The non-Gaussian perturbations produced by global texture lead to the early formation of stars, quasars, and galaxies. We calculate growth of the density fluctuation in cold dark matter (CDM) induced by the unwinding of a texture "knot" and determine the evolution of the mass multiplicity function in this galaxy formation model. By z ∼ 50, ∼3% of the mass of the universe has formed nonlinear objects of mass greater than 106 M⊙ - these objects may have reionized the universe. Most objects larger than 1012 M⊙ form by z ∼ 2-3, consistent with the observed epoch of QSO formation. Today, ∼35% of the mass of the universe is in bound objects of mass greater than 1012 M⊙. We find that the slope and the amplitude of the multiplicity function is consistent with the observed galaxy luminosity function.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
- Galaxies: formation