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Braking index of PSR J1846-0258: a model of magnetic inclination evolution and its gravitational-wave implication

文献类型：期刊论文

作者Li, Biao-Peng1,2,3; Gao, Zhi-Fu1,2; Ma, Wen-Qi1,2,3; Cheng, Quan4
刊名FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
出版日期2025-07-09
卷号12页码:1625459
关键词neutron stars magnetic inclination angle magnetic field magnetars braking index
ISSN号2296-987X
DOI10.3389/fspas.2025.1625459
产权排序1
英文摘要We explain the braking index n=2.19 +/- 0.03 of PSR J1846-0258 by incorporating the time evolution of its magnetic inclination angle and dipolar magnetic field. Based on observational timing data and the age of the associated supernova remnant (t(SNR)approximate to 1.77kyr), we estimate a magnetic inclination change rate of chi approximate to 0.281 degrees/100yrs, comparable to that of the Crab pulsar. Applying the two-dipole model to PSR J1846-0258, we find an internal dipole moment ratio eta=M-2/M-1 similar to 10(26)-10(27). For magnetic field decay timescales tau D<3.6x10(5) yrs, the magnetic energy dissipation rate (E-mag similar to(10(33)-10(34))erg/s) partially explains the observed X-ray luminosity LX similar to 1.9x10(34)erg/s, while longer tau D requires additional energy sources. The derived gravitational wave strain (h(0)similar to 10(-29)) remains undetectable with current instruments but constrains internal magnetic field geometries. This work highlights the critical role of magnetic inclination dynamics in pulsar spin-down behavior and offers a physically motivated framework that can be extended to other young neutron stars with measured magnetic inclination and braking indices.
WOS关键词YOUNG PULSAR ; CRAB PULSAR ; EMISSION ; J1833-1034 ; GLITCHES ; KES-75
资助项目National Key Research and Development Program of China[2022YFC2205202] ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region[2022A03013-1] ; National Natural Science Foundation of China[12041304] ; National Natural Science Foundation of China[12288102] ; National Natural Science Foundation of China[12373114] ; National Natural Science Foundation of China[12003009] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region, China[2022D01A155] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region, China[2023TSYCTD0013]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001533756300001
出版者FRONTIERS MEDIA SA
资助机构National Key Research and Development Program of China ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region ; National Natural Science Foundation of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region, China
源URL[http://ir.xao.ac.cn/handle/45760611-7/7962]  
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, Urumqi, Xinjiang, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China
3.Xinjiang Key Lab Radio Astrophys, Urumqi, Peoples R China
4.Cent China Normal Univ, Inst Astrophys, Wuhan, Peoples R China
推荐引用方式
GB/T 7714		 Li, Biao-Peng,Gao, Zhi-Fu,Ma, Wen-Qi,et al. Braking index of PSR J1846-0258: a model of magnetic inclination evolution and its gravitational-wave implication[J]. FRONTIERS IN ASTRONOMY AND SPACE SCIENCES,2025,12:1625459.
APA Li, Biao-Peng,Gao, Zhi-Fu,Ma, Wen-Qi,&Cheng, Quan.(2025).Braking index of PSR J1846-0258: a model of magnetic inclination evolution and its gravitational-wave implication.FRONTIERS IN ASTRONOMY AND SPACE SCIENCES,12,1625459.
MLA Li, Biao-Peng,et al."Braking index of PSR J1846-0258: a model of magnetic inclination evolution and its gravitational-wave implication".FRONTIERS IN ASTRONOMY AND SPACE SCIENCES 12(2025):1625459.

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