Fig. 2
Radio halo spectrum of Coma and the best fits of three DM models with
Mχ = 9 GeV (upper
panel) for 
(solid with σV = 1.7 × 10-25 cm3 s-1
and B0 = 20 μG) and
τ ± (dashed with
σV = 5.6 × 10-25 cm3 s-1 and
B0 = 2.2 μG),
Mχ = 60 GeV (mid
panel) for
(solid with σV = 8.5 × 10-23 cm3 s-1
and B0 = 0.5 μG) and
τ ± (dashed with
σV = 9.0 × 10-22 cm3 s-1 and
B0 = 0.1 μG), and with
Mχ = 500 GeV (lower
panel) with
(solid with σV = 2.0 × 10-18 cm3 s-1
and B0 = 0.01 μG),
τ ± (dashed with
σV = 1.9 × 10-17 cm3 s-1 and
B0 = 0.002 μG) and W±
(dotted with
σV = 1.3 × 10-16 cm3 s-1 and
B0 = 0.001 μG). Data from Thierbach
et al. (2003). The results are obtained using
B(r) ∝ nth(r)
and NFW smooth DM profiles, without considering the effect of substructures.
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