4-5 December 2018
Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine
Europe/Kiev timezone

21-cm observations and warm dark matter models

4 Dec 2018, 15:40
Oral Astrophysics and Cosmology Astrophysics and Cosmology


Anton Rudakovskyi (Bogolyubov Institute for Theoretical Physics)


Recent report of 21-cm absorption signal by EDGES experiment has raised considerable interest in the dark matter (DM) community. Taking the reported EDGES result at face value, a number of forthcoming papers constrained masses of DM particles and their interaction strengths with Standard Model particles.
However, the connection between the formation of structures and 21-cm signal requires knowledge of parameters that describe star formation and radiation at early times.
We use the recent measurements by EDGES to demonstrate that the robust warm dark matter (WDM) bounds are in fact weaker than those given by the Lyman-$\alpha$ forest method and other structure formation bounds.
We also show that resonantly produced 7 keV sterile neutrino dark matter model is consistent with these data.

Primary author

Anton Rudakovskyi (Bogolyubov Institute for Theoretical Physics)

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