ON THE WIDTH OF THE LAST SCATTERING SURFACE

NILZA PIRES, MARIA ASSUNTA S. NOBRE, JOSÉ A. S. LIMA
2004 International Journal of Modern Physics D  
We discuss the physical effects of some accelerated world models on the width of the last scattering surface (LSS) of the cosmic microwave background radiation (CMBR). The models considered in our analysis are X-matter (XCDM) and a Chaplygin type gas. The redshift of the LSS does not depend on the kind of dark energy (if XCDM of Chaplygin). Further, for a Chaplygin gas, the width of the LSS is also only weakly dependent on the kind of scenario (if we have dark energy plus cold dark matter or
more » ... d dark matter or the unified picture).
doi:10.1142/s0218271804005638 fatcat:5ayr6p3xnjhnrfnzaqcfprzgt4