On the microwave background anisotropies produced by nonlinear voids

Details On the microwave background anisotropies produced by nonlinear voids On the microwave background anisotropies produced by nonlinear voids

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...402..359a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 402, no. 2, p. 359-368.

Statistics

Computation

29

Anisotropy, Cosmology, Microwaves, Relic Radiation, Universe, Astronomical Models, Computational Astrophysics, Inhomogeneity

Scientific paper

The Tolman-Bondi solution of the Einstein equations is used to study the microwave background anisotropy produced by a pressureless spherical cosmological inhomogeneity. Our method improves on previous ones because it does not involve any approximating condition and it allows us to assume the following: (1) a general Friedmann-Robertson-Walker background, (2) an arbitrary relative location of the observer and the inhomogeneity, (3) either an overdense or an underdense inhomogeneity with arbitrary size, (4) an arbitrary initial energy density profile, and (5) an arbitrary amplitude of the density contrast. This general method is applied to compute the anisotropy produced by some nonlinear uncompensated density distributions, which mimic nearby voids.

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