A Possible Mechanism for the Origin of Ultrastrong Magnetic Field of Magnetars

Growing observations reveal that soft gamma-ray repeaters and anomalous x-ray pulsars are magnetars. Their magnetic fields may achieve 1014-1015 G. We explore the origin of the superstrong magnetic field by considering the magnetization of the 3P2 superfluid neutrons inside neutron stars (NSs). By s...

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Bibliographic Details
Published in:Chinese physics letters 2006-04, Vol.23 (4), p.1057-1060, Article 1057
Main Authors: Hua, Bai, Qiu-He, Peng, Xin-Lian, Luo
Format: Article
Language:English
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Summary:Growing observations reveal that soft gamma-ray repeaters and anomalous x-ray pulsars are magnetars. Their magnetic fields may achieve 1014-1015 G. We explore the origin of the superstrong magnetic field by considering the magnetization of the 3P2 superfluid neutrons inside neutron stars (NSs). By solving the Tolman-Oppenheimer-Volkov equations together with the equation of state adopted by Elgaroy et al. [Phys. Rev. Lett. 77 (1996) 1428] in the calculation of the neutron pairing gap, we specifically calculate the NS internal structure, the permissible region for 3P2 superfluid neutrons inside the NS, and the total magnetic moment contributed by the orderly arranged neutron vortexes. The result shows that the induced magnetic field may cover a wide range, which is consistent with the magnetic field predicted by the standard magnetic dipole radiation for pulsar spindown.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/23/4/082