标题： 磁星是AXP/SGR吗？ 显示英文标题

标题： Are AXPs/SGRs magnetars?

摘要： 异常X射线脉冲星和软伽马射线重复源通常被认为是具有超强磁场的中子星，即“磁星”。 “磁星”表现出X射线波段的光度大于旋转能量损失率，即$L_{X}>\dot {E}_{\rm rot}$，然后辐射能量来自磁场能量。 这里认为磁星可能并不存在。 一些X射线和射电观测结果与磁星模型相矛盾。 (1) PSR J1852+0040的X射线光度远大于旋转能量损失率（$L_{X}/\dot {E}_{\rm rot}\simeq 18)$），但磁场仅为$3.1\times 10^{11}$ G。这个X射线辐射能量是否来自磁场？ (2) 与上述相反，射电脉冲星J1847-0130和PSR J1718-3718的磁场比AXP 1E 2259+586的磁场还要高，为什么这两个射电脉冲星的辐射能量仍然来自旋转能量？ 此外，新发现的具有最低磁场的SGR 0418+5729的磁场为3.0 e13 G，低于临界磁场$B_{\rm C}=4.414$e13 G（Esposito等，2010）。 (3) 一些“磁星”也会发射正常的瞬时射电信号，射电脉冲星与“磁星”的本质区别是什么？ 我们将首先呈现观测事实的论证，然后讨论在什么情况下传统获取磁场的方法可能是不正确的。 显示英文摘要

摘要： Anomalous X-ray Pulsars and Soft Gamma-Ray Repeaters have been generally recognized as neutron stars with super strong magnetic fields, namely "magnetars". The "magnetars" manifest that the luminosity in X-ray band are larger than the rotational energy loss rate, i.e. $L_{X}>\dot {E}_{\rm rot}$, and then the radiation energy is coming from the energy of magnetic field. Here it is argued that magnetars may not really exist. Some X-ray and radio observational results are contradicted with the magnetar model. (1) The X-ray luminosity of PSR J1852+0040 is much larger than the rotational energy loss rate ($L_{X}/\dot {E}_{\rm rot}\simeq 18)$, but the magnetic field is just $3.1\times 10^{11}$ G. Does this X-ray radiation energy come from the magnetic field? (2) In contrast to the above, the magnetic fields of radio pulsars J1847-0130 and PSR J1718-3718 are higher than that of AXP 1E 2259+586, why is the radiation energy of those two radio pulsars still coming from rotational energy? Furthermore, the magnetic field of the newly discovered SGR 0418+5729 with the lowest magnetic field is 3.0 e13 G, lower than the critical magnetic field $B_{\rm C}=4.414$ e13 G) (Esposito et al. 2010). (3) Some "magnetars" also emit normal transient radio pulses, what is the essential difference between radio pulsars and the "magnetars"? The observational fact arguments will be presented at first, then we discuss in what situation the conventional method to obtain magnetic field could not be correct.