%0 Generic %1 vipp2021rapid %A Vipp, Venno %A Hektor, Andi %A Hütsi, Gert %D 2021 %K tifr %T Rapid onset of the 21-cm signal suggests a preferred mass range for dark matter particle %U http://arxiv.org/abs/2103.07462 %X We are approaching a new era to probe the 21-cm neutral hydrogen signal from the period of cosmic dawn. This signal offers a unique window to the virgin Universe, e.g., to study dark matter models with different small-scale behaviours. The EDGES collaboration has recently published the first results of the global 21-cm spectrum. We demonstrate that such a signal can be used to set, unlike most observations concerning dark matter, both lower and upper limits for the mass of dark matter particles. We study the 21-cm signal resulting from a simple warm dark matter model with a sharp-$k$ window function calibrated for high redshifts. We tie the PopIII star formation to Lyman-alpha and radio background production. Using MCMC to sample the parameter space we find that to match the EDGES signal, a warm dark matter particle must have a mass of $7.3^+1.6_-3.3$ keV at 68\% confidence interval. This translates to $2.2^+1.4_-1.7 10^-20$ eV for fuzzy dark matter and $63^+19_-35$ keV for Dodelson-Widrow sterile neutrinos. Cold dark matter is unable to reproduce the signal due to its slow structure growth.

@misc{vipp2021rapid, abstract = {We are approaching a new era to probe the 21-cm neutral hydrogen signal from the period of cosmic dawn. This signal offers a unique window to the virgin Universe, e.g., to study dark matter models with different small-scale behaviours. The EDGES collaboration has recently published the first results of the global 21-cm spectrum. We demonstrate that such a signal can be used to set, unlike most observations concerning dark matter, both lower and upper limits for the mass of dark matter particles. We study the 21-cm signal resulting from a simple warm dark matter model with a sharp-$k$ window function calibrated for high redshifts. We tie the PopIII star formation to Lyman-alpha and radio background production. Using MCMC to sample the parameter space we find that to match the EDGES signal, a warm dark matter particle must have a mass of $7.3^{+1.6}_{-3.3}$ keV at 68\% confidence interval. This translates to $2.2^{+1.4}_{-1.7} \times 10^{-20}$ eV for fuzzy dark matter and $63^{+19}_{-35}$ keV for Dodelson-Widrow sterile neutrinos. Cold dark matter is unable to reproduce the signal due to its slow structure growth.}, added-at = {2021-03-15T06:03:07.000+0100}, author = {Vipp, Venno and Hektor, Andi and Hütsi, Gert}, biburl = {https://www.bibsonomy.org/bibtex/2f85c991cceb281c9b1188d1a4d7287b9/citekhatri}, description = {Rapid onset of the 21-cm signal suggests a preferred mass range for dark matter particle}, interhash = {655cda14517c95e310e6cddd0e0fd8af}, intrahash = {f85c991cceb281c9b1188d1a4d7287b9}, keywords = {tifr}, note = {cite arxiv:2103.07462Comment: Prepared for submission to PRD. Comments welcome!}, timestamp = {2021-03-15T06:03:07.000+0100}, title = {Rapid onset of the 21-cm signal suggests a preferred mass range for dark matter particle}, url = {http://arxiv.org/abs/2103.07462}, year = 2021 }