Investigating magnetically-induced distortions of neutron stars through gamma-ray burst X-ray plateaus
| Autor: | Lin, Tingting, Du, Shuang, Wang, Weihua, Hou, Shujin, Xu, Renxin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | A&A 666, A138 (2022) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1051/0004-6361/202244174 |
| Popis: | Magnetic field may distort neutron stars (NSs), but its effect has not been robustly tested through gravitational-wave observation yet due to the absence of a fast rotating Galactic magnetar. Part of gamma-ray bursts (GRBs) are potential to investigate the magnetically-induced distortion since their central objects may be millisecond magnetars. In this paper, we propose a method to estimate the distortions of these possible magnetars under GRB magnetar scenario. According to the case study of GRB 070521, we find a relation between the effective magnetically-induced ellipticity, $\epsilon_{\rm B,eff}$, and the effective dipole magnetic field strength on NS surfaces, $B_{\rm eff}$, namely $\epsilon_{\rm B,eff}\sim 10^{-3}(B_{\rm eff}/10^{15}\rm G)^{2}$. Furthermore, we constrain the internal magnetic-field structure of the magnetar to be $B_{\rm eff}\sim 0.02 Comment: 6 pages, 4 figures, A&A accepted |
| Databáze: | arXiv |
| Externí odkaz: |
|