论文标题
年轻，高能脉冲星的银河系种群和特性
The Galactic population and properties of young, highly-energetic pulsars
论文作者
论文摘要
具有旋转能量EDOT> 10^35 erg/s的年轻，非重生脉冲星的种群主要在伽马射线和无线电波长下进行采样。总共已知137个这样的脉冲星，在无线电和伽马射线中可检测到的来源之间有部分重叠。我们使用一组非常小的假设来试图测试是否可以通过单个潜在的中子星人群来解释观察到的脉冲星样品。对于无线电发射，我们假设在所有自旋期间固定发射高度为300〜km的规范圆锥形，而依赖EDOT^{0.25}的光度定律。对于伽马射线发射，我们假设依赖于edot^{0.5}的外部差距模型和光度定律。我们综合了一群快速旋转的脉冲星，其出生率为每100年。我们发现，这个简单的模型可以重现带有两个警告的观察到人群的大多数特征。第一个是由于难以在没有无线电频率的事先知识的情况下找到γ-射线脉冲星的困难，因此我们猜测在最高的EDOT处的伽马射线脉冲星的缺陷是一种观察性选择效应。第二个是无线电脉冲星的缺陷，插孔发射可能与无线电发射物理学有关。我们讨论这些发现的含义。
The population of young, non-recycled pulsars with spin down energies Edot >10^35 erg/s is sampled predominantly at gamma-ray and radio wavelengths. A total of 137 such pulsars are known, with partial overlap between the sources detectable in radio and gamma-rays. We use a very small set of assumptions in an attempt to test whether the observed pulsar sample can be explained by a single underlying population of neutron stars. For radio emission we assume a canonical conal beam with a fixed emission height of 300~km across all spin periods and a luminosity law which depends on Edot^{0.25}. For gamma-ray emission we assume the outer-gap model and a luminosity law which depends on Edot^{0.5}. We synthesise a population of fast-spinning pulsars with a birth rate of one per 100 years. We find that this simple model can reproduce most characteristics of the observed population with two caveats. The first is a deficit of gamma-ray pulsars at the highest Edot which we surmise to be an observational selection effect due to the difficulties of finding gamma-ray pulsars in the presence of glitches without prior knowledge from radio frequencies. The second is a deficit of radio pulsars with interpulse emission, which may be related to radio emission physics. We discuss the implications of these findings.
