W-singularities in cosmological models

Leonardo Fernández-Jambrina

Recently a new type of cosmological has been postulated for infinite w parameter in the equation of state $p=w \rho$ of the cosmological fluid but vanishing pressure and density at the singular event. Apparently the parameter w would be the only physical quantity to blow up at the singularity.

In this talk we would like to discuss the strength of such singularities and compare them with other types. We show that they are weak singularities and that they are similar to type IV singularities.

References

M.P. Dabrowski, T. Denkiewicz, Phys.Rev. D 79, 063521 (2009)