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Title: Large-scale tests of the Dvali-Gabadadze-Porrati model

Abstract

The self-accelerating braneworld model (DGP) can be tested from measurements of the expansion history of the Universe and the formation of structure. Current constraints on the expansion history from supernova luminosity distances, the cosmic microwave background (CMB), and the Hubble constant exclude the simplest flat DGP model at about 3{sigma}. Even including spatial curvature, the best-fit open DGP model is a marginally poorer fit to the data than flat {lambda}CDM. Moreover, its substantially different expansion history raises serious challenges for the model from structure formation. A dark energy model with the same expansion history would predict a highly significant discrepancy with the baryon oscillation measurement due the high Hubble constant required. For the DGP model to satisfy this constraint new nonlinear phenomena must correct this discrepancy. Likewise the large enhancement of CMB anisotropies at the lowest multipoles due to the ISW effect would require either a cutoff in the initial power or new phenomena at the cross-over scale. A prediction that is robust to both possibilities is that high-redshift galaxies should be substantially correlated with the CMB through the ISW effect. This correlation should provide a sharp test of the DGP model in the future.

Authors:
;  [1];  [2];  [1];  [2]
  1. Kavli Institute for Cosmological Physics, Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
21020149
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.75.064003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANISOTROPY; BARYONS; BRANES; CORRELATIONS; COSMOLOGY; GALAXIES; HUBBLE EFFECT; MULTIPOLES; NONLINEAR PROBLEMS; NONLUMINOUS MATTER; OSCILLATIONS; QUANTUM FIELD THEORY; RELICT RADIATION; SUPERNOVAE; UNIVERSE

Citation Formats

Song, Yong-Seon, Hu, Wayne, Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637, Sawicki, Ignacy, and Department of Physics, University of Chicago, Chicago, Illinois 60637. Large-scale tests of the Dvali-Gabadadze-Porrati model. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.064003.
Song, Yong-Seon, Hu, Wayne, Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637, Sawicki, Ignacy, & Department of Physics, University of Chicago, Chicago, Illinois 60637. Large-scale tests of the Dvali-Gabadadze-Porrati model. United States. doi:10.1103/PHYSREVD.75.064003.
Song, Yong-Seon, Hu, Wayne, Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637, Sawicki, Ignacy, and Department of Physics, University of Chicago, Chicago, Illinois 60637. Thu . "Large-scale tests of the Dvali-Gabadadze-Porrati model". United States. doi:10.1103/PHYSREVD.75.064003.
@article{osti_21020149,
title = {Large-scale tests of the Dvali-Gabadadze-Porrati model},
author = {Song, Yong-Seon and Hu, Wayne and Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637 and Sawicki, Ignacy and Department of Physics, University of Chicago, Chicago, Illinois 60637},
abstractNote = {The self-accelerating braneworld model (DGP) can be tested from measurements of the expansion history of the Universe and the formation of structure. Current constraints on the expansion history from supernova luminosity distances, the cosmic microwave background (CMB), and the Hubble constant exclude the simplest flat DGP model at about 3{sigma}. Even including spatial curvature, the best-fit open DGP model is a marginally poorer fit to the data than flat {lambda}CDM. Moreover, its substantially different expansion history raises serious challenges for the model from structure formation. A dark energy model with the same expansion history would predict a highly significant discrepancy with the baryon oscillation measurement due the high Hubble constant required. For the DGP model to satisfy this constraint new nonlinear phenomena must correct this discrepancy. Likewise the large enhancement of CMB anisotropies at the lowest multipoles due to the ISW effect would require either a cutoff in the initial power or new phenomena at the cross-over scale. A prediction that is robust to both possibilities is that high-redshift galaxies should be substantially correlated with the CMB through the ISW effect. This correlation should provide a sharp test of the DGP model in the future.},
doi = {10.1103/PHYSREVD.75.064003},
journal = {Physical Review. D, Particles Fields},
number = 6,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}