论文标题
无线电宽带Arecibo源的脉冲星发射光束几何形状
Pulsar Emission Beam Geometry of Radio Broadband Arecibo Sources
论文作者
论文摘要
我们提出了无线电脉冲星的发射光束分析和模型，其主要目的是在可合理地获得的最广泛的无线电频段上检查脉冲束束的几何形状和物理。我们考虑了一组属于Arecibo Sky内的知识良好的脉冲星。这些脉冲星在可检测到发射的频率范围内脱颖而出，并且在高达4.5 GHz且低于100 MHz以下的频率上已广泛观察到。我们利用已发布的轮廓来使用核心/双锥发射光束模型作为我们的分类框架来量化这些脉冲星的频率演变的更完整图片。对于低频观察，我们考虑了测得的散射时间尺度，以推断脉冲曲线的固有与散射宽度。最后，我们讨论了有关内在参数的核心/圆锥类别概况的人口趋势。 We demonstrate that for this sub-population of pulsars, core and conal dominated profiles cluster together into two roughly segregated $P$-$\dot{P}$ populations, lending credence to the proposal that an evolution in the pair-formation geometries is responsible for core/conal emission and other emission effects such as nulling and mode-changing.
We present radio pulsar emission beam analyses and models with the primary intent of examining pulsar beam geometry and physics over the broadest band of radio frequencies reasonably obtainable. We consider a set of well-studied pulsars that lie within the Arecibo sky. These pulsars stand out for the broad frequency range over which emission is detectable, and have been extensively observed at frequencies up to 4.5 GHz and down to below 100 MHz. We utilize published profiles to quantify a more complete picture of the frequency evolution of these pulsars using the core/double-cone emission beam model as our classification framework. For the low-frequency observations, we take into account measured scattering time-scales to infer intrinsic vs scatter broadening of the pulse profile. Lastly, we discuss the populational trends of the core/conal class profiles with respect to intrinsic parameters. We demonstrate that for this sub-population of pulsars, core and conal dominated profiles cluster together into two roughly segregated $P$-$\dot{P}$ populations, lending credence to the proposal that an evolution in the pair-formation geometries is responsible for core/conal emission and other emission effects such as nulling and mode-changing.
