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

Yin-Zhe Ma, Gong-Bo Zhao

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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 languageEnglish
Pages (from-to)402-411
JournalPhysical Letters B
Publication statusPublished - 30 Jul 2014


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