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arXiv 1607.01645astro-ph.HE
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银河系外宇宙的核窗口

The Nuclear Window to the Extragalactic Universe

Martin Erdmann, Gero Müller, Martin Urban, Marcus Wirtz

摘要:

我们调查最近的两个参数化的银河系磁场方面的宇宙核穿越该领域的影响。我们提出了一个全面的研究的角度偏转的大小,分散的到达概率分布,在地球上的到达图像的多重性,在现场透明度的方差,和湍流场分量的影响。为了保持对弹道偏转的限制,一个能量为E、电荷为Z的宇宙核的刚性应该大于E/Z=6 EV。鉴于两个场参数化作为银河场现有知识的衡量标准所产生的差异,这一刚性阈值可能必须提高。对于E/Z>60 EV的点源搜索,场不确定性适度增加了北部和南部地区源的发现所需的信号事件,但对于银河系盘附近的源则大幅增加。

英文摘要:

We investigate two recent parameterizations of the galactic magnetic field with respect to their impact on cosmic nuclei traversing the field. We present a comprehensive study of the size of angular deflections, dispersion in the arrival probability distributions, multiplicity in the images of arrival on Earth, variance in field transparency, and influence of the turbulent field components. To remain restricted to ballistic deflections, a cosmic nucleus with energy E and charge Z should have a rigidity above E/Z=6 EV. In view of the differences resulting from the two field parameterizations as a measure of current knowledge in the galactic field, this rigidity threshold may have to be increased. For a point source search with E/Z>60 EV, field uncertainties increase the required signal events for discovery moderately for sources in the northern and southern regions, but substantially for sources near the galactic disk.

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