Isotropic and anisotropic spectral distortions of the Cosmic Microwave Background: data analysis for the COSMO and OLIMPO experiments.
Tiny spectral distortions of the isotropic component of the Cosmic Microwave Background are expected at a level of 1 part per million of its maximum brightness, due to processes happening during the hypothetical cosmological inflation phase, 13.7 billion years ago, and later. Anistropic distortions of the spectrum are expected in the directions of the lines of sight crossing clusters of galaxies and filaments of ionized baryons related to the large scale structure of the Universe. The COSMO and OLIMPO instruments, developed by our research group, aim at the detection of these distortions, and require specific analysis methods and models. Here we seek support to develop these tools, which represent essential ingredients of the experiments.