论文标题
使用图理论可视化脉冲星人群
Visualizing the pulsar population using graph theory
论文作者
论文摘要
$ p \ dot p $图是Pulsar Research的基石。它以多种方式用于对人口进行分类,了解进化轨道,识别我们的理论覆盖范围等问题。但是,我们一直在研究同一情节已有五十年了。新的评估可能是健康的。 $ p \ dot p $ -diagram是可视化我们知道的脉冲星的最有用或最完整的方法吗?在这里,我们仔细研究了我们有关脉冲星人口的信息。首先,我们使用主成分分析对大小的分析,具体取决于固有的PULSAR的时序特性(相关的物理脉冲星特征代理),以分析Pulsar时期和周期衍生物所包含的信息是否足以描述脉冲星人群的多样性。即使感兴趣的变量取决于$ p $和$ \ dot p $,我们也表明$ p \ dot p $不是主要组件。因此,仅基于$ p $和$ \ dot p $的任何距离排名或可视化都可能具有误导性。接下来,我们定义并计算正确的归一化距离,以测量脉冲星的接近度,计算人口的最小生成树,并讨论可能的应用。 Pulsar树托管有关PULSAR相似性的信息,这些信息超出了$ p $和$ \ dot p $,因此自然很难从$ p \ dot p $ -diagram中读取。我们使用这项工作介绍Pulsar树网站http://www.pulsartree.ice.csic.es,其中包含可视化工具和数据,以允许用户根据MST和距离排名收集信息。
The $P\dot P$ diagram is a cornerstone of pulsar research. It is used in multiple ways for classifying the population, understanding evolutionary tracks, identifying issues in our theoretical reach, and more. However, we have been looking at the same plot for more than five decades. A fresh appraisal may be healthy. Is the $P\dot P$-diagram the most useful or complete way to visualize the pulsars we know? Here we pose a fresh look at the information we have on the pulsar population. First, we use principal components analysis over magnitudes depending on the intrinsic pulsar's timing properties (proxies to relevant physical pulsar features), to analyze whether the information contained by the pulsar's period and period derivative is enough to describe the variety of the pulsar population. Even when the variables of interest depend on $P$ and $\dot P$, we show that $P\dot P$ are not principal components. Thus, any distance ranking or visualization based only on $P$ and $\dot P$ is potentially misleading. Next, we define and compute a properly normalized distance to measure pulsar nearness, calculate the minimum spanning tree of the population, and discuss possible applications. The pulsar tree hosts information about pulsar similarities that go beyond $P$ and $\dot P$, and are thus naturally difficult to read from the $P\dot P$-diagram. We use this work to introduce the pulsar tree website http://www.pulsartree.ice.csic.es containing visualization tools and data to allow users to gather information in terms of MST and distance ranking.