arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.3539astro-ph.HE
收藏

费米时代射电脉冲星的布居合成

Population Synthesis of Radio Pulsars in the Fermi Era

Peter L. Gonthier, Erin Nagelkirk, Melanie Stam, Alice K. Harding

摘要:

我们目前的结果,我们的脉冲星人口合成正常的星系盘使用我们以前开发的蒙特卡罗代码。从我们的研究观察到的无线电射电望远镜,具有清晰可辨的核心和锥组件,在其中,我们适合的偏振扫描以及脉冲轮廓,以约束观看的几何形状,我们开发了一个模型,描述的光度和比率的无线电核心锥峰值通量。在这个模型中,短周期的类星体是锥占优的。我们探讨了中子星演化的模型有和没有磁场衰减,并与不同的初始周期分布。我们目前的初步结果,包括模拟人口统计与观测到的射电脉冲星人口进行比较。演化的中子星人口从这个模拟结果可以用来模拟伽玛射线散射的分布,比较费米结果。

英文摘要:

We present results of our pulsar population synthesis of normal pulsars from the Galactic disk using our previously developed Monte-Carlo code. From our studies of observed radio pulsars that have clearly identifiable core and cone components, in which we fit the polarization sweep as well as the pulse profiles in order to constrain the viewing geometry, we develop a model describing the luminosity and ratio of radio core-to-cone peak fluxes. In this model, short period pulsars are more cone-dominated. We explore models of neutron star evolution with and without magnetic field decay, and with different initial period distributions. We present preliminary results including simulated population statistics that are compared with the observed radio pulsar population. The evolved neutron star populations resulting from this simulation can be used to model distributions of gamma-ray pulsars for comparison to Fermi results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑