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Magnetic field decay of magnetars in supernova remnants
Gao, Z. F.1,2,3; Peng, Q. H.4; Wang, N.1,2; Yuan, J. P.1,2; Gao,ZF
2012-11-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume342Issue:1Pages:55-71
AbstractIn this paper, we modify our previous research carefully, and derive a new expression of electron energy density in superhigh magnetic fields. Based on our improved model, we re-compute the electron capture rates and the magnetic fields' evolutionary timescales t of magnetars. According to the calculated results, the superhigh magnetic fields may evolve on timescales similar to(10(6)-10(7)) yrs for common magnetars, and the maximum timescale of the field decay, ta parts per thousand 2.9507x10(6) yrs, corresponding to an initial internal magnetic field B (0)=3.0x10(15) G and an initial inner temperature T (0)=2.6x10(8) K. Motivated by the results of the neutron star-supernova remnant (SNR) association of Zhang and Xie (2011), we calculate the maximum B (0) of magnetar progenitors, B (max)similar to(2.0x10(14)-2.93x10(15)) G when T (0)=2.6x10(8) K. When T (0)similar to 2.75x10(8)-1.75x10(8) K, the maximum B (0) will also be in the range of similar to 10(14)-10(15) G, not exceeding the upper limit of magnetic field of a magnetar under our magnetar model. We also investigate the relationship between the spin-down ages of magnetars and the ages of their SNRs, and explain why all AXPs associated with SNRs look older than their real ages, whereas all SGRs associated with SNRs appear younger than they are.
KeywordMagnetar Electron Capture Rate Supernova Remnant Superhigh Magnetic Field
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10509-012-1139-x
WOS KeywordGAMMA-RAY REPEATERS ; X-RAY ; NEUTRON-STARS ; SPIN-DOWN ; SGR 1900+14 ; PULSAR SPIN ; EMISSION MODELS ; BRAKING INDEXES ; YOUNG PULSARS ; RADIO PULSARS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000309338600007
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10100
Collection期刊(老文献)
Corresponding AuthorGao,ZF
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi Xinjiang 830011, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
4.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Gao, Z. F.,Peng, Q. H.,Wang, N.,et al. Magnetic field decay of magnetars in supernova remnants[J]. ASTROPHYSICS AND SPACE SCIENCE,2012,342(1):55-71.
APA Gao, Z. F.,Peng, Q. H.,Wang, N.,Yuan, J. P.,&Gao,ZF.(2012).Magnetic field decay of magnetars in supernova remnants.ASTROPHYSICS AND SPACE SCIENCE,342(1),55-71.
MLA Gao, Z. F.,et al."Magnetic field decay of magnetars in supernova remnants".ASTROPHYSICS AND SPACE SCIENCE 342.1(2012):55-71.
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