更多比满足眼睛：伪装磁星
More than meets the eye: magnetars in disguise
摘要：
最近有人提出，从磁星的无线电发射可以使用一个“基本平面”之间的参数空间脉冲星电压间隙和X射线光度Lx旋转能量损失率Edot的比率进行评估。特别地，如果Lx/Edot<1并且电压间隙大，则磁星将发生无线电发射，并且如果Lx/Edot>1则没有无线电发射。在这里，我们澄清了关于这个基本平面的几个问题，包括证明基本平面不是唯一定义的。我们还表明，如果磁星和所有其他的磁星是中子星统一图像的不同表现，那么脉冲星的射电活动（不活动）似乎是由比值Lx/Edot<1（Lx/Edot>1）决定的，尽管某些源的观测偏差和比值的不确定性仍然可能使这一结论无效。最后，我们评论使用的其他脉冲星参数，从三个观测值：自旋周期P，周期导数Pdot，和Lx。
英文摘要：
It has recently been proposed that radio emission from magnetars can be evaluated using a "fundamental plane" in parameter space between pulsar voltage gap and ratio of X-ray luminosity Lx to rotational energy loss rate Edot. In particular, radio emission from magnetars will occur if Lx/Edot<1 and the voltage gap is large, and there is no radio emission if Lx/Edot>1. Here we clarify several issues regarding this fundamental plane, including demonstrating that the fundamental plane is not uniquely defined. We also show that, if magnetars and all other pulsars are different manifestations of a unified picture of neutron stars, then pulsar radio activity (inactivity) appears to be determined by the ratio Lx/Edot<1 (Lx/Edot>1), although observational bias and uncertainty in the ratio for some sources may still invalidate this conclusion. Finally, we comment on the use of other pulsar parameters that are constructed from the three observables: spin period P, period derivative Pdot, and Lx.
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