Microwave background constraints on the Voronoi model of large-scale structure

Details Microwave background constraints on the Voronoi model of large-scale structure Microwave background constraints on the Voronoi model of large-scale structure

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.244..557c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 244, June 1, 1990, p. 557-562.

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17

Astronomical Models, Computational Astrophysics, Galactic Structure, Relic Radiation, Anisotropy, Density Distribution, Red Shift, Temperature Distribution, Universe

Scientific paper

It is shown that the Voronoi model for large-scale structure formation, in which primordial underdensities expand faster than the mean Hubble flow, produces large microwave background temperature anisotropies over angular scales up to one degree. Observational limits on anisotropies on such scales constrain cluster formation to occur at unrealistically low redshifts - unless the initial conditions are high non-Gaussian, there is significant reionization of the universe, or the primoridal underdensities develop from explosive, nongravitational, origins.

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