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Table 1

Enhancement factors  ⟨ σv ⟩ eff/ ⟨ σv ⟩ 0 required to explain the fiducial γ-ray source with a DM subhalo of 106   M.

Model mχ = 500   GeV 150 GeV gr(cvir)
W+ W τ+ τ τ+ τ [kpc]

FHM  ≳321  ≳479  ≳1386  ≳138 0.067
SHMa  ≳8  ≳12  ≳35  ≳3 0.029

Notes. The factors correspond to the WIMP models discussed in the text. The respective photon yields are for mχ = 500   GeV and for mχ = 150   GeV. We list the minimum values within the c-scatter. In addition, the subhalo’s (average) characteristic radius is depicted.


The normalisation of implies the Galactic position (114°,  − 55°) and intrinsic extent θs = 1°, corresponding to D ≈ 1.7 kpc (Dgc ≈ 8.8 kpc).

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