Calore F, Donato F, Manconi S
Université Grenoble Alpes, USMB, CNRS, LAPTh, F-74940 Annecy, France.
Dipartimento di Fisica, Università di Torino, via P. Giuria, 1, I-10125 Torino, Italy.
Phys Rev Lett. 2021 Oct 15;127(16):161102. doi: 10.1103/PhysRevLett.127.161102.
We combine adaptive template fitting and pixel count statistics in order to assess the nature of the Galactic Center excess in Fermi-LAT data. We reconstruct the flux distribution of point sources well below the Fermi-LAT detection threshold, and measure their radial and longitudinal profiles in the inner Galaxy. We find that all point sources and the bulge-correlated diffuse emission each contributes O(10%) of the total inner Galaxy emission, and disclose a potential subthreshold point-source contribution to the Galactic Center excess.
我们结合自适应模板拟合和像素计数统计，以评估费米大面积望远镜（Fermi-LAT）数据中银河系中心过量辐射的性质。我们重建了远低于费米大面积望远镜探测阈值的点源通量分布，并测量了它们在银河系内部的径向和纵向分布。我们发现，所有点源以及与星系核相关的弥漫发射各自对银河系内部总发射的贡献约为10%，并揭示了潜在的低于阈值的点源对银河系中心过量辐射的贡献。
