论文标题
从更好的
Reflection Symmetry in the Folded Light Curve of the Crab Pulsar from NICER
论文作者
论文摘要
旋转动力的脉冲星螃蟹，Vela和Geminga的折叠光曲线（FLC）在$γ$ -Ray的能量下具有近似的反射对称性。在这里，通过分析使用{\ it {nicer}}天文台，以$ 1-10 $ keV获得的蟹脉冲的高分辨率flc，以软X射线能量进行了研究。比较了第二个峰的第一个峰和第二个峰值的反射版本的上升边缘，并以几种方式比较了相位范围，而两条曲线在统计上相似。当两个峰对齐时，最好的匹配发生在$ \ \ \ $ \ 0.0244 $的小相位时，就会发生。他们的平均差异为$ -0.78 \ pm 1.8 $ photons/sec，$χ^2 $ $ 0.93 $。如果第一曲线通过拉普拉斯函数进行卷积，则相应的数字为$ \约0.0274 $，平均差值为$ -1.23 \ pm 1.30 $ 1.30 $和$χ^2 $ $ 0.76 $。这些相位范围要比对反射对称性所感知的范围要小得多。因此，两个边缘可以在实质相范围内具有镜像关系的唯一方法是，如果一个人调用幅度$ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \多于100 $，大约100美元约100美元，而宽度$ \ of相位约为0.1 $，以相位$ \左右为中心。
The Rotation powered pulsars Crab, Vela and Geminga have double peaked folded light curves (FLC) at $γ$-ray energies, that have an approximate reflection symmetry. Here this aspect is studied at soft X-ray energy by analyzing a high resolution FLC of the Crab pulsar obtained at $1 - 10$ keV using the {\it{NICER}} observatory. The rising edge of the first peak of the FLC and the reflected version of the falling edge of the second peak are compared in several ways, and phase ranges are identified where the two curves are statistically similar. The best matching occurs when the two peaks are aligned, but only in a small phase range of $\approx 0.0244$ just below their peaks; their mean difference is $-0.78 \pm 1.8$ photons/sec with a reduced $χ^2$ of $0.93$. If the first curve is convolved by a Laplace function, the corresponding numbers are phase range of $\approx 0.0274$, mean difference of $-1.23 \pm 1.30$ and $χ^2$ of $0.76$. These phase ranges are much smaller than those over which the reflection symmetry has been perceived. Therefore the only way the two edges can have a mirror relation over a substantial phase range is if one invokes a broad and faint emission component of amplitude $\approx 100$ photons/sec and width $\approx 0.1$ in phase, centered at phase $\approx 0.1$ beyond the second peak.
