Abstract
The large scale expansion rate of the Universe is given by the value of the Hubble constant. Several methods have been used to determine the Hubble constant: CMB anisotropies, supernovae observations, and AGN at high redshift. In this work we use the Grainge method to estimate the Hubble constant by using the Sunyaev-Zeldovich effect with data from the VSA interferometer (Observatorio El Teide) and the X-Ray data from ROSAT. The derived h = 0.78 is consistent with the reported value obtained with a different set of clusters of galaxies, and it is slightly higher than the h = 0.71 derived with other methods. We discuss the possible discrepancies in terms of the isothermal and spherical cluster hypothesis, and the the Sunyaev-Zeldovich kinetic effect.
