论文标题
附近的活性银河核和星状星系作为测得的UHECRS各向异性信号的来源
Nearby active galactic nuclei and starburst galaxies as sources of the measured UHECRs anisotropy signal
论文作者
论文摘要
皮埃尔螺旋钻和望远镜阵列天文台在超高能量宇宙射线（UHECR）的到达方向上测量了独立和统计的显着各向异性。在天空和能量范围的不同区域已经鉴定出了相对过量事件和偶极信号的三个热点区域。在本文中，我们研究了这些各向异性信号可以由附近（<23 MPC）活性银河核（AGN）和/或Starburst星系（SBG）产生的条件。我们研究了广泛的可能性，包括注射核（P，HE，N，SI和FE），三个UHECR发光量代理和三个三个外层状磁场模型。结果表明，需要局部AGN和SBG来描述所有各向异性信号。在大多数情况下，AGN对热点和偶极子产生的贡献是主要的。仅需要SBG来解释望远镜阵列观测站测量的热点。
The Pierre Auger and the Telescope Array observatories have measured independent and statistical significant anisotropy in the arrival direction of ultra-high-energy cosmic rays (UHECR). Three hotspot regions with relative excess of events and a dipole signal have been identified in different regions of the sky and energy ranges. In this paper, we investigate the conditions under which these anisotropy signal could be generated by nearby (<23 Mpc) active galactic nuclei (AGN) and/or starburst galaxies (SBG). We studied a wide range of possibilities including injected nuclei (p, He, N, Si, and Fe), three UHECR luminosity proxies and three extragalactic magnetic field models. The results shows that both local AGN and SBG are needed to describe all the anisotropy signal. The contribution of AGN to hotspots and to the generation of the dipole is dominant in most cases. SBG is required only to explain the hotspot measured by the Telescope Array Observatory.
