Observational constraints on self-accelerating cosmology

By R. Maartens, E. Majerotto. 2006

147 citations recorded by the source corpus.

The Dvali-Gabadadze-Porrati (DGP) braneworld model provides a simple alternative to the standard lambda cold dark matter cosmology, with the same number of parameters. There is no dark energy—the late universe self-accelerates due to an infrared modification of gravity. We compute the joint constraints on the DGP model from supernovae, the cosmic microwave background shift parameter, and the baryon oscillation peak in the Sloan Digital Sky Survey luminous red galaxy sample. Flat DGP models are within the joint 2 sigma contour, but the lambda cold dark matter model provides a significantly better fit to the data. These tests are based on the background dynamics of the DGP model, and we comment on further tests that involve structure formation

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/568c92bf328d0d6ce5f471b25d6a4b328ae137f7

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Citations in the corpus

Modified Gravity and Cosmology (2011, methodology): “Maartens and Majerotto [846] used SN-Ia [1064, 67], a CMB shift parameter [1261]), and BAO data [467] to place constraints on the self-accelerating FLRW background.”
f(R) Theories (2010, methodology): “The joint constraints from the data of SN Ia, BAO, and the CMB shift parameter show that the flat DGP model is under strong observational pressure, while the open DGP model gives a slightly better fit [405, 549].”
A kinematical approach to dark energy studies (2006, background): “…modified gravity theories, motivated by e.g. the existence of extra dimensions (Dvali et al. 2000; Deffayet et al. 2002; Deffayet et al. 2002; Maartens & Majerotto 2006; Guo et al. 2006) or other modifications of General Relativity (Capozziello et al. 2003; Carroll et al. 2004; Vollick 2003;…”
Approaches to understanding cosmic acceleration (2009, methodology): “The = +1 choice corresponds to the selfaccelerated branch, sDGP; this model naturally leads to the late-time acceleration and has been recently tested against SNeIa, BAO and CMB data [180].”
Cosmology and Fundamental Physics with the Euclid Satellite (2012, unknown): “We consider the flat space case studied in [799].”
Massive Gravity (2014, methodology): “The cosmology of DGP has led to a major conceptual breakthrough, namely the realization that the Universe could be ‘self-accelerating’.”