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The cosmic microwave background (CMB) is the thermal radiation assumed to be left over from the "Big Bang" of cosmology. The CMB is a snapshot of the oldest light in our universe, imprinted on the sky when the universe was just 380,000 years old. It shows tiny temperature fluctuations that correspond to regions of slightly different densities, representing the seeds of all future structure: the stars and galaxies of today. Therefore, analysis of the small anisotropies in the CMB helps us to understand the origin and the fate of our universe. In past few decades, there has been a lot of improvement in the observations and several experiments, performed to understand the basic structure of the universe. For analyzing data of different cosmological experiments and for understanding the theoretical nature of the universe many advanced methods and computing software are developed in and used by Cosmologists for years. These software are widely used by the cosmologists across the globe. The computational software, used in cosmology can be classified into the following major classes. * Map generation and processing software: These software are used for preparing the CMB sky maps from the crude observational data. The software HEALPIX〔(【引用サイトリンク】url=http://healpix.jpl.nasa.gov/ )〕 is used for map generation and processing. * Cosmological Boltzmann codes: These codes are used for calculating the theoretical power spectrum given the cosmological parameters. These codes are capable of calculating the power spectrum from the standard LCDM model or its derivatives. Some of the most used CMB Boltzmann codes are CMBFAST,〔(【引用サイトリンク】first=U., & Zaldarriaga, M. )〕 CAMB, CMBEASY,〔(【引用サイトリンク】first=Michael )〕 CLASS,〔(【引用サイトリンク】first=J. )〕 CMBAns etc. * Cosmological parameter estimator: The parameter estimation codes are used for calculating the best-fit parameters from the observation data. The ready to used codes available for this purpose are CosmoMC, AnalyzeThis, SCoPE etc. == Map generation and processing software == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of cosmological computation software」の詳細全文を読む スポンサード リンク
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