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

doi:10.1002/asna.202113913

CORC > 新疆天文台 > 研究单元未命名 > 射电天文研究室 > 脉冲星研究团组

	Explaining high braking indices of magnetars SGR 0501+4516 and 1E 2259+586 using the double magnetic-dipole model
	Yan, Fang-Zhou 1,2,3; Gao, Zhi-Fu 2; Yang, Wen-Shen 4; Dong, Ai-Jun 4
刊名	ASTRONOMISCHE NACHRICHTEN
	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
DOI	10.1002/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
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000612519900001
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
内容类型	期刊论文
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.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, 150,Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing, 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.