Cosmic strings and the two-point galaxy-galaxy correlation function

Abstract

We calculated the two-point galaxy-galaxy correlation function ξ within the cosmic string model and compared with the observed result of Davis and Peebles [1] and found that the model can satisfactorily explain the observed ξ-curve. One interesting result is that, using the cosmic string scenario, one can naturally obtain a feature that other cosmological models have difficulty in accounting for, namely, the “bend” of the 1 + ξ curve at r c ≈ 3 h −1 Mpc, when the exponent in the power law changes from −2 to −0.85, [2].