Supernovae Constraints on DGP Model and Cosmic Topology

TL;DR

This paper investigates how detecting a non-trivial cosmic topology, specifically the Poincaré dodecahedral space, can impose constraints on the parameters of the DGP braneworld model using supernova data.

Contribution

It demonstrates that the PDS topology provides strong, complementary constraints on DGP model parameters through supernova observations.

Findings

PDS topology constrains DGP parameters significantly.

Supernova data supports the compatibility of PDS topology with DGP model.

Topology detection can refine cosmological model parameters.

Abstract

We study the constraints that the detection of a non-trivial spatial topology may place on the parameters of braneworld models by considering the Dvali-Gabadadze-Porrati (DGP) and the globally homogeneous Poincar\'e dodecahedral spatial (PDS) topology as a circles-in-the-sky observable topology. To this end we reanalyze the type Ia supernovae constraints on the parameters of the DGP model and show that PDS topology gives rise to strong and complementary constraints on the parameters of the DGP model.