2007/06/23 by Kazuhide Ichikawa, Ichikawa, Kazuhide
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.0706.3465
8 pages, 3 figures. Proceedings for the XIXth Rencontres de Blois, May 2007
arxiv created 2007/06/23 · arxiv updated 2009/12/01
We discuss constraints on the effective number of neutrino species Nnu from recent cosmological observations such as CMB, LSS, BBN, including our own analysis which uses the WMAP and the Luminous Red Galaxy power spectrum data. We also discuss their implications on some non-standard cosmological scenarios such as the low (MeV-scale) reheating temperature scenario and the scenario with decaying particles between BBN and structure formation.