Work

Rapid Calculation of Theoretical Cosmic Microwave Background Angular Power Spectra

Year: 2002

Type: article

Abstract: We have developed a fast method for predicting the angular power spectrum C l of the cosmic microwave background given cosmological parameters and a primordial power spectrum of perturbations. After precomputing the radiation temperature and gravitational potential transfer functions over a small subspace of the total model parameter space, the rest of the model space (six or more cosmological parameters and arbitrarily many primordial power spectrum parameters) is reached via rapid analytic and semianalytic approximations that are highly accurate on all angular scales for which linear perturbation theory applies. A single power spectrum can be calculated in ~1 s on a desktop computer. We discuss applications to cosmological parameter estimation.

Source: The Astrophysical Journal

DOI: 10.1086/342656

Authors: Manoj Kaplinghat, Lloyd Knox, Constantinos Skordis

Institution: University of California, Davis

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: National Aeronautics and Space Administration

Award: ANALYSIS & INTERPRETATION OF CMB DATA (LTSA 2000)