arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0908.4592astro-ph.COastro-ph.HE
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用费米和IACTs进行轴子搜索

Axion searches with Fermi and IACTs

Miguel A. Sanchez-Conde

摘要:

为解决强CP问题而提出的类轴子粒子(AxionLike Particles,ALP)在磁场中与光子耦合,可能导致活动星系核(AGN)等γ射线源的观测光谱发生显著变化。在这里,我们同时考虑在同一个框架中的光子/轴子混合发生在伽马射线源和一个预期发生在星系际磁场。我们表明,光子/轴子混合可以解释最近的困惑,关于观测到的光谱遥远的伽马射线源,以及最近公布的下限的EBL强度。最后,我们总结了不同的签名预期和讨论的最佳策略,以寻找ALP与费米卫星和目前的切伦科夫望远镜,如CANGAROO,HESS,MAGIC和VERITAS。

英文摘要:

Axion Like Particles (ALPs), postulated to solve the strong-CP problem, are predicted to couple with photons in the presence of magnetic fields, which may lead to a significant change in the observed spectra of gamma-ray sources such as AGNs. Here we simultaneously consider in the same framework both the photon/axion mixing that takes place in the gamma-ray source and that one expected to occur in the intergalactic magnetic fields. We show that photon/axion mixing could explain recent puzzles regarding the observed spectra of distant gamma-ray sources as well as the recently published lower limit to the EBL intensity. We finally summarize the different signatures expected and discuss the best strategy to search for ALPs with the Fermi satellite and current Cherenkov telescopes like CANGAROO, HESS, MAGIC and VERITAS.

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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