C_l interpolation for cosmological parameter estimation

Details C_l interpolation for cosmological parameter estimation C_l interpolation for cosmological parameter estimation

2003-10-27

arxiv.org/abs/astro-ph/0310754v1

Astronomy and Astrophysics

Astrophysics

Proceeding XV rencontres de Blois, june 2003. 4 pages

Scientific paper

I will briefly present my work on cosmological parameters estimation. Classical methods for parameters estimation involve the exploration of the parameter space on a precalculated grid of cosmological models. Here we try to estimate the cosmological parameters by using a minimization method associated with the interpolation of the C_l spectrum. We first use a simple multidimensional linear interpolation, and show the flaws of this method. We then introduce a new interpolation method, based on a physical description of the location of the acoustic peaks in the power spectrum

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