https://doi.org/10.1051/epjconf/202429300015
Small-scale CMB cosmological information
1 Institut d’Astrophysique Spatiale, CNRS, Université Paris Saclay, Orsay, France
2 Department of Physics and McGill Space Institute, McGill University, Montreal, QC, Canada H3A 2T8
* e-mail: marian.douspis@ias.u-psud.fr
Published online: 28 March 2024
The small-scale CMB angular power spectrum contains many contaminants from secondary anisotropies created by large-scale structures. Although their contribution is taken into account in the analyses, their cosmological dependence is often ignored. We propose a new analysis of SPT data focusing on the cosmological contributions of the Sunyaev Zel’dovich effects (tSZ and kSZ). After modelling these two effects and building a power spectrum emulator, we show that using the cosmological information of the tSZ and kSZ in addition to that of the primordial CMB contained in the small-scale SPT data provides comparable constraints on the reionisation history to those of the large-scale data of Planck.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
