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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; Peng,QH
2012-05-01
Source PublicationCHINESE PHYSICS B
ISSN1674-1056
Volume21Issue:5
AbstractOnce 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
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1674-1056/21/5/057109
WOS KeywordRESONANT CYCLOTRON SCATTERING ; NEUTRON-STAR MATTER ; GAMMA-REPEATERS ; PULSAR XTE-J1810-197 ; LIGHT-CURVE ; SPIN-DOWN ; EVOLUTION ; FIELDS ; MAGNETOSPHERES ; SUPERFLUIDITY
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000303999000082
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10094
Collection期刊(老文献)
Corresponding AuthorPeng,QH
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
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).
APA Gao Zhi-Fu,Peng Qiu-He,Wang Na,Chou Chih-Kang,&Peng,QH.(2012).A possible mechanism for magnetar soft X-ray/gamma-ray emission.CHINESE PHYSICS B,21(5).
MLA Gao Zhi-Fu,et al."A possible mechanism for magnetar soft X-ray/gamma-ray emission".CHINESE PHYSICS B 21.5(2012).
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