Large-scale anomalies from primordial dissipation

Guido D'Amico; Roberto Gobbetti; Matthew Kleban; Marjorie Schillo

doi:10.1088/1475-7516/2013/11/013

Large-scale anomalies from primordial dissipation

Guido D'Amico, Roberto Gobbetti, Matthew Kleban, Marjorie Schillo

Research output: Contribution to journal › Article › peer-review

Abstract

We analyze an inflationary model in which part of the power in density perturbations arises due to particle production. The amount of particle production is modulated by an auxiliary field. Given an initial gradient for the auxiliary field, this model produces a hemispherical power asymmetry and a suppression of power at low multipoles similar to those observed by WMAP and Planck in the CMB temperature. It also predicts an additive contribution to δT with support only at very small l that is aligned with the direction of the power asymmetry and has a definite sign, as well as small oscillations in the power spectrum at all l.

Original language	English (US)
Article number	013
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2013
Issue number	11
DOIs	https://doi.org/10.1088/1475-7516/2013/11/013
State	Published - Nov 2013

Keywords

CMBR theory
cosmological perturbation theory
initial conditions and eternal universe

ASJC Scopus subject areas

Astronomy and Astrophysics

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10.1088/1475-7516/2013/11/013

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abstract = "We analyze an inflationary model in which part of the power in density perturbations arises due to particle production. The amount of particle production is modulated by an auxiliary field. Given an initial gradient for the auxiliary field, this model produces a hemispherical power asymmetry and a suppression of power at low multipoles similar to those observed by WMAP and Planck in the CMB temperature. It also predicts an additive contribution to δT with support only at very small l that is aligned with the direction of the power asymmetry and has a definite sign, as well as small oscillations in the power spectrum at all l.",

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author = "Guido D'Amico and Roberto Gobbetti and Matthew Kleban and Marjorie Schillo",

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AU - D'Amico, Guido

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AU - Schillo, Marjorie

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N2 - We analyze an inflationary model in which part of the power in density perturbations arises due to particle production. The amount of particle production is modulated by an auxiliary field. Given an initial gradient for the auxiliary field, this model produces a hemispherical power asymmetry and a suppression of power at low multipoles similar to those observed by WMAP and Planck in the CMB temperature. It also predicts an additive contribution to δT with support only at very small l that is aligned with the direction of the power asymmetry and has a definite sign, as well as small oscillations in the power spectrum at all l.

AB - We analyze an inflationary model in which part of the power in density perturbations arises due to particle production. The amount of particle production is modulated by an auxiliary field. Given an initial gradient for the auxiliary field, this model produces a hemispherical power asymmetry and a suppression of power at low multipoles similar to those observed by WMAP and Planck in the CMB temperature. It also predicts an additive contribution to δT with support only at very small l that is aligned with the direction of the power asymmetry and has a definite sign, as well as small oscillations in the power spectrum at all l.

KW - CMBR theory

KW - cosmological perturbation theory

KW - initial conditions and eternal universe

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Large-scale anomalies from primordial dissipation

Abstract

Keywords

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