Frequency dependence of pulsar profiles
Frequency dependence of pulsar profiles
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DOI：
10.1086/164807
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发表时间：
1986-12
期刊：
影响因子：
--
通讯作者：
T. Hankins;B. Rickett
中科院分区：
文献类型：
--
作者：
T. Hankins;B. Rickett
在135-2380 MHz频率范围内，计算了具有复杂脉冲形状的12颗脉冲星的平均强度分布。轮廓形状显示出明显的频率依赖性；尽管大多数轮廓被选择为在400 MHz附近具有三个或更多分量，但在较低频率下，其中几个轮廓看起来是具有一个分量的简单轮廓。大多数剖面符合Rankin的核心-锥形分量分类，其中频率相关的剖面由具有比锥形分量更陡峭的频谱的核心分量来解释。但也有一些令人困惑的例外。其中许多脉冲星的一个共同特征是在低频存在一个拖尾分量，它在高频下不能发展成一个强大的锥形分量，而是在尾缘成指数衰减。参考文献31篇。
The average intensity profiles of 12 pulsars with complex pulse shapes were calculated for up to 11 frequencies in the 135-2380 MHz range. The profile shapes show a clear frequency dependence; although most of the profiles were chosen to have three or more components near 400 MHz, at lower frequencies several of them appear as simple profiles with one component. Most of the profiles fit into Rankin's core-conal component classification where frequency dependent profiles are explained by core components having a steeper spectrum than conal components. There are some perplexing exceptions. A feature common to many of these pulsars is the presence of a trailing component at low frequency which fails to develop into a strong conal component at high frequencies but instead becomes an exponential decay at the trailing edge. 31 references.