Dark energy imprints on the kinematic Sunyaev-Zel'dovich signal

Yin-Zhe Ma; Gong-Bo Zhao

doi:10.1016/j.physletb.2014.06.066

Dark energy imprints on the kinematic Sunyaev-Zel'dovich signal

Yin-Zhe Ma, Gong-Bo Zhao

Institute of Cosmology & Gravitation

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Abstract

We investigate the imprint of dark energy on the kinetic Sunyaev–Zel'dovich (kSZ) angular power spectrum on scales of to l = 1000 to 10,000, and find that the kSZ signal is sensitive to the dark energy parameter. For example, varying the constant w by 20% around w = -1 results in a ≳10% change on the kSZ spectrum; changing the dark energy dynamics parametrized by w _a by ±0.5, a 30% change on the kSZ spectrum is expected. We discuss the observational aspects and develop a fitting formula for the kSZ power spectrum. Finally, we discuss how the precise modeling of the post-reionization signal would help the constraints on patchy reionization signal, which is crucial for measuring the duration of reionization.

Original language	English
Pages (from-to)	402-411
Journal	Physical Letters B
Volume	735
DOIs	https://doi.org/10.1016/j.physletb.2014.06.066
Publication status	Published - 30 Jul 2014

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1-s2.0-S0370269314004717-mainFinal published version, 631 KBLicence: CC BY

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title = "Dark energy imprints on the kinematic Sunyaev-Zel'dovich signal",

abstract = "We investigate the imprint of dark energy on the kinetic Sunyaev–Zel'dovich (kSZ) angular power spectrum on scales of to l = 1000 to 10,000, and find that the kSZ signal is sensitive to the dark energy parameter. For example, varying the constant w by 20\% around w = -1 results in a ≳10\% change on the kSZ spectrum; changing the dark energy dynamics parametrized by w a by ±0.5, a 30\% change on the kSZ spectrum is expected. We discuss the observational aspects and develop a fitting formula for the kSZ power spectrum. Finally, we discuss how the precise modeling of the post-reionization signal would help the constraints on patchy reionization signal, which is crucial for measuring the duration of reionization.",

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AU - Ma, Yin-Zhe

AU - Zhao, Gong-Bo

PY - 2014/7/30

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N2 - We investigate the imprint of dark energy on the kinetic Sunyaev–Zel'dovich (kSZ) angular power spectrum on scales of to l = 1000 to 10,000, and find that the kSZ signal is sensitive to the dark energy parameter. For example, varying the constant w by 20% around w = -1 results in a ≳10% change on the kSZ spectrum; changing the dark energy dynamics parametrized by w a by ±0.5, a 30% change on the kSZ spectrum is expected. We discuss the observational aspects and develop a fitting formula for the kSZ power spectrum. Finally, we discuss how the precise modeling of the post-reionization signal would help the constraints on patchy reionization signal, which is crucial for measuring the duration of reionization.

AB - We investigate the imprint of dark energy on the kinetic Sunyaev–Zel'dovich (kSZ) angular power spectrum on scales of to l = 1000 to 10,000, and find that the kSZ signal is sensitive to the dark energy parameter. For example, varying the constant w by 20% around w = -1 results in a ≳10% change on the kSZ spectrum; changing the dark energy dynamics parametrized by w a by ±0.5, a 30% change on the kSZ spectrum is expected. We discuss the observational aspects and develop a fitting formula for the kSZ power spectrum. Finally, we discuss how the precise modeling of the post-reionization signal would help the constraints on patchy reionization signal, which is crucial for measuring the duration of reionization.

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EP - 411

JO - Physical Letters B

JF - Physical Letters B

ER -

Dark energy imprints on the kinematic Sunyaev-Zel'dovich signal

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