English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The observational value of the velocity dispersion, $\Delta\upsilon$, ismissing in the Dark Matter (DM) puzzle. Non-zero or non-thermal DM velocitiescan drastically influence Large Scale Structure and the 21-cm temperature atthe epoch of the Cosmic Dawn, as well as the estimation of DM physicalparameters, such as the mass and the interaction couplings. To study thephenomenology of $\Delta\upsilon$ we model the evolution of DM in terms of asimplistic and generic Boltzmann-like momentum distribution. Using cosmologicaldata from the Cosmic Microwave Background, Baryonic Acoustic Oscillations, andRed Luminous Galaxies, we constrain the DM velocity dispersion for a broadrange of masses $10^{-3} eV < m_\chi < 10^9 eV$, finding $\Delta\upsilon_0\lesssim$ 0.33 km/s (99% CL). Including the EDGES $T_{21}$-measurements, weextend our study to constrain the baryon-DM interaction in the range of DMvelocities allowed by our analysis. As a consequence, we present new bounds ontwo electromagnetic models of DM, namely minicharged particles (MCPs) andelectric dipole moment (EDM). For MCPs, the parameter region that is consistentwith EDGES and independent bounds on cosmological and stellar physics is verysmall, pointing to the sub-eV mass regime of DM. A window in the MeV-GeV maystill be compatible with these bounds for MCP models without a hidden photon.But the EDM parameter region consistent with EDGES is excluded by Big-BangNucleosynthesis and Collider Physics.

Constraints on the velocity dispersion of Dark Matter from Cosmology and new bounds on scattering from the Cosmic Dawn