Dark matter subhaloes as gamma-ray sources and candidates in the first Fermi-LAT catalogue

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Volume 538 (February 2012)

A&A, 538 (2012) A93

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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	m_χ = 500 GeV			150 GeV		g_r(c_vir)
Model		W⁺ W⁻	τ⁺ τ⁻	τ⁺ τ⁻	[kpc]	g_r(c_vir)

FHM	≳321	≳479	≳1386	≳138	0.067
SHM^a	≳8	≳12	≳35	≳3	0.029

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

^(a)

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

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