The influence of structure formation on the cosmic expansion (2009)
Clarkson, Chris, Ananda, Kishore, Larena, Julien
We investigate the effect that the average backreaction of structure formation has on the dynamics of the cosmological expansion, within the concordance model. Our approach in the Poisson gauge is...
On the co-existence of matter dominated and accelerating solutions in f(G)-gravity (2009)
Goheer, Naureen, Goswami, Rituparno, Dunsby, Peter K. S., Ananda, Kishore
Working within the theory of modified Gauss-Bonnet gravity, we show that FLRW--like power--law solutions only exist for a very special class of f(G)theories. Furthermore, we point out that any...
The cosmological background of vector modes (2008)
Lu, Teresa Hui-Ching, Ananda, Kishore, Clarkson, Chris, Maartens, Roy
We investigate the spectrum of vector modes today which is generated at second order by density perturbations. The vector mode background that is generated by structure formation is small but in...
Vector modes generated by primordial density fluctuations (2007)
Lu, Teresa Hui-Ching, Ananda, Kishore, Clarkson, Chris
While vector modes are usually ignored in cosmology since they are not produced during inflation they are inevitably produced from the interaction of density fluctuations of differing wavelengths....