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arXiv · 1309.1163

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

Yin-Zhe Ma·Gong-Bo Zhao
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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 $\ell=1000$ to $10000$, 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 $\gtrsim10\%$ change on the kSZ spectrum; changing the dark energy dynamics parametrized by $w_a$ by $\pm0.5$, 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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Yin-Zhe Ma, Gong-Bo Zhao. 2014-07-08. Dark energy imprints on the kinematic Sunyaev-Zel'dovich signal. https://doi.org/10.1016/j.physletb.2014.06.066

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