Dark Matter properties through cosmic history

20 Apr 2020Stéphane IlićMichael KoppConstantinos SkordisDaniel B. Thomas

We perform the first test of Dark Matter (DM) stress-energy evolution through cosmic history, using Cosmic Microwave Background measurements supplemented with Baryon Acoustic Oscillation data and the Hubble Space Telescope key project data. We constrain the DM equation of state (EoS) in 8 redshift bins, and its sound speed and (shear) viscosity in 9 redshift bins, finding no convincing evidence for non-$\Lambda$CDM values in any of the redshift bins... (read more)

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