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Up-to-date estimates of the cosmological parameters are presented as a result of numerical simulationsof cosmic microwave background and large scale structure, considering a flat Universe inwhich the dark matter is made entirely or partly of mirror matter, and the primordial perturbationsare scalar adiabatic and in linear regime. A statistical analysis using the Markov Chain Monte Carlomethod allows to obtain constraints of the cosmological parameters. As a result, we show that aUniverse with pure mirror dark matter is statistically equivalent to the case of an admixture withcold dark matter. The upper limits for the ratio of the temperatures of ordinary and mirror sectorsare around 0.3 for both the cosmological models, which show the presence of a dominant fraction ofmirror matter, 0.06≲Ωmirrorh2≲0.12

Cosmological Constraints on Mirror Matter Parameters