Very-high-energy gamma ray emission from AGN jets

我们最近开发了来自活动星系核的相对论性喷流的广谱发射的新理论模型（AGN; Potter & Cotter 2012, 2013a,b,c）。这让我们可以利用伽马射线和其他波长的观测来研究喷流及其底部黑洞的物理特性。目前，这些模型现在建议扩展这些模型，以特别关注(i)射流中的快速变化和耀斑，（ii）射流在其宿主星系中传播时的重粒子夹带，以及射流中强子粒子过程的可能性，以及（iii）轴子样粒子在射流内部和AGN与地球之间的星系间空间中的传播。我们将研究如何使用切伦科夫望远镜阵列（CTA）来确定导致耀斑的物理条件以及强子过程中发射的存在和程度。

We have recently developed new theoretical models for the broad-spectrum emission from relativistic jets from Active Galactic Nuclei (AGN; Potter & Cotter 2012, 2013a,b,c). These let us use the gamma-ray observations and those at other wavelengths to investigate the physical properties of the jet and the black hole at its base. At present these models now propose to extend these models to look in particular at (i) rapid variability and flaring in jets and (ii) entrainment of heavy particles as the jets propagate through their host galaxy, and the resulting possibility of hadronic particle processes within the jets, and (iii) propagation of axion-like particles both within the jet and in intergalactic space between the AGN and the Earth.We will investigate how the Cherenkov Telescope Array (CTA) may be used to determine the physical conditions that lead to flaring and the presence, and extent, of emission from hadronic processes.