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A possible mechanism for magnetar soft X-ray/gamma-ray emission
Gao Zhi-Fu2,3,4; Peng Qiu-He1; Wang Na2,3; Chou Chih-Kang5
Source PublicationCHINESE PHYSICS B
Contribution Rank2

Once the energies of electrons near the Fermi surface obviously exceed the threshold energy of the inverse beta decay, electron capture (EC) dominates inside the magnetar. Since the maximal binding energy of the P-3(2) neutron Cooper pair is only about 0.048 MeV, the outgoing high-energy neutrons (E-k(n) > 60 MeV) created by the EC can easily destroy the P-3(2) neutron Cooper pairs through the interaction of nuclear force. In the anisotropic neutron superfluid, each P-3(2) neutron Cooper pair has magnetic energy 2 mu B-n in the applied magnetic field B, where mu(n) = 0.966 x 10(-23) erg(.)G(-1) is the absolute value of the neutron abnormal magnetic moment. While being destroyed by the high-energy EC neutrons, the magnetic moments of the P-3(2) Cooper pairs are no longer arranged in the paramagnetic direction, and the magnetic energy is released. This released energy can be transformed into thermal energy. Only a small fraction of the generated thermal energy is transported from the interior to the surface by conduction, and then it is radiated in the form of thermal photons from the surface. After highly efficient modulation within the star's magnetosphere, the thermal surface emission is shaped into a spectrum of soft X-ray/gamma-rays with the observed characteristics of magnetars. By introducing related parameters, we calculate the theoretical luminosities of magnetars. The calculation results agree well with the observed parameters of magnetars.

KeywordLandau Levels Fermi Surface Thermal Radiation Heat Conduction
Subject Area致密天体、高能和基础物理
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS KeywordResonant Cyclotron Scattering ; Neutron-star Matter ; Gamma-repeaters ; Pulsar Xte-j1810-197 ; Light-curve ; Spin-down ; Evolution ; Fields ; Magnetospheres ; Superfluidity
Funding Project脉冲星研究团组
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000303999000082
Funding OrganizationNational Natural Science Foundation of China(Grant No.10773005) ; the National Basic Research Program of China(Grant No.2009CB824800) ; the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant No.KJCX 2 -YW-T09) ; the Key Directional Project of
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Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorPeng Qiu-He
Affiliation1.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gao Zhi-Fu,Peng Qiu-He,Wang Na,et al. A possible mechanism for magnetar soft X-ray/gamma-ray emission[J]. CHINESE PHYSICS B,2012,21(5):57109.
APA Gao Zhi-Fu,Peng Qiu-He,Wang Na,&Chou Chih-Kang.(2012).A possible mechanism for magnetar soft X-ray/gamma-ray emission.CHINESE PHYSICS B,21(5),57109.
MLA Gao Zhi-Fu,et al."A possible mechanism for magnetar soft X-ray/gamma-ray emission".CHINESE PHYSICS B 21.5(2012):57109.
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