Université de GenèveDépartement de Physique ThéoriqueCAP Genève

Back Reaction from Walls

27. February 2012
Cite as: 
E. Di Dio, M. Vonlanthen, R. Durrer, JCAP 1202 (2012) 036 [arXiv:1111.5764].

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.


Département de Physique Théorique
Université de Genève
24, quai Ernest Ansermet
1211 Genève 4
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