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Title: Neutrinos and large-scale structure

Abstract

I review the use of cosmological large-scale structure to measure properties of neutrinos and other relic populations of light relativistic particles. With experiments to measure the anisotropies of the cosmic microwave anisotropies and the clustering of matter at low redshift, we now have securely measured a relativistic background with density appropriate to the cosmic neutrino background. Our limits on the mass of the neutrino continue to shrink. Experiments coming in the next decade will greatly improve the available precision on searches for the energy density of novel relativistic backgrounds and the mass of neutrinos.

Authors:
 [1]
  1. Daniel J. Eisenstein, Harvard-Smithsonian Center for Astrophysics, 60 Garden St., MS #20, Cambridge, MA 02138 (United States)
Publication Date:
OSTI Identifier:
22490662
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1666; Journal Issue: 1; Conference: Neutrino 2014: 26. international conference on neutrino physics and astrophysics, Boston, MA (United States), 2-7 Jun 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCURACY; ANISOTROPY; COSMIC NEUTRINOS; DENSITY; ENERGY DENSITY; RED SHIFT; RELATIVISTIC RANGE; RELICT RADIATION; REST MASS; VISIBLE RADIATION

Citation Formats

Eisenstein, Daniel J. Neutrinos and large-scale structure. United States: N. p., 2015. Web. doi:10.1063/1.4915586.
Eisenstein, Daniel J. Neutrinos and large-scale structure. United States. doi:10.1063/1.4915586.
Eisenstein, Daniel J. Wed . "Neutrinos and large-scale structure". United States. doi:10.1063/1.4915586.
@article{osti_22490662,
title = {Neutrinos and large-scale structure},
author = {Eisenstein, Daniel J.},
abstractNote = {I review the use of cosmological large-scale structure to measure properties of neutrinos and other relic populations of light relativistic particles. With experiments to measure the anisotropies of the cosmic microwave anisotropies and the clustering of matter at low redshift, we now have securely measured a relativistic background with density appropriate to the cosmic neutrino background. Our limits on the mass of the neutrino continue to shrink. Experiments coming in the next decade will greatly improve the available precision on searches for the energy density of novel relativistic backgrounds and the mass of neutrinos.},
doi = {10.1063/1.4915586},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1666,
place = {United States},
year = {Wed Jul 15 00:00:00 EDT 2015},
month = {Wed Jul 15 00:00:00 EDT 2015}
}
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  • A large-scale simulation is made of the plane-symmetric collapse of massive neutrinos. It is found that a condensation forms in the central plane with high mass density, a velocity dispersion much lower than the mean value, and a phase space density which is nearly equal over a large region to the maximum of the original distribution. The coarse-grain average phase space density over the central megaparsec is comfortably higher than that for an extended galactic halo. It is concluded that there is no obstacle to the formation of massive neutrino galactic halos in the neutrino variant of the adiabatic theorymore » of galaxy formation, because a population of neutrinos arises which may easily be bound into galactic halos. The calculations, with the exception of the thermal broadening, will apply to any system of collisionless particles.« less