标题： 用质子耀变星启发的模型解释来自半人马座A的宇宙射线和伽马射线的相关观测 显示英文标题

标题： Interpreting correlated observations of cosmic rays and gamma-rays from Centaurus A with a proton blazar inspired model

摘要： 最近的活动星系核（射电星系）半人马座A（Cen A）是在GeV到TeV能区发射伽马射线的。高能立体望远镜系统（H.E.S.S.）和非同时期费米-大面积望远镜（Fermi-LAT）观测表明，在Cen A的伽马射线谱中，高于几个GeV的能量区域表现出一种异常的谱硬化现象。最近，H.E.S.S.天文台在TeV能量下解析了半人马座A中的千秒差距（kpc）尺度喷流。另一方面，皮埃尔·奥杰天文台（PAO）探测到来自Cen-A的若干超高能宇宙射线（UHECR）事件。质子耀变星启发的模型，考虑了活动星系核喷流中电子和强子宇宙射线的加速过程，可以解释由冰立方探测器发现的活动星系核喷流中观测到的高能中微子和伽马射线的同时性。在这里，我们采用了质子耀变星启发的模型来解释Cen A的观测到的从GeV到TeV伽马射线谱特征，包括在GeV能量处的谱硬化现象，以及来自PAO关于Cen A宇宙射线的观测结果。我们的研究结果表明，该模型能够一致地解释由适当数量的Cen A超高能宇宙射线与观测到的电磁频谱组合而成的现象。 显示英文摘要

摘要： The nearest active radio galaxy Centaurus (Cen) A is a gamma-ray emitter in GeV to TeV energy scale. The High Energy Stereoscopic System (H.E.S.S.) and non-simultaneous Fermi-LAT observation indicate an unusual spectral hardening above few GeV energies in the gamma-ray spectrum of Cen A. Very recently the H.E.S.S. observatory resolved the kilo parsec (kpc)-scale jets in Centaurus A at TeV energies. On the other hand, the Pierre Auger Observatory (PAO) detects a few ultra high energy cosmic ray (UHECR) events from Cen-A. The proton blazar inspired model, which considers acceleration of both electrons and hadronic cosmic rays in AGN jet, can explain the observed coincident high energy neutrinos and gamma rays from Ice-cube detected AGN jets. Here we have employed the proton blazar inspired model to explain the observed GeV to TeV gamma-ray spectrum features including the spectrum hardening at GeV energies along with the PAO observation on cosmic rays from Cen-A. Our findings suggest that the model can explain consistently the observed electromagnetic spectrum in combination with the appropriate number of UHECRs from Cen A.