of Guizhou province[[2019]1241] ; Excellent Postdoctoral Foundation of XinJiang
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000612519900001
PublisherWILEY-V C H VERLAG GMBH
Funding OrganizationDoctor Starting Up Foundation of Guizhou Normal University ; Foundation of Guizhou Provincial Education Department ; Outstanding Postdoctoral Foundation of XinJiang ; Foundation of Science and Technology of Guizhou Province ; NSFC ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou province ; Excellent Postdoctoral Foundation of XinJiang
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/3848
Collection射电天文研究室_脉冲星研究团组
Corresponding AuthorGao, Zhi-Fu
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, Nanjing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang, 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
Yan, Fang-Zhou,Gao, Zhi-Fu,Yang, Wen-Shen,et al. Explaining high braking indices of magnetars SGR 0501+4516 and 1E 2259+586 using the double magnetic-dipole model[J]. ASTRONOMISCHE NACHRICHTEN,2021,342(1-2):7.
APA Yan, Fang-Zhou,Gao, Zhi-Fu,Yang, Wen-Shen,&Dong, Ai-Jun.(2021).Explaining high braking indices of magnetars SGR 0501+4516 and 1E 2259+586 using the double magnetic-dipole model.ASTRONOMISCHE NACHRICHTEN,342(1-2),7.
MLA Yan, Fang-Zhou,et al."Explaining high braking indices of magnetars SGR 0501+4516 and 1E 2259+586 using the double magnetic-dipole model".ASTRONOMISCHE NACHRICHTEN 342.1-2(2021):7.
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