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Title: Reconstructing the integrated Sachs-Wolfe map with galaxy surveys

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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 4; Related Information: CHORUS Timestamp: 2016-08-05 18:09:15; Journal ID: ISSN 2470-0010
American Physical Society
Country of Publication:
United States

Citation Formats

Muir, Jessica, and Huterer, Dragan. Reconstructing the integrated Sachs-Wolfe map with galaxy surveys. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.043503.
Muir, Jessica, & Huterer, Dragan. Reconstructing the integrated Sachs-Wolfe map with galaxy surveys. United States. doi:10.1103/PhysRevD.94.043503.
Muir, Jessica, and Huterer, Dragan. 2016. "Reconstructing the integrated Sachs-Wolfe map with galaxy surveys". United States. doi:10.1103/PhysRevD.94.043503.
title = {Reconstructing the integrated Sachs-Wolfe map with galaxy surveys},
author = {Muir, Jessica and Huterer, Dragan},
abstractNote = {},
doi = {10.1103/PhysRevD.94.043503},
journal = {Physical Review D},
number = 4,
volume = 94,
place = {United States},
year = 2016,
month = 8

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.94.043503

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Cited by: 1work
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  • I discuss several issues that arise when trying to constrain the dark energy equation of state using correlations of the integrated Sachs-Wolfe effect with galaxy counts and lensing of the cosmic microwave background. These techniques are complementary to others such as galaxy shear surveys, and can use data that will already be obtained from currently planned observations. In regimes where cosmic variance and shot noise are the dominant sources of error, constraints could be made on the mean equation of state to {+-}0.33 and its first derivative to {+-}1.0. Perhaps more interesting is that the determination of dark energy parametersmore » by these types of experiments depends strongly on the presence or absence of perturbations in the dark energy fluid.« less
  • 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; onmore » 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}}.« less
  • A generic prediction of general relativity is that the cosmological linear density growth factor D is scale independent. But in general, modified gravities do not preserve this signature. A scale dependent D can cause time variation in gravitational potential at high redshifts and provides a new cosmological test of gravity, through early time integrated Sachs-Wolfe (ISW) effect-large scale structure (LSS) cross correlation. We demonstrate the power of this test for a class of f(R) gravity, with the form f(R) = {lambda}{sub 1}H{sub 0}{sup 2} exp(-R/{lambda}{sub 2}H{sub 0}{sup 2}). Such f(R) gravity, even with degenerate expansion history to {Lambda}CDM, can producemore » detectable ISW effect at z {approx}> 3 and l {approx}> 20. Null-detection of such effect would constrain {lambda}{sub 2} to be {lambda}{sub 2} > 1000 at > 95% confidence level. On the other hand, robust detection of ISW-LSS cross correlation at high z will severely challenge general relativity.« less
  • Cited by 13