Abstract Details
| Name: Dr Naseer Iqbal Affiliation: Department of Physics University of Kashmir Srinagar Conference ID: ASI2016_828 Title : Entropy Change and Phase transitions in an Expanding Universe Authors and Co-Authors : Tabasum Masood and Nasser Demir Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : The work complies a correlated study of a gravitational quasi-equilibrium thermodynamic approach for establishing and signifying a unique behaviour of the cosmological entropy and phase transitions in an expanding universe. On the basis of prescribed boundary conditions for the cluster temperature a relation for the intra cluster medium(ICM) of galaxy clusters have been derived. A more productive and signifying approach of the correlation functions used for the galaxy clustering phenomena shows a unique behaviour of the entropy change where a phenomena known as the gravitational phase transition occurs. This unique behaviour occurs with a symmetry breaking from mild clustering to low clustering and from mild clustering to higher order clustering which differs from a normal symmetry breaking in material sciences. We also derive results for the specific latent heat associated with the phase transitions of 3.20Tc and 0.55Tc, for the mildly clustered phase to the low clustered phase and from the mildly clustered phase to the highly clustered phase, respectively. |