arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.01014astro-ph.HE
收藏

对地球粒子流贡献很小的河外cosmic ray源及其研究

Extragalactic cosmic ray sources with very small contribution in the particle flux on the Earth and their study

A. Uryson

摘要:

考虑了可能存在的河外超高能宇宙线源,给出了地球上的一个非常小的粒子通量。围绕超大质量黑洞的粒子加速在电场的吸积盘作为这样的源的一个例子进行了讨论。由于加速机制,粒子注入谱被假定为是困难的。在这种情况下,地球上的粒子通量太低,无法检测。但是粒子在太空中通过电磁级联产生了明显的弥散伽马射线辐射通量。在分析其他源模型和暗物质模型时应考虑到这一点。中微子也是级联产生的,在能量E >10^19 eV时,级联中微子谱取决于注入谱。因此,建议利用伽马射线和中微子发射数据研究正在审议的宇宙射线源。

英文摘要:

Possible existence of extragalactic ultra-high energy cosmic ray sources giving a very small particle flux on the Earth is considered. Accretion discs around supermassive black holes where particles are accelerated in electric fields are discussed as an illustration of such sources. Due to acceleration mechanism particle injection spectra are assumed to be hard. In this case particle flux on the Earth is too low for detection. But particles produce in space a noticeable flux of diffuse gamma-ray emission via electromagnetic cascades. It should be accounted for when analyzing other source models and dark matter models. Also neutrinos are produced in cascades, and at energies E >10^19 eV cascade neutrino spectra depends on injection spectra. Therefore it is proposed to study cosmic ray sources under consideration using data on gamma-ray and neutrino emission.

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。

↑