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arXiv 1107.1189astro-ph.HE
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用ZHAireS蒙特卡罗模拟大气簇射中的射电脉冲

Monte Carlo simulations of radio pulses in atmospheric showers using ZHAireS

Jaime Alvarez-Muñiz, Washington R. Carvalho, Enrique Zas

摘要:

我们提出了预测的无线电脉冲发射的广泛的空气阵雨使用ZHAireS,AIRES为基础的蒙特卡罗代码,考虑到超高能宇宙射线诱导的簇射发展在大气中的全部复杂性,并允许在时域和频域的电场的计算。我们不预设任何发射机制,但我们的结果是兼容的地磁和电荷过剩的无线电发射效应的叠加。我们研究了电场的极化以及折射率n和簇射几何对射电脉冲的影响。我们表明,几何形状,再加上相对论效应时,出现使用一个现实的n>1,发挥了突出的作用,无线电发射的空气淋浴。

英文摘要:

We present predictions for the radio pulses emitted by extensive air showers using ZHAireS, an AIRES-based Monte Carlo code that takes into account the full complexity of ultra-high energy cosmic-ray induced shower development in the atmosphere, and allows the calculation of the electric field in both the time and frequency domains. We do not presuppose any emission mechanism, but our results are compatible with a superposition of geomagnetic and charge excess radio emission effects. We investigate the polarization of the electric field as well as the effects of the refractive index n and shower geometry on the radio pulses. We show that geometry, coupled to the relativistic effects that appear when using a realistic n>1, play a prominent role on the radio emission of air showers.

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