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arXiv 2209.08593astro-ph.HE
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检验强子与光强子相互作用作为星暴星系超高频宇宙线和中微子通量来源的假设

Testing hadronic and photo-hadronic interactions as responsible for UHECR and neutrino fluxes from Starburst Galaxies

Antonio Condorelli, Denise Boncioli, Enrico Peretti, Sergio Petrera

AI总结:

本文首次在 SimProp 中实现源环境强子过程,检验星暴星系作为超高能宇宙线与高能中微子来源的假设,发现高气体密度下散裂反应对中微子产出的贡献可超过光强子相互作用。

摘要:

我们检验星暴星系作为超高能宇宙线和高能中微子来源的假设。超高能宇宙线在星暴环境中的相互作用以及向地球传播过程中的计算,使用修改版的蒙特卡洛程序 SimProp 完成,其中首次在源环境中实现了强子过程。考虑源的恒星形成率分布后,计算了超高能宇宙线和高能中微子的通量并与观测结果进行比较,同时讨论了所探索的源特征参数空间。我们发现,根据源环境中气体密度的不同,散裂反应在源环境和星系际空间中产生的中微子结果可能超过光强子相互作用所产生的中微子。

英文摘要:

We test the hypothesis of starburst galaxies as sources of ultra-high energy cosmic rays and high-energy neutrinos. The computation of interactions of ultra-high energy cosmic rays in the starburst environment as well as in the propagation to the Earth is made using a modified version of the Monte Carlo code {\it SimProp}, where hadronic processes in the environment of sources are implemented for the first time. Taking into account a star-formation-rate distribution of sources, the fluxes of ultra-high energy cosmic rays and high-energy neutrinos are computed and compared with observations, and the explored parameter space for the source characteristics is discussed. We find that, depending on the density of the gas in the source environment, spallation reactions could exceed theoutcome in neutrinos from photo-hadronic interactions in the source environment and in the extra-galactic space.

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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