Likelihood Methods for CMB Experiments

Frontiers in Physics

Alessandro Gruppuso²  Gianluca Polenta³  Luca Pagano⁴  Paolo Natoli⁴  Loris Colombo⁵  Martina Gerbino⁷  Laura Salvati⁹  Massimiliano Lattanzi^1,11  Marina Migliaccio^1,12 

[1] 0INAF-OAS Bologna, Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Istituto Nazionale di Astrofisica, Bologna, Italy;1Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Bologna, Italy;2Space Science Data Center - Agenzia Spaziale Italiana, Rome, Italy;Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Ferrara, Ferrara, Italy;Dipartimento di Fisica, Università degli Studi di Milano, Milan, Italy;Dipartimento di Fisica, Università di Roma Tor Vergata, Rome, Italy;High Energy Physics (HEP) Division, Argonne National Laboratory, Lemont, IL, United States;INAF - Osservatorio Astronomico di Trieste, Trieste, Italy;Institut d'Astrophysique Spatiale, CNRS (UMR 8617) Université Paris-Sud, Orsay, France;Institute for Fundamental Physics of the Universe, Trieste, Italy;Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Ferrara, Italy;Istituto Nazionale di Fisica Nucleare, Sezione di Roma 2, Rome, Italy;

关键词: CMB;    likelihood function;    data analysis - methods;    parameter estimation;    CMB statistics;   

DOI  :  10.3389/fphy.2020.00015

来源: DOAJ

【 摘 要 】

A great deal of experimental effort is currently being devoted to the precise measurements of the cosmic microwave background (CMB) sky in temperature and polarization. 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.

【 授权许可】

Unknown