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arXiv 0806.0554astro-ph
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射电望远镜中的高度相关极化

Altitude-dependent polarization in radio pulsars

J. Dyks

摘要:

由于共转,脉冲星的偏振角(PA)曲线在脉冲相位上滞后于强度剖面4 r/Rlcrad。我提出了一个简单而简短的推导这个延迟半径的关系,以表明它不是由像差(理解为正常的光束效应),但纯粹是由贡献的共转的电子加速在观察者的框架。可用的PA曲线的高度依赖公式表示通过观测值和发射高度,使他们立即准备使用无线电数据建模。高度相关的PA曲线的解析近似进行了比较与精确的数值结果,以显示它们如何执行在大的排放高度。本文还讨论了B_(1929 +10)和B_(0950 +08)的基座发射所表现出的PA曲线反向移动的几种可能的解释。

英文摘要:

Because of the corotation, the polarization angle (PA) curve of a pulsar lags the intensity profile by 4r/Rlc rad in pulse phase. I present a simple and short derivation of this delay-radius relation to show that it is not caused by the aberration (understood as the normal beaming effect) but purely by contribution of corotation to the electron acceleration in the observer's frame. Available altitude-dependent formulae for the PA curve are expressed through observables and emission altitude to make them immediately ready to use in radio data modelling. The analytical approximations for the altitude-dependent PA curve are compared with exact numerical results to show how they perform at large emission altitudes. I also discuss several possible explanations for the opposite-than-normal shift of PA curve, exhibited by the pedestal emission of B1929+10 and B0950+08.

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。

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