The entropy history of the universe

  title={The entropy history of the universe},
  author={Patrick Valageas and Joseph I. Silk},
Although usual hierarchical clustering scenarios agree with the main observed properties of Lymanα clouds and galaxies, they seem to fail to reproduce the cluster temperature X-ray luminosity relation. A possible explanation is that the IGM is reheated by supernovae or quasars before cluster formation. In this article, using a unified analytic model for quasars, galaxies, Lymanα absorbers and the IGM, we obtain the redshift evolution of the temperature and the entropy of the gas and the… CONTINUE READING