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arXiv · 2111.03427

Cosmology with the SZ spectrum: measuring the Universe's temperature with galaxy clusters

Gemma Luzzi·Emanuele D'Angelo·Hervé Bourdin·Federico De Luca·Pasquale Mazzotta·Filippo Oppizzi·Gianluca Polenta
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Abstract

The hot gas in clusters of galaxies creates a distinctive spectral distortion in the cosmic microwave background (CMB) via the Sunyaev-Zel'dovich (SZ) effect. The spectral signature of the SZ can be used to measure the CMB temperature at cluster redshift ($T_{\rm CMB}(z)$) and to constrain the monopole of the y-type spectral distortion of the CMB spectrum. In this work, we start showing the measurements of $T_{\rm CMB}(z)$ for a sample extracted from the Second Catalog of galaxy clusters produced by Planck (PSZ2) and containing 75 clusters selected from CHEX-MATE. Then we show the forecasts for future CMB experiments about the constraints on the monopole of the y-type spectral distortion of the CMB spectrum via the spectrum of the SZE.

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Gemma Luzzi, Emanuele D'Angelo, Hervé Bourdin, Federico De Luca, Pasquale Mazzotta, Filippo Oppizzi, Gianluca Polenta. 2021-11-05. Cosmology with the SZ spectrum: measuring the Universe's temperature with galaxy clusters. https://doi.org/10.1051/epjconf/202225700028

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