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In their recent paper, Chan and Lee discuss an interesting possibility: radiocontinuum emission from a dwarf irregular galaxy may be used to constrain upperlimits on the cross section of annihilating dark matter. They claim that thecontributions from nonthermal and thermal emission can be estimated with suchaccuracy that one can place new upper limits on the annihilation cross section.We argue that the observations presented can be explained entirely with astandard spectrum and no contribution from dark matter. As a result, theestimated upper limits of Chan and Lee are atleast by a factor of 100 too low.

Comment on "Constraining the annihilating dark matter mass by the radio continuum spectral data of NGC4214 galaxy"