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Constraining Magnetar Parameters by Taking into Account the Evolutionary Effects of Radius and Moment of Inertia with Swift/XRT Data

文献类型：期刊论文

作者Lan, Lin7; Gao, He5,6; Ai, Shunke3,4; Xie, Wen-Jin7; Yuan, Yong2; Li L(李龙)1; Xin, Li-Ping7; Wei, Jian-Yan7
刊名ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期2025-09-01
卷号280期号:1页码:59
ISSN号0067-0049
DOI10.3847/1538-4365/adefe4
通讯作者Gao, He(gaohe@bnu.edu.cn)
英文摘要A newly born millisecond magnetar has been proposed as one possible central engine of some gamma-ray bursts (GRBs) with X-ray plateau emission. In this work, we systematically analyzed the Swift/X-Ray Telescope data of long GRBs with plateau emission that were detected before 2023 December, estimated the physical parameters of the magnetar by considering the R/I evolutionary effects, and investigated possible relationships among these parameters and their relation to the GRB jet and magnetar wind radiation. We found that neglecting the evolutionary effects of R/I can lead to systematic overestimation or underestimation of magnetar physical parameters such as magnetic field strength (Bp), spin period (P0), and ellipticity (& varepsilon;) from 20% to 50%. We also found that the correlations among different magnetar parameters can be approximately expressed as & varepsilon;proportional to P01.57 +/- 0.22 , & varepsilon;proportional to Bp0.97 +/- 0.13 , and Bp proportional to P01.30 +/- 0.16 for our selected equation of states (EoSs), with the 1 sigma deviation included. The correlations between the GRB jet emission and the magnetar wind emission can be approximately described as Ewind proportional to Ejet,iso0.83 +/- 0.07(Ejet0.76 +/- 0.06) , P0 proportional to Ejet,iso-0.29 +/- 0.03(Ejet-0.26 +/- 0.02) , Bp proportional to Ejet,iso-0.58 +/- 0.06(Ejet-0.55 +/- 0.05) , and & varepsilon;proportional to Ejet,iso-0.55 +/- 0.07(Ejet-0.52 +/- 0.06) for our selected EoSs. The universal correlations suggest that a nascent magnetar with the faster P0, lower Bp, as well as lower & varepsilon; are more inclined to power a more energetic GRB jet, and the ellipticity deformation and initial spin period of the newborn magnetar are likely to originate from the magnetically induced distortion mechanism and correspond to the equilibrium spin period as a result of interaction between the magnetar and its accretion disk, respectively. Finally, we found that the gravitational-wave (GW) signals from the remnants of those GW-dominated GRBs with redshift measurements cannot reach the sensitivity threshold of the current Advanced LIGO detector, and only two cases (GRB 150323A and 170607A) can reach the sensitivity threshold of the prospective ET detector. Future GW observations could not only offer the first smoking gun that a protomagnetar can serve as the central engine of GRBs but also play a crucial role in precisely constraining the neutron star EoS.
分类号一类
WOS关键词GAMMA-RAY BURSTS ; GRAVITATIONAL-WAVE EMISSION ; EARLY X-RAY ; EXTENDED EMISSION ; CENTRAL ENGINE ; NEUTRON-STARS ; FALLBACK ACCRETION ; NEWBORN MAGNETAR ; BLACK-HOLE ; COMPREHENSIVE ANALYSIS
资助项目MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[GZB20230765] ; China Postdoctoral Science Foundation[13164] ; Villum Foundation[12373040] ; Villum Foundation[12021003] ; Villum Foundation[12303050] ; Villum Foundation[12494573] ; National Natural Science Foundation of China[2022SKA0130100] ; National SKA Program of China ; Fundamental Research Funds for the Central Universities[XDB0550401] ; Strategic Priority Research Program of the Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001569035900001
资助机构MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; China Postdoctoral Science Foundation ; Villum Foundation ; National Natural Science Foundation of China ; National SKA Program of China ; Fundamental Research Funds for the Central Universities ; Strategic Priority Research Program of the Chinese Academy of Sciences
其他责任者Gao, He
源URL[http://dspace.imech.ac.cn/handle/311007/103907]  
专题力学研究所_国家微重力实验室
作者单位1.Nanchang Univ, Sch Phys & Mat Sci, Dept Phys, Nanchang 330031, Peoples R China
2.Chinese Acad Sci, Inst Mech, Ctr Gravitat Wave Expt, Natl Micrograv Lab, Beijing, Peoples R China;
3.Univ Copenhagen, Niels Bohr Inst, DARK, Blegdamsvej 17, DK-2100 Copenhagen, Denmark;
4.Univ Copenhagen, Niels Bohr Int Acad, Blegdamsvej 17, DK-2100 Copenhagen, Denmark;
5.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China;
6.Beijing Normal Univ, Inst Frontier Astron & Astrophys, Beijing 102206, Peoples R China;
7.Chinese Acad Sci, CAS Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100012, Peoples R China;
推荐引用方式
GB/T 7714		 Lan, Lin,Gao, He,Ai, Shunke,et al. Constraining Magnetar Parameters by Taking into Account the Evolutionary Effects of Radius and Moment of Inertia with Swift/XRT Data[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2025,280(1):59.
APA Lan, Lin.,Gao, He.,Ai, Shunke.,Xie, Wen-Jin.,Yuan, Yong.,...&Wei, Jian-Yan.(2025).Constraining Magnetar Parameters by Taking into Account the Evolutionary Effects of Radius and Moment of Inertia with Swift/XRT Data.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,280(1),59.
MLA Lan, Lin,et al."Constraining Magnetar Parameters by Taking into Account the Evolutionary Effects of Radius and Moment of Inertia with Swift/XRT Data".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 280.1(2025):59.

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来源：力学研究所

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