Accreting magnetars: linking ultraluminous X-ray pulsars and the slow pulsation X-ray pulsars

Accreting magnetars: linking ultraluminous X-ray pulsars and the slow pulsation X-ray pulsars
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吸积磁星:连接超光X射线脉冲星和慢脉动X射线脉冲星

DOI:
10.1093/mnras/sty2989
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发表时间:
2018-06
影响因子:
4.8
通讯作者:
Wang W.
Wang W.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Tong H.;Wang W.

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讨论了吸积磁星的可能表现形式。结果表明,这四颗超发光X射线脉冲星可以在吸积低磁场磁星的情况下被理解。NGC300 ULX1脉冲星可能比其他来源具有更高的偶极磁场。对它们质量吸积率的普遍限制证实了它们的超级爱丁顿性质。得到了它们的束流因子的下限。他们似乎没有很强的光芒。ULX突发状态的占空比也可以受到它们的定时观测的限制。从长远来看,ULX脉冲星可能处于吸积平衡状态。在爆发期间,它们会自转,并从以前的平衡状态运行到新的平衡状态。提出最慢的脉冲X射线脉冲星AX J1910.7+0917可能是一颗低质量吸积率的吸积磁星。ULX脉冲星、慢脉动X射线脉冲星都可能是吸积磁星,但吸积率不同。总结了吸积磁星的七个可能的特征。
Possible manifestations of accreting magnetars are discussed. It is shown that the four ultra-luminous X-ray pulsars can be understood in the accreting low magnetic field magnetar scenario. The NGC300 ULX1 pulsar may have a higher dipole magnetic field than other sources. General constraint on their mass accretion rate confirmed their super-Eddington nature. Lower limits on their beaming factor are obtained. They do not seem to have strong beaming. The duty cycle of the ULX burst state can also be constrained by their timing observations. ULX pulsars may be in accretion equilibrium in the long run. During the outburst, they will spin up, and run from the previous equilibrium state to the new equilibrium state. It is proposed that the slowest puslation X-ray pulsar AX J1910.7+0917 may be an accreting magnetar with a low mass accretion rate. ULX pulsars, slow pulsation X-ray pulsars may all be accreting magnetars with different accretion rates. Seven possible signatures of an accreting magnetar are summarized.
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