GREAT ATTRACTOR-LIKE STRUCTURES AND LARGE-SCALE ANISOTROPY

The effect on the cosmic microwave background of isolated Great Attrac tor-like objects is numerically computed. The code is based on the Tol man-Bondi solution of the Einstein equations. The background is assume d to be an open universe. The density parameter OMEGA0 is varied from 0.15 to 0.4. Great Attractor-like structures are placed at redshifts b etween 2 and 30. As a result of the chosen backgrounds and locations, these structures produce pure gravitational spots with amplitudes appr oximately 10(-5) and angular sizes of a few degrees. A significant par t of the large-scale anisotropy of the microwave background could be p roduced by these spots. This fact highlights the need for important mo difications of the current ideas about anisotropy production on large angular scales.