论文标题
伽马射线布拉萨尔的来源计数分布
Source-count Distribution of Gamma-Ray Blazars
论文作者
论文摘要
凭借十年的运行和出色的数据集，费米大区域望远镜使我们能够揭示出超过$ \ rm \ rm 100 \，mev $ $ \ rm \ rm \ rm \ rm的详细组成。在本文中，我们通过效率校正方法得出了$ | b |> 20^{\ circ} $在$ | b |> 20^{\ circ} $的固有源计数分布（即logn-logs）。通过这种方法，我们能够测量分布到$ \ sim10^{ - 10} $$ {\ rm \，ph \，\，\，cm^{ - 2} \，s^{ - 1}} $的能量通量，以及$ \ sim10^{ - 12} $ \ sim10^{ - 12} $ rmMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM cm^{ - 2} \，s^{ - 1}} $。在这两种情况下，logn-logs在低通量下都变得更平坦。此外，我们表明，这种logn-logs代表了大型种群（假设大多数无关来源是Blazars），并且使我们能够非常有效地限制其进化。在最近提出的进化模型中，我们发现纯密度演化（PDE）模型最能描述Blazar总体的进化特性，并且它们的集成排放占$ \ sim 50^{+10} _ { - 5} _ { - 5} \％$的总总质量\ gm-gm-ray。
With ten years of operation and an exceptional dataset, the Fermi-Large Area Telescope allows us to unveil the detailed composition of the extragalactic $γ$-ray sky above $\rm 100\,MeV$. In this paper, we derive the intrinsic source-count distribution (logN-logS) of extragalactic sources (i.e., blazars) at $|b|>20^{\circ}$ via the efficiency correction method. With this approach, we are able to measure the distribution down to a photon flux of $\sim10^{-10}$${\rm \, ph \,\, cm^{-2} \, s^{-1}}$ and to an energy flux of $\sim10^{-12}$${\rm \, erg \,\, cm^{-2} \, s^{-1}}$. In both cases the logN-logS becomes flatter at low fluxes. Moreover, we show that this logN-logS is representative of the blazar population (assuming the majority of unassociated sources are blazars) and allows us to constrain its evolution quite effectively. Among recently proposed evolutionary models, we find that the Pure Density Evolution (PDE) model best describes the evolutionary properties of the blazar population and that their integrated emission accounts for $\sim 50^{+10}_{-5}\%$ of the total extragalactic \gm-ray background.
