Bright gamma-ray Galactic Center excess and dark dwarfs: Strong tension for dark matter annihilation despite Milky Way halo profile and diffuse emission uncertainties

被引：45

作者：

Abazajian, Kevork N. ^{[1
]}

Keeley, Ryan E. ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Ctr Cosmol, Irvine, CA 92697 USA

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 08期

基金：

美国国家科学基金会;

关键词：

DENSITY PROFILE; HIGH-ENERGY;

D O I：

10.1103/PhysRevD.93.083514

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We incorporate Milky Way dark matter halo profile uncertainties, as well as an accounting of diffuse gamma-ray emission uncertainties in dark matter annihilation models for the Galactic Center Extended gamma-ray excess (GCE) detected by the Fermi Gamma Ray Space Telescope. The range of particle annihilation rate and masses expand when including these unknowns. However, two of the most precise empirical determinations of the Milky Way halo's local density and density profile leave the signal region to be in considerable tension with dark matter annihilation searches from combined dwarf galaxy analyses for single-channel dark matter annihilation models. The GCE and dwarf tension can be alleviated if: one, the halo is very highly concentrated or strongly contracted; two, the dark matter annihilation signal differentiates between dwarfs and the GC; or, three, local stellar density measures are found to be significantly lower, like that from recent stellar counts, increasing the local dark matter density.

引用

页数：9

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