General Relativistic Effects on Multipole Magnetic Field Evolution in Neutron Stars: Implications for High-Braking-Index Magnetars
文献类型：期刊论文
| 作者 | Gao, Zhifu1,2; Sun, Sheng-Nan1; Ma, Wen-Qi1,2; Shan, Hao1,2 |
| 刊名 | ASTRONOMISCHE NACHRICHTEN
 |
| 出版日期 | 2025-07-14 |
| 页码 | e70032 |
| 关键词 | braking index general relativity magnetars magnetic field evolution multipole fields |
| ISSN号 | 0004-6337 |
| DOI | 10.1002/asna.70032 |
| 产权排序 | 1 |
| 英文摘要 | Neutron stars, particularly magnetars, exhibit extreme physical conditions with some of the strongest magnetic fields in the universe. Understanding the evolution of these magnetic fields is crucial for interpreting their observed properties, such as high braking indices and X-ray emissions. In this work, we investigate the decay of multipole magnetic fields in neutron stars by incorporating general relativistic (GR) effects into the induction equations. We derive GR-corrected evolution equations for dipole (l=1$$ l=1 $$), quadrupole (l=2$$ l=2 $$), and octupole (l=3$$ l=3 $$) fields, considering both toroidal and poloidal components. Our calculations show that GR effects significantly extend the magnetic field decay timescales, with the redshift factor z approximate to 0.23$$ z\approx 0.23 $$ for a typical neutron star. We find that the GR-corrected decay timescales better align with observed characteristics of magnetars. Additionally, we discuss the implications of our model for X-ray emissions and magnetic energy release rates in magnetars. Our results highlight the importance of GR corrections for accurate predictions of magnetic field evolution and related observational phenomena. |
| WOS关键词 | EMISSION |
| 资助项目 | National Natural Science Foundation of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01B218] ; [12288102] ; [12373114] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001528677200001 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 资助机构 | National Natural Science Foundation of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7947]  |
| 专题 | 脉冲星研究团组 |
| 通讯作者 | Gao, Zhifu |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Xinjiang, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Zhifu,Sun, Sheng-Nan,Ma, Wen-Qi,et al. General Relativistic Effects on Multipole Magnetic Field Evolution in Neutron Stars: Implications for High-Braking-Index Magnetars[J]. ASTRONOMISCHE NACHRICHTEN,2025:e70032. |
| APA | Gao, Zhifu,Sun, Sheng-Nan,Ma, Wen-Qi,&Shan, Hao.(2025).General Relativistic Effects on Multipole Magnetic Field Evolution in Neutron Stars: Implications for High-Braking-Index Magnetars.ASTRONOMISCHE NACHRICHTEN,e70032. |
| MLA | Gao, Zhifu,et al."General Relativistic Effects on Multipole Magnetic Field Evolution in Neutron Stars: Implications for High-Braking-Index Magnetars".ASTRONOMISCHE NACHRICHTEN (2025):e70032. |
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来源：新疆天文台
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