Relic neutrino clustering in the Milky Way

Abstract

The Standard Cosmological Model predicts the existence of relic neutrinos, which are indirectly probed through the effective number of relativistic species in the early Universe. In addition, from neutrino flavour oscillations we know that at least two of the neutrino mass states have a non-zero mass. Since the expansion of the Universe has diluted the energy of relic neutrinos, those that are massive are also non relativistic today. This means that they can be trapped in strong gravitational potentials, such as the one of the Milky Way. We review the calculation of the local overdensity of relic neutrinos produced from the gravitational attraction of our Galaxy, Andromeda and the Virgo cluster, commenting on the implications for an experiment aiming at relic neutrino detection, such as the PTOLEMY project.

arXiv commentTo appear in TAUP2019 proceedings at Journal of Physics: Conference Series

References in corpus (17)

• Gaia Data Release 2. Summary of the contents and survey properties
• Cold dark matter haloes in the Planck era: evolution of structural parameters for Einasto and NFW profiles
• Relic neutrino decoupling including flavour oscillations
• Status of neutrino oscillations 2018: first hint for normal mass ordering and improved CP sensitivity
• The Circular Velocity Curve of the Milky Way from $5$ to $25$ kpc
• The Masses of the Milky Way and Andromeda galaxies
• The formation of disc galaxies in high resolution moving-mesh cosmological simulations
• Relic neutrino decoupling with flavour oscillations revisited
• Gravitational clustering of relic neutrinos and implications for their detection
• Neutrino physics with the PTOLEMY project: active neutrino properties and the light sterile case
• On the estimation of the Local Dark Matter Density using the rotation curve of the Milky Way
• The distribution of the ISM in the Milky Way A three-dimensional large-scale model
• Detecting non-relativistic cosmic neutrinos by capture on tritium: phenomenology and physics potential
• Thermalisation of sterile neutrinos in the early Universe in the 3+1 scheme with full mixing matrix
• Gravitational clustering of cosmic relic neutrinos in the Milky Way
• Calculation of the local density of relic neutrinos
• The dark matter profile of the Milky Way: a non-parametric reconstruction

Cited by in corpus (2)

• Direct Measurements of Neutrino Mass
• Limits on the cosmic neutrino background