Bibcode
Falcón, N.; Génova-Santos, R.
Bibliographical reference
XII Latin American IAU Regional Meeting (Eds. G. Magris, G. Bruzual, & L. Carigi) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 35, pp. 217-218 (2009) (http://www.astroscu.unam.mx/~rmaa/)
Advertised on:
5
2009
Citations
0
Refereed citations
0
Description
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.