Non-gaussianity from isocurvature perturbations

Kazunori Nakayama

Non-gaussianity from isocurvature perturbations

Research output: Contribution to conference › Paper › peer-review

Abstract

We develop a formalism to study non-Gaussianity in both curvature and isocurvature perturbations. It is shown that non-Gaussianity in the CDM/baryonic isocurvature perturbation leaves distinct signatures in the CMB temperature fluctuations, which may be confirmed in future experiments, or possibly, even in the currently available observational data. As an explicit example, we consider the QCD axion and show that it can actually induce sizable non-Gaussianity.

Original language	English
Publication status	Published - 2008
Externally published	Yes
Event	18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008 - Higashi-Hiroshima, Japan Duration: 2008 Nov 17 → 2008 Nov 21

Other

Other	18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008
Country/Territory	Japan
City	Higashi-Hiroshima
Period	08/11/17 → 08/11/21

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Cite this

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title = "Non-gaussianity from isocurvature perturbations",

abstract = "We develop a formalism to study non-Gaussianity in both curvature and isocurvature perturbations. It is shown that non-Gaussianity in the CDM/baryonic isocurvature perturbation leaves distinct signatures in the CMB temperature fluctuations, which may be confirmed in future experiments, or possibly, even in the currently available observational data. As an explicit example, we consider the QCD axion and show that it can actually induce sizable non-Gaussianity.",

author = "Kazunori Nakayama",

year = "2008",

language = "English",

note = "18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008 ; Conference date: 17-11-2008 Through 21-11-2008",

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T1 - Non-gaussianity from isocurvature perturbations

AU - Nakayama, Kazunori

PY - 2008

Y1 - 2008

N2 - We develop a formalism to study non-Gaussianity in both curvature and isocurvature perturbations. It is shown that non-Gaussianity in the CDM/baryonic isocurvature perturbation leaves distinct signatures in the CMB temperature fluctuations, which may be confirmed in future experiments, or possibly, even in the currently available observational data. As an explicit example, we consider the QCD axion and show that it can actually induce sizable non-Gaussianity.

AB - We develop a formalism to study non-Gaussianity in both curvature and isocurvature perturbations. It is shown that non-Gaussianity in the CDM/baryonic isocurvature perturbation leaves distinct signatures in the CMB temperature fluctuations, which may be confirmed in future experiments, or possibly, even in the currently available observational data. As an explicit example, we consider the QCD axion and show that it can actually induce sizable non-Gaussianity.

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M3 - Paper

AN - SCOPUS:84888186104

T2 - 18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008

Y2 - 17 November 2008 through 21 November 2008

ER -

Non-gaussianity from isocurvature perturbations

Abstract

Other

ASJC Scopus subject areas

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