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One of the current major challenges of cosmology is understand the nature of the dark energy. This work uses the data from supernovas type 1a, galaxies with old stellar populations, baryonic accustic oscilations and anisotropy of the cosmic microwave background to find through the Markov chains Monte Carlo method the free parameters of a possible equations of state for dark energy (ω(z)) on redshift 0 ≤ z ≤ 2000. However, this work did not find any type of significant difference between the equation of state suggested and ω = −1 inside the interval of redshift studied. Key-words: Cosmological Parameters, Cosmology, Dark Energy, Monte Carlo Method.

Explorando o setor escuro: usando o mÃ©todo de Monte Carlo para encontrar novos parÃ¢metros para a equaÃ§Ã£o de estado da energia escura