How Massless Neutrinos Affect the Cosmic Microwave Background Damping Tail

• Main Authors: Hou, Zhen, Keisler, Ryan, Knox, Lloyd, Millea, Marius, Reichardt, Christian
• Format: Text
• Language: unknown
• Published: arXiv 2011
• Subjects: Cosmology and Nongalactic Astrophysics astro-ph.CO; FOS Physical sciences; South Pole; Wilkinson; South pole
• Online Access: https://dx.doi.org/10.48550/arxiv.1104.2333; https://arxiv.org/abs/1104.2333

We explore the physical origin and robustness of constraints on the energy density in relativistic species prior to and during recombination, often expressed as constraints on an effective number of neutrino species, Neff. Constraints from current data combination of Wilkinson Microwave Anisotropy P...