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arXiv · 1909.09375

Likelihood methods for CMB experiments

Martina Gerbino·Massimiliano Lattanzi·Marina Migliaccio·Luca Pagano·Laura Salvati·Loris Colombo·Alessandro Gruppuso·Paolo Natoli·Gianluca Polenta
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Abstract

A great deal of experimental effort is currently being devoted to the precise measurements of the cosmic microwave background (CMB) sky in temperature and polarisation. Satellites, balloon-borne, and ground-based experiments scrutinize the CMB sky at multiple scales, and therefore enable to investigate not only the evolution of the early Universe, but also its late-time physics with unprecedented accuracy. The pipeline leading from time ordered data as collected by the instrument to the final product is highly structured. Moreover, it has also to provide accurate estimates of statistical and systematic uncertainties connected to the specific experiment. In this paper, we review likelihood approaches targeted to the analysis of the CMB signal at different scales, and to the estimation of key cosmological parameters. We consider methods that analyze the data in the spatial (i.e., pixel-based) or harmonic domain. We highlight the most relevant aspects of each approach and compare their performance.

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Martina Gerbino, Massimiliano Lattanzi, Marina Migliaccio, Luca Pagano, Laura Salvati, Loris Colombo, Alessandro Gruppuso, Paolo Natoli, Gianluca Polenta. 2019-09-20. Likelihood methods for CMB experiments. https://doi.org/10.3389/fphy.2020.00015

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