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  • PhysRevD.89.127303

    Rights statement: © 2014 American Physical Society

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Hemispherical power asymmetry from a space-dependent component of the adiabatic power spectrum

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Hemispherical power asymmetry from a space-dependent component of the adiabatic power spectrum. / McDonald, John.
In: Physical Review D, Vol. 89, No. 12, 127303, 26.06.2014.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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McDonald J. Hemispherical power asymmetry from a space-dependent component of the adiabatic power spectrum. Physical Review D. 2014 Jun 26;89(12):127303. doi: 10.1103/PhysRevD.89.127303

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Bibtex

@article{fed0c24ad4b84c07a46a8828aa54cc11,
title = "Hemispherical power asymmetry from a space-dependent component of the adiabatic power spectrum",
abstract = "The hemispherical power asymmetry observed by Planck and WMAP can be interpreted as due to a spatially-varying and scale-dependent component of the adiabatic power spectrum. We derive general constraints on the magnitude and scale-dependence of a component with a dipole spatial variation. The spectral index and the running of the spectral index can be significantly shifted from their inflation model values, resulting in a smaller spectral index and a more positive running. A key prediction is a hemispherical asymmetry of the spectral index and of its running. Measurement of these asymmetries can test the structure of the perturbation responsible for the cosmic microwave background power asymmetry.",
keywords = "WMAP DATA, SKY MAPS",
author = "John McDonald",
note = "{\textcopyright} 2014 American Physical Society",
year = "2014",
month = jun,
day = "26",
doi = "10.1103/PhysRevD.89.127303",
language = "English",
volume = "89",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",
number = "12",

}

RIS

TY - JOUR

T1 - Hemispherical power asymmetry from a space-dependent component of the adiabatic power spectrum

AU - McDonald, John

N1 - © 2014 American Physical Society

PY - 2014/6/26

Y1 - 2014/6/26

N2 - The hemispherical power asymmetry observed by Planck and WMAP can be interpreted as due to a spatially-varying and scale-dependent component of the adiabatic power spectrum. We derive general constraints on the magnitude and scale-dependence of a component with a dipole spatial variation. The spectral index and the running of the spectral index can be significantly shifted from their inflation model values, resulting in a smaller spectral index and a more positive running. A key prediction is a hemispherical asymmetry of the spectral index and of its running. Measurement of these asymmetries can test the structure of the perturbation responsible for the cosmic microwave background power asymmetry.

AB - The hemispherical power asymmetry observed by Planck and WMAP can be interpreted as due to a spatially-varying and scale-dependent component of the adiabatic power spectrum. We derive general constraints on the magnitude and scale-dependence of a component with a dipole spatial variation. The spectral index and the running of the spectral index can be significantly shifted from their inflation model values, resulting in a smaller spectral index and a more positive running. A key prediction is a hemispherical asymmetry of the spectral index and of its running. Measurement of these asymmetries can test the structure of the perturbation responsible for the cosmic microwave background power asymmetry.

KW - WMAP DATA

KW - SKY MAPS

U2 - 10.1103/PhysRevD.89.127303

DO - 10.1103/PhysRevD.89.127303

M3 - Journal article

VL - 89

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 12

M1 - 127303

ER -