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25 April 2024
 
  » arxiv » astro-ph/9706198

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Measuring cosmological parameters with galaxy surveys
Max Tegmark ;
Date 19 Jun 1997
Journal Phys.Rev.Lett. 79 (1997) 3806-3809
Subject astro-ph
AffiliationIAS
AbstractWe assess the accuracy with which future galaxy surveys can measure cosmological parameters by deriving a handy approximation that we validate numerically. We find that galaxy surveys are quite complementary to future Cosmic Microwave Background (CMB) experiments. By breaking parameter degeneracies of the Planck CMB satellite in a cold dark matter cosmology, the Sloan Digital Sky Survey might be able to reduce the Planck error bars by about an order of magnitude on the large-scale power normalization and the reionization optical depth, down to percent levels. However, pinpointing attainable accuracies to within better than a factor of a few depends crucially on whether it will be possible to extract useful information from the mildly nonlinear regime.
Source arXiv, astro-ph/9706198
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