Cosmology with the SZ spectrum: Measuring the Universe’s temperature with galaxy clustersGemma Luzzi, Emanuele D’Angelo, Herve Bourdin, Federico De Luca, Pasquale Mazzotta, Filippo Oppizzi and Gianluca PolentaEPJ Web Conf., 257 (2022) 00028DOI: https://doi.org/10.1051/epjconf/202225700028