Effects of Cosmological Constant on Clustering of Galaxies
  In this paper, we analyse the effect of the expansion of the universe on the
clustering of galaxies. We evaluate the configurational integral for
interacting system of galaxies in an expanding universe by including effects
produced by the cosmological constant. The gravitational partition function is
obtained using this configuration integral. Thermodynamic quantities,
specifically, Helmholtz free energy, entropy, internal energy, pressure and
chemical potential are also derived for this system. It is observed that they
depend on the modified clustering parameter for this system of galaxies. It is
also demonstrated that these thermodynamical quantities get corrected because
of the cosmological constant.
