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Explaining high braking indices of magnetars SGR 0501+4516 and 1E 2259+586 using the double magnetic-dipole model

文献类型：期刊论文

作者Yan, Fang-Zhou1,2,3; Gao, Zhi-Fu1; Yang, Wen-Shen4; Dong, Ai-Jun4
刊名ASTRONOMISCHE NACHRICHTEN
出版日期2021-01-28
卷号342期号:1-2页码:7
关键词1E 2259+586 double magnetic-dipole model magnetar braking index SGR 0501+4516
ISSN号0004-6337
DOI10.1002/asna.202113913
产权排序1
英文摘要In 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.
资助项目Doctor 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研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000612519900001
出版者WILEY-V C H VERLAG GMBH
资助机构Doctor 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
源URL[http://ir.xao.ac.cn/handle/45760611-7/3847]  
专题脉冲星研究团组
通讯作者Gao, Zhi-Fu
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, 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
推荐引用方式
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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