Search for dark matter in clusters of galaxies

Clusters of galaxies have an exceptional place in the chain of structural formation. They are the largest gravitational entities and the best of cosmic laboratories. Their mass is orders of magnitude higher than the Jeans mass scale (≈ 10(15) M_{⊙}), and hence still preserve the knowledge of early universe baryon and dark matter mixture (f_{gas}= M_{gas}/M_{tot} approx Omega_{b}/Omega_M}) as the clusters grow from large-scale structures. The assumption of an extended isothermal gas sitting in hydrostatic equilibrium is used to estimate the M-T$ relation. We described the temperature, density, and pressure of the intra-cluster medium and measured the cluster gas mass fraction for our moderately large sample.