Can EDGES observation favour any dark matter model?
  The recent detection of the 21-cm absorption signal by the EDGES
collaboration has been widely used to constrain the basic properties of dark
matter particles. However, extracting the parameters of the 21-cm absorption
signal relies on a chosen parametrization of the foreground radio emission.
Recently, the new parametrizations of the foreground and systematics have been
proposed, showing significant deviations of the 21-cm signal parameters from
those assumed by the original EDGES paper. In this paper, we consider this new
uncertainty, comparing the observed signal with the predictions of several dark
matter models, including the widely used cold dark matter model, 1-3 keV warm
dark matter models, and 7 keV sterile neutrino (SN7) model, capable of
producing the reported 3.5 keV line. We show that all these dark matter models
cannot be statistically distinguished using the available EDGES data.
