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Fig. 1.
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Power spectra for CDM, mχ = 1 keV and mχ = 3 keV WDM. The WDM power spectra correspond to low-pass filtered versions of the CDM power spectrum. The vertical axis is unitless and arbitrarily normalised. The free-streaming scale is a function of the dark matter particle mass mχ, and is directly related to the cut-off scale.
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