Back Reaction from Walls

Details Back Reaction from Walls Back Reaction from Walls

2011-11-24

arxiv.org/abs/1111.5764v2

JCAP02(2012)036

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

26 pages, 9 figures

Scientific paper

10.1088/1475-7516/2012/02/036

We study the distance-redshift relation in a universe filled with 'walls' of pressure-less dust separated by under dense regions. We show that as long as the density contrast of the walls is small, or the diameter of the under dense regions is much smaller than the Hubble scale, the distance-redshift relation remains close to what is obtained in a Friedmann universe. However, when arbitrary density contrasts are allowed, every prescribed distance-redshift relation can be reproduced with such models.

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