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Title: Constraining neutrino masses with the integrated-Sachs-Wolfe-galaxy correlation function

Abstract

Temperature anisotropies in the cosmic microwave background (CMB) are affected by the late integrated Sachs-Wolfe (lISW) effect caused by any time variation of the gravitational potential on linear scales. Dark energy is not the only source of lISW, since massive neutrinos induce a small decay of the potential on small scales during both matter and dark energy domination. In this work, we study the prospect of using the cross correlation between CMB and galaxy-density maps as a tool for constraining the neutrino mass. On the one hand massive neutrinos reduce the cross-correlation spectrum because free-streaming slows down structure formation; on the other hand, they enhance it through their change in the effective linear growth. We show that in the observable range of scales and redshifts, the first effect dominates, but the second one is not negligible. We carry out an error forecast analysis by fitting some mock data inspired by the Planck satellite, Dark Energy Survey (DES) and Large Synoptic Survey Telescope (LSST). The inclusion of the cross correlation data from Planck and LSST increases the sensitivity to the neutrino mass m{sub {nu}} by 38% (and to the dark energy equation of state w by 83%) with respect to Planckmore » alone. The correlation between Planck and DES brings a far less significant improvement. This method is not potentially as good for detecting m{sub {nu}} as the measurement of galaxy, cluster, or cosmic shear power spectra, but since it is independent and affected by different systematics, it remains potentially interesting if the total neutrino mass is of the order of 0.2 eV; if instead it is close to the lower bound from atmospheric oscillations, m{sub {nu}}{approx}0.05 eV, we do not expect the ISW-galaxy correlation to be ever sensitive to m{sub {nu}}.« less

Authors:
; ;  [1];  [2]
  1. LAPTH, Universite de Savoie and CNRS, BP110, F-64941 Annecy-le-vieux Cedex (France)
  2. (Spain)
Publication Date:
OSTI Identifier:
21249789
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 77; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.77.063505; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ANISOTROPY; CORRELATION FUNCTIONS; CORRELATIONS; DENSITY; EQUATIONS OF STATE; GALAXIES; GALAXY CLUSTERS; MASS; NEUTRINOS; NONLUMINOUS MATTER; OSCILLATIONS; RED SHIFT; RELICT RADIATION; SATELLITES; SENSITIVITY; SPECTRA; TELESCOPES; VARIATIONS

Citation Formats

Lesgourgues, Julien, Valkenburg, Wessel, Gaztanaga, Enrique, and Institut de Ciencies de l'Espai, CSIC/IEEC, Campus UAB, F. de Ciencies, Torre C5 par-2, Barcelona 08193. Constraining neutrino masses with the integrated-Sachs-Wolfe-galaxy correlation function. United States: N. p., 2008. Web. doi:10.1103/PHYSREVD.77.063505.
Lesgourgues, Julien, Valkenburg, Wessel, Gaztanaga, Enrique, & Institut de Ciencies de l'Espai, CSIC/IEEC, Campus UAB, F. de Ciencies, Torre C5 par-2, Barcelona 08193. Constraining neutrino masses with the integrated-Sachs-Wolfe-galaxy correlation function. United States. doi:10.1103/PHYSREVD.77.063505.
Lesgourgues, Julien, Valkenburg, Wessel, Gaztanaga, Enrique, and Institut de Ciencies de l'Espai, CSIC/IEEC, Campus UAB, F. de Ciencies, Torre C5 par-2, Barcelona 08193. Sat . "Constraining neutrino masses with the integrated-Sachs-Wolfe-galaxy correlation function". United States. doi:10.1103/PHYSREVD.77.063505.
@article{osti_21249789,
title = {Constraining neutrino masses with the integrated-Sachs-Wolfe-galaxy correlation function},
author = {Lesgourgues, Julien and Valkenburg, Wessel and Gaztanaga, Enrique and Institut de Ciencies de l'Espai, CSIC/IEEC, Campus UAB, F. de Ciencies, Torre C5 par-2, Barcelona 08193},
abstractNote = {Temperature anisotropies in the cosmic microwave background (CMB) are affected by the late integrated Sachs-Wolfe (lISW) effect caused by any time variation of the gravitational potential on linear scales. Dark energy is not the only source of lISW, since massive neutrinos induce a small decay of the potential on small scales during both matter and dark energy domination. In this work, we study the prospect of using the cross correlation between CMB and galaxy-density maps as a tool for constraining the neutrino mass. On the one hand massive neutrinos reduce the cross-correlation spectrum because free-streaming slows down structure formation; on the other hand, they enhance it through their change in the effective linear growth. We show that in the observable range of scales and redshifts, the first effect dominates, but the second one is not negligible. We carry out an error forecast analysis by fitting some mock data inspired by the Planck satellite, Dark Energy Survey (DES) and Large Synoptic Survey Telescope (LSST). The inclusion of the cross correlation data from Planck and LSST increases the sensitivity to the neutrino mass m{sub {nu}} by 38% (and to the dark energy equation of state w by 83%) with respect to Planck alone. The correlation between Planck and DES brings a far less significant improvement. This method is not potentially as good for detecting m{sub {nu}} as the measurement of galaxy, cluster, or cosmic shear power spectra, but since it is independent and affected by different systematics, it remains potentially interesting if the total neutrino mass is of the order of 0.2 eV; if instead it is close to the lower bound from atmospheric oscillations, m{sub {nu}}{approx}0.05 eV, we do not expect the ISW-galaxy correlation to be ever sensitive to m{sub {nu}}.},
doi = {10.1103/PHYSREVD.77.063505},
journal = {Physical Review. D, Particles Fields},
number = 6,
volume = 77,
place = {United States},
year = {Sat Mar 15 00:00:00 EDT 2008},
month = {Sat Mar 15 00:00:00 EDT 2008}
}