Anisotropy of the Cosmic Neutrino Background

Abstract

The cosmic neutrino background (CNB) consists of low-energy relic neutrinos which decoupled from the cosmological fluid at a redshift z ~ 10^{10}. Despite being the second-most abundant particles in the universe, direct observation remains a distant challenge. Based on the measured neutrino mass differences, one species of neutrinos may still be relativistic with a thermal distribution characterized by the temperature T ~ 1.9K. We show that the temperature distribution on the sky is anisotropic, much like the photon background, experiencing Sachs-Wolfe and integrated Sachs-Wolfe effects.

5 pages, 2 figures / updated references, discussion of earlier work

References in corpus (1)

• Massive neutrinos and cosmology

Cited by in corpus (7)

• Relativistic cosmology and large-scale structure
• Cosmic Neutrino Last Scattering Surface
• The Cosmic Neutrino Background Anisotropy - Linear Theory
• Influence of local structure on relic neutrino abundances and anisotropies
• Multi-Messenger Astrophysics with the Cosmic Neutrino Background
• Efficiently Extracting Energy from Cosmological Neutrinos
• Gravitational Lensing of the Cosmic Neutrino Background